/// <summary>
/// 创建连接
/// </summary>
/// <param name="dataBaseType"></param>
/// <returns></returns>
public static DbConnection CreateDbConnection(DataBaseType dataBaseType)
{
DbConnection dbConnection = null;
var dllPath = "";
var dllName = "";
var dbConnectionType = "";
if (dataBaseType == DataBaseType.SqlServer)
{
return(new SqlConnection());
}
switch (dataBaseType)
{
case DataBaseType.MySql:
dllName = "MySql.Data.dll";
dbConnectionType = "MySql.Data.MySqlClient.MySqlConnection";
break;
case DataBaseType.SQLite:
dllName = "System.Data.SQLite.DLL";
dbConnectionType = "System.Data.SQLite.SQLiteConnection";
break;
case DataBaseType.Oracle:
dllName = "Oracle.DataAccess.dll";
dbConnectionType = "Oracle.DataAccess.Client.OracleConnection";
break;
case DataBaseType.Postgresql:
dllName = "Npgsql.dll";
dbConnectionType = "Npgsql.NpgsqlConnection";
break;
}
dllPath = AppDomain.CurrentDomain.BaseDirectory + "bin\\" + dllName;
Directory.CreateDirectory(AppDomain.CurrentDomain.BaseDirectory + "bin\\");
if (!File.Exists(dllPath))
{
switch (dataBaseType)
{
case DataBaseType.MySql:
File.WriteAllBytes(dllPath, Properties.Resources.MySql_Data);
break;
case DataBaseType.Oracle:
if (Environment.Is64BitOperatingSystem)
{
File.WriteAllBytes(dllPath, Properties.Resources.Oracle_DataAccess_64);
}
else
{
File.WriteAllBytes(dllPath, Properties.Resources.Oracle_DataAccess_86);
}
break;
case DataBaseType.Postgresql:
File.WriteAllBytes(dllPath, Properties.Resources.Npgsql);
break;
case DataBaseType.SQLite:
File.WriteAllBytes(dllPath, Properties.Resources.System_Data_SQLite);
break;
default:
throw new FileNotFoundException(RS.STRING_DB_DLL_NOT_EXISTS(dataBaseType));
}
}
var connectionType = Assembly.LoadFile(dllPath).GetType(dbConnectionType);
dbConnection = (DbConnection)Activator.CreateInstance(connectionType);
return(dbConnection);
}
