1 | //#define SQLITE
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2 |
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3 | using System;
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4 | using System.Collections.Generic;
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5 | using System.ComponentModel;
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6 | using System.Data;
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7 | using System.Data.Common;
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8 | using System.Data.SQLite;
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9 | using System.Data.SqlClient;
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10 | using System.Windows.Forms;
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11 | using System.Diagnostics;
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12 | using System.IO;
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13 | using System.Threading;
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14 | using System.Runtime.InteropServices;
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15 | using System.Deployment.Application;
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16 | using System.Text.RegularExpressions;
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17 | using System.Xml;
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18 | using System.Reflection;
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19 |
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20 | namespace Common
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21 | {
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22 | enum DatabaseType { MsSql, SQLite };
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23 |
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24 | class Database
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25 | {
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26 | public delegate void DatabaseInitializedHandler();
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27 | public static event DatabaseInitializedHandler DatabaseInitialized;
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28 | public delegate void LogMessageHandler(string text);
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29 | public static event LogMessageHandler LogMessage;
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30 | public static string databaseName = "";
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31 | public static string serverName = "";
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32 | public static string sqliteFileName;
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33 | private static Progress progressVar;
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34 | public static DatabaseType type = DatabaseType.MsSql;
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35 |
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36 | public static bool InitDb()
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37 | {
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38 | bool result = true;
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39 |
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40 | // Connect to server
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41 | if (type == DatabaseType.SQLite)
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42 | {
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43 | Directory.CreateDirectory(Path.GetDirectoryName(sqliteFileName));
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44 | databaseName = null;
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45 | }
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46 | using (DbConnection connection = GetConnection())
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47 | {
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48 | try
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49 | {
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50 | connection.Open();
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51 | connection.Close();
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52 | }
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53 | catch (DbException ex)
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54 | {
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55 | if ((ex is SqlException) && ((ex as SqlException).Number == 4060))
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56 | {
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57 | // database does not exist, try to create it
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58 | ExecuteNonQuery("CREATE DATABASE " + databaseName);
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59 |
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60 | // Need to wait for the new DB startup in order to continue and be sure it can be accessed
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61 | if (connection is SqlConnection) SqlConnection.ClearAllPools();
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62 | }
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63 | else
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64 | {
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65 | result = false;
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66 | Log("When connecting to DB: " + ex.Message);
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67 | throw new Exception("When connecting to DB: " + ex.Message);
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68 | }
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69 | }
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70 |
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71 | }
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72 | // Check if tables with settings exist, if not create them and fill them with default settings
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73 | if (result)
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74 | {
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75 | if (DatabaseInitialized != null)
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76 | DatabaseInitialized();
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77 | }
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78 |
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79 | return result;
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80 | }
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81 |
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82 | public static string GetConnectionString()
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83 | {
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84 | string connectionString = "";
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85 | if (type == DatabaseType.MsSql)
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86 | {
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87 | connectionString = "server=" + serverName + "; Trusted_Connection=yes; database=" + databaseName + "; connection timeout=5";
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88 | }
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89 | else
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90 | if (type == DatabaseType.SQLite)
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91 | {
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92 | connectionString = "Data Source=" + sqliteFileName + "; Version=3";
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93 | }
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94 | return connectionString;
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95 | }
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96 |
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97 | private static void Log(string message)
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98 | {
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99 | if (LogMessage != null) LogMessage(message);
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100 | }
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101 |
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102 | public static DbProviderFactory GetFactory()
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103 | {
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104 | DbProviderFactory factory = null;
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105 | if (type == DatabaseType.MsSql) factory = System.Data.SqlClient.SqlClientFactory.Instance;
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106 | else if (type == DatabaseType.SQLite) factory = System.Data.SQLite.SQLiteFactory.Instance;
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107 | return factory;
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108 | }
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109 |
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110 | public static DbConnection GetConnection()
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111 | {
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112 | DbConnection connection = GetFactory().CreateConnection();
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113 | connection.ConnectionString = GetConnectionString();
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114 | return connection;
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115 | }
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116 |
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117 | public static DbParameter CreateParameter()
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118 | {
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119 | return GetFactory().CreateParameter();
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120 | }
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121 |
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122 | private static DbDataAdapter CreateDataAdapter(DbCommand cmd)
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123 | {
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124 | DbDataAdapter adapter;
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125 | adapter = GetFactory().CreateDataAdapter();
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126 | adapter.SelectCommand = cmd;
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127 | return adapter;
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128 | }
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129 |
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130 | public static bool Connected()
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131 | {
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132 | using (DbConnection connection = GetConnection())
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133 | {
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134 | try
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135 | {
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136 | connection.Open();
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137 | connection.Close();
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138 | return true;
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139 | }
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140 | catch (DbException)
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141 | {
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142 | return false;
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143 | }
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144 | }
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145 | }
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146 |
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147 | public static bool TableExists(string tableName)
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148 | {
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149 | bool result = false;
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150 | using (DbConnection connection = GetConnection())
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151 | {
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152 | connection.Open();
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153 | DataTable table = connection.GetSchema("Tables", new string[] { databaseName, null, tableName });
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154 | result = table.Rows.Count > 0;
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155 | }
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156 | return result;
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157 | }
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158 |
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159 | public static bool TableColumnExists(string tableName, string columnName)
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160 | {
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161 | bool result = false;
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162 | using (DbConnection connection = GetConnection())
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163 | {
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164 | connection.Open();
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165 | DataTable table = connection.GetSchema("Columns", new string[] { databaseName, null, tableName, columnName});
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166 | result = table.Rows.Count > 0;
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167 | }
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168 | return result;
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169 | }
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170 |
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171 | public static bool TableIndexExists(string tableName, string indexName)
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172 | {
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173 | bool result = false;
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174 | using (DbConnection connection = GetConnection())
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175 | {
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176 | connection.Open();
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177 | DataTable table = connection.GetSchema("Indexes", new string[] { databaseName, null, tableName });
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178 | foreach (DataRow row in table.Rows)
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179 | {
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180 | if (row.ItemArray[0].ToString() == indexName)
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181 | {
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182 | result = true;
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183 | break;
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184 | }
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185 | }
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186 | }
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187 | return result;
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188 | }
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189 |
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190 | public static void TableDrop(string tableName)
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191 | {
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192 | if (TableExists(tableName)) ExecuteNonQuery("DROP TABLE " + tableName);
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193 | }
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194 |
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195 | public static void CopyFile(string sourceFileName, string destFileName, Progress progress)
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196 | {
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197 | byte[] buffer = new byte[1024 * 1024]; // 1MB buffer
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198 |
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199 | using (FileStream source = new FileStream(sourceFileName, FileMode.Open, FileAccess.Read))
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200 | {
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201 | progress.total = 1000;
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202 | using (FileStream dest = new FileStream(destFileName, FileMode.OpenOrCreate, FileAccess.Write))
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203 | {
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204 | long totalBytes = 0;
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205 | int currentBlockSize = 0;
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206 |
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207 | while ((currentBlockSize = source.Read(buffer, 0, buffer.Length)) > 0)
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208 | {
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209 | totalBytes += currentBlockSize;
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210 | dest.Write(buffer, 0, currentBlockSize);
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211 | progress.current = (int)((float)totalBytes / source.Length * progress.total);
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212 | if (progress.terminated) break;
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213 | }
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214 | }
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215 | }
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216 | if (progress.terminated) File.Delete(destFileName);
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217 | }
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218 |
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219 | public static void Backup(string backUpPath, Progress progress)
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220 | {
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221 | if (type == DatabaseType.MsSql)
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222 | {
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223 | progressVar = progress;
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224 | progressVar.total = 100;
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225 | using (DbConnection connection = GetConnection())
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226 | {
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227 | if (connection is SqlConnection)
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228 | {
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229 | (connection as SqlConnection).FireInfoMessageEventOnUserErrors = true;
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230 | (connection as SqlConnection).InfoMessage += OnInfoMessage;
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231 | }
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232 | connection.Open();
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233 |
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234 | using (DbCommand cmd = connection.CreateCommand())
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235 | {
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236 | cmd.CommandText = @"BACKUP DATABASE [" + databaseName + "] TO DISK = N'" + backUpPath + @"' WITH FORMAT, NAME = N'Requirements Flowdown Backup', STATS = 1";
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237 | cmd.CommandTimeout = 5 * 60;
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238 | cmd.ExecuteNonQuery();
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239 | }
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240 | }
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241 | } else
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242 | if (type == DatabaseType.SQLite)
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243 | {
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244 | SQLiteConnection.ClearAllPools();
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245 | CopyFile(sqliteFileName, backUpPath, progress);
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246 | } else
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247 | throw new Exception("Operation not supported.");
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248 | }
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249 |
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250 | public static void Restore(string backUpPath, Progress progress)
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251 | {
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252 | if (type == DatabaseType.MsSql)
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253 | {
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254 | progressVar = progress;
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255 | progressVar.total = 100;
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256 | using (DbConnection connection = GetConnection())
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257 | {
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258 | if (connection is SqlConnection)
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259 | {
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260 | (connection as SqlConnection).FireInfoMessageEventOnUserErrors = true;
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261 | (connection as SqlConnection).InfoMessage += OnInfoMessage;
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262 | }
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263 | connection.Open();
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264 |
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265 | using (DbCommand cmd = connection.CreateCommand())
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266 | {
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267 | cmd.CommandText = "USE master";
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268 | cmd.ExecuteNonQuery();
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269 | }
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270 |
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271 | using (DbCommand cmd = connection.CreateCommand())
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272 | {
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273 | cmd.CommandText = @"ALTER DATABASE [" + databaseName + "] SET Single_User WITH Rollback Immediate";
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274 | cmd.ExecuteNonQuery();
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275 | }
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276 |
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277 | using (DbCommand cmd = connection.CreateCommand())
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278 | {
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279 | cmd.CommandText = @"RESTORE DATABASE [" + databaseName + "] FROM DISK = N'" + backUpPath + @"' WITH REPLACE, FILE = 1, NOUNLOAD, STATS = 1";
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280 | cmd.CommandTimeout = 5 * 60;
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281 | cmd.ExecuteNonQuery();
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282 | }
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283 |
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284 | using (DbCommand cmd = connection.CreateCommand())
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285 | {
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286 | cmd.CommandText = @"ALTER DATABASE [" + databaseName + "] SET Multi_User";
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287 | cmd.ExecuteNonQuery();
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288 | }
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289 | }
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290 | } else
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291 | if (type == DatabaseType.SQLite)
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292 | {
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293 | SQLiteConnection.ClearAllPools();
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294 | CopyFile(backUpPath, sqliteFileName, progress);
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295 | } else
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296 | throw new Exception("Operation not supported.");
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297 |
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298 | }
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299 |
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300 | static private void OnInfoMessage(object sender, SqlInfoMessageEventArgs e)
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301 | {
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302 | foreach (SqlError error in e.Errors)
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303 | if ((error.Class > 10) && (error.Number != 3013))
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304 | {
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305 | Log(error.ToString());
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306 | throw new Exception(error.ToString());
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307 | }
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308 |
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309 | Match match = Regex.Match(e.Message, "(\\d{1,3}) percent");
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310 | if (match.Success)
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311 | {
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312 | string[] split = Regex.Split(e.Message, "(\\d{1,3}) percent");
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313 | progressVar.current = Int32.Parse(split[1]);
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314 | }
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315 | }
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316 |
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317 | public static DataTable ExecuteQuery(string query)
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318 | {
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319 | DataTable dbTable = null;
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320 | try
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321 | {
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322 | using (DbConnection connection = GetConnection())
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323 | using (DbCommand cmd = connection.CreateCommand())
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324 | {
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325 | connection.Open();
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326 | cmd.CommandText = query;
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327 | using (DbDataAdapter adapter = CreateDataAdapter(cmd))
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328 | {
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329 | dbTable = new DataTable();
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330 | adapter.Fill(dbTable);
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331 | }
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332 | }
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333 | }
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334 | catch (DbException ex)
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335 | {
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336 | Log("When executing query sql command:\n" + query + "\nException text: " + ex.Message);
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337 | throw new Exception("When executing query sql command:\n" + query + "\nException text: " + ex.Message);
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338 | }
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339 | return dbTable;
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340 | }
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341 |
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342 | public static void ExecuteTransaction(Action<DbTransaction> callback)
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343 | {
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344 | try
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345 | {
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346 | using (DbConnection connection = GetConnection())
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347 | {
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348 | connection.Open();
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349 | using (var transaction = connection.BeginTransaction())
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350 | {
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351 | try
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352 | {
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353 | callback(transaction);
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354 | transaction.Commit();
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355 | }
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356 | catch (Exception ex)
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357 | {
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358 | transaction.Rollback();
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359 | throw new Exception("When executing sql transaction:\nException text: " + ex.Message);
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360 | }
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361 | }
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362 | }
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363 | }
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364 | catch (DbException ex)
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365 | {
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366 | Log("When executing sql transaction:\nException text: " + ex.Message);
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367 | throw new Exception("When executing sql transaction:\nException text: " + ex.Message);
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368 | }
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369 | }
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370 |
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371 | public static void ExecuteTransactionCommand(DbTransaction transaction, string query, List<DbParameter> parameters = null )
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372 | {
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373 | using (DbCommand cmd = transaction.Connection.CreateCommand())
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374 | {
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375 | cmd.Transaction = transaction;
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376 | cmd.CommandText = query;
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377 | if (parameters != null)
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378 | {
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379 | cmd.Parameters.AddRange(parameters.ToArray());
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380 | }
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381 | cmd.ExecuteNonQuery();
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382 | }
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383 | }
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384 |
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385 | public static int ExecuteScalar(string query, List<DbParameter> parameters = null)
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386 | {
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387 | int result = 0;
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388 | try
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389 | {
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390 | using (DbConnection connection = GetConnection())
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391 | using (DbCommand cmd = connection.CreateCommand())
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392 | {
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393 | cmd.CommandText = query;
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394 | if (parameters != null)
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395 | foreach (DbParameter parameter in parameters)
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396 | cmd.Parameters.Add(parameter);
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397 | connection.Open();
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398 | object resultObject = cmd.ExecuteScalar();
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399 | if (resultObject is Int64) result = (int)Convert.ToInt64(resultObject);
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400 | else result = (int)resultObject;
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401 | }
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402 | }
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403 | catch (DbException ex)
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404 | {
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405 | Log("When executing query sql command:\n" + query + "\nException text: " + ex.Message);
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406 | throw new Exception("When executing query sql command:\n" + query + "\nException text: " + ex.Message);
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407 | }
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408 | return result;
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409 | }
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410 |
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411 | public static DbDataReader ExecuteQueryContent(string query)
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412 | {
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413 | DbDataReader dbReader = null;
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414 | try
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415 | {
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416 | using (DbConnection connection = GetConnection())
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417 | using (DbCommand cmd = connection.CreateCommand())
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418 | {
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419 | cmd.CommandText = query;
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420 | connection.Open();
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421 | dbReader = cmd.ExecuteReader();
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422 | }
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423 | }
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424 | catch (DbException ex)
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425 | {
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426 | Log("When executing query sql command:\n" + query + "\nException text: " + ex.Message);
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427 | throw new Exception("When executing query sql command:\n" + query + "\nException text: " + ex.Message);
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428 | }
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429 | return dbReader;
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430 | }
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431 |
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432 | public static void ExecuteNonQuery(string query, DbParameter parameter)
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433 | {
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434 | ExecuteNonQuery(query, new List<DbParameter> { parameter });
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435 | }
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436 |
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437 | public static void ExecuteNonQuery(string query, List<DbParameter> parameters = null)
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438 | {
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439 | try
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440 | {
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441 | using (DbConnection connection = GetConnection())
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442 | using (DbCommand cmd = connection.CreateCommand())
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443 | {
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444 | cmd.CommandText = query;
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445 | connection.Open();
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446 | if (parameters != null)
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447 | foreach (DbParameter param in parameters)
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448 | cmd.Parameters.Add(param);
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449 | int rowsAffected = cmd.ExecuteNonQuery();
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450 | }
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451 | }
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452 | catch (DbException ex)
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453 | {
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454 | Log("When executing non query sql command:\n" + query + "\nException text: " + ex.Message);
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455 | throw new Exception("When executing non query sql command:\n" + query + "\nException text: " + ex.Message);
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456 | }
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457 | }
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458 |
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459 | public static int Insert(string tableName, Dictionary<string, string> values, List<DbParameter> parameters = null)
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460 | {
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461 | string columnsText = '"' + string.Join("\",\"", values.Keys) + '"';
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462 | string valuesText = string.Join(",", values.Values);
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463 | int result = -1;
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464 | if (type == DatabaseType.MsSql)
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465 | result = ExecuteScalar("INSERT INTO " + tableName + " (" + columnsText + ") OUTPUT INSERTED.ID VALUES (" + valuesText + ")", parameters);
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466 | if (type == DatabaseType.SQLite)
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467 | result = ExecuteScalar("INSERT INTO " + tableName + " (" + columnsText + ") VALUES (" + valuesText + "); SELECT last_insert_rowid()", parameters);
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468 | return result;
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469 | }
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470 |
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471 | public static void Update(string tableName, string where, Dictionary<string, string> values, List<DbParameter> parameters = null)
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472 | {
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473 | string valuesText = "";
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474 | foreach (var value in values)
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475 | {
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476 | if (valuesText != "") valuesText += ", ";
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477 | valuesText += value.Key + '=' + value.Value;
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478 | }
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479 | ExecuteNonQuery("UPDATE " + tableName + " SET " + valuesText + " WHERE " + where, parameters);
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480 | }
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481 |
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482 | public static string GetPrimaryKeyText()
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483 | {
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484 | string result = "";
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485 | if (type == DatabaseType.MsSql) result = "int IDENTITY(1, 1) NOT NULL";
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486 | else if (type == DatabaseType.SQLite) result = "INTEGER NOT NULL";
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487 | return result;
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488 | }
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489 |
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490 | public static string GetVarCharMax()
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491 | {
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492 | string result = "";
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493 | if (type == DatabaseType.MsSql) result = "max";
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494 | else if (type == DatabaseType.SQLite) result = "2147483647";
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495 | return result;
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496 | }
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497 |
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498 | public static string GetTopLimit(int limit)
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499 | {
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500 | string result = "";
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501 | if (type == DatabaseType.MsSql) result = "TOP " + limit.ToString();
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502 | else if (type == DatabaseType.SQLite) result = "";
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503 | return result;
|
---|
504 | }
|
---|
505 |
|
---|
506 | public static string GetEndLimit(int limit)
|
---|
507 | {
|
---|
508 | string result = "";
|
---|
509 | if (type == DatabaseType.MsSql) result = "";
|
---|
510 | else if (type == DatabaseType.SQLite) result = " LIMIT " + limit.ToString();
|
---|
511 | return result;
|
---|
512 | }
|
---|
513 |
|
---|
514 | public static void CreateIndexOnColumn(string table, string column, string indexName = null)
|
---|
515 | {
|
---|
516 | if (indexName == null) indexName = table + "_" + column;
|
---|
517 | ExecuteNonQuery("CREATE INDEX " + indexName + " ON " + table + " (" + column + ")");
|
---|
518 | }
|
---|
519 | }
|
---|
520 |
|
---|
521 | public class Query
|
---|
522 | {
|
---|
523 | public string query;
|
---|
524 | public List<DbParameter> parameters;
|
---|
525 |
|
---|
526 | public Query(string query, List<DbParameter> data)
|
---|
527 | {
|
---|
528 | this.query = query;
|
---|
529 | this.parameters = data;
|
---|
530 | }
|
---|
531 | }
|
---|
532 |
|
---|
533 | public class DatabaseTransaction
|
---|
534 | {
|
---|
535 | public List<Query> queries = new List<Query>();
|
---|
536 | private List<Query> threadQueries = new List<Query>();
|
---|
537 | int queriesPerTransaction = 1000;
|
---|
538 | Thread dbThread;
|
---|
539 | bool threadTerminated;
|
---|
540 |
|
---|
541 | public void ExecuteNonQueryNonBlocking(string query)
|
---|
542 | {
|
---|
543 | ExecuteNonQueryNonBlocking(query, null);
|
---|
544 | }
|
---|
545 |
|
---|
546 | public void ExecuteNonQueryNonBlocking(string query, List<DbParameter> parameters = null)
|
---|
547 | {
|
---|
548 | queries.Add(new Query(query, parameters));
|
---|
549 | if (queries.Count > queriesPerTransaction)
|
---|
550 | {
|
---|
551 | ExecuteQueries();
|
---|
552 | }
|
---|
553 | }
|
---|
554 |
|
---|
555 | public void ExecuteQueries()
|
---|
556 | {
|
---|
557 | #if NO_TRANSACTION
|
---|
558 | foreach (Query item in queries)
|
---|
559 | {
|
---|
560 | Database.ExecuteNonQuery(item.query, item.parameters);
|
---|
561 | }
|
---|
562 | #else
|
---|
563 | lock (threadQueries)
|
---|
564 | {
|
---|
565 | threadQueries.AddRange(queries);
|
---|
566 | Monitor.Pulse(threadQueries);
|
---|
567 | }
|
---|
568 | #endif
|
---|
569 | queries.Clear();
|
---|
570 | }
|
---|
571 |
|
---|
572 | public void ThreadStart()
|
---|
573 | {
|
---|
574 | threadTerminated = false;
|
---|
575 | dbThread = new Thread(y =>
|
---|
576 | {
|
---|
577 | List<Query> localQueries;
|
---|
578 | while (!threadTerminated)
|
---|
579 | {
|
---|
580 | lock (threadQueries)
|
---|
581 | {
|
---|
582 | Monitor.Wait(threadQueries);
|
---|
583 | localQueries = new List<Query>(threadQueries);
|
---|
584 | threadQueries.Clear();
|
---|
585 | }
|
---|
586 | Database.ExecuteTransaction(x =>
|
---|
587 | {
|
---|
588 | foreach (Query item in localQueries)
|
---|
589 | {
|
---|
590 | Database.ExecuteTransactionCommand(x, item.query, item.parameters);
|
---|
591 | }
|
---|
592 | });
|
---|
593 | }
|
---|
594 | });
|
---|
595 | dbThread.Start();
|
---|
596 | }
|
---|
597 |
|
---|
598 | public void ThreadStop()
|
---|
599 | {
|
---|
600 | // Finish SQL insert thread
|
---|
601 | threadTerminated = true;
|
---|
602 | lock (threadQueries)
|
---|
603 | {
|
---|
604 | Monitor.Pulse(threadQueries);
|
---|
605 | }
|
---|
606 | dbThread.Join();
|
---|
607 | }
|
---|
608 | }
|
---|
609 | }
|
---|