/// <summary>
/// 构造函数
/// </summary>
/// <param name="dbProvider"></param>
public Database(DbProvider dbProvider)
{
this.dbProvider = dbProvider;
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="dbProvider"></param>
public Database(DbProvider dbProvider)
{
this.dbProvider = dbProvider;
}
/// <summary>
/// 创建数据库事件提供程序
/// </summary>
/// <param name="assemblyName">Name of the assembly.</param>
/// <param name="className">Name of the class.</param>
/// <param name="connectionString">The conn STR.</param>
/// <returns>The db provider.</returns>
public static DbProvider CreateDbProvider(string assemblyName, string className, string connectionString, DatabaseType?databaseType)
{
Check.Require(connectionString, "connectionString", Check.NotNullOrEmpty);
if (connectionString.IndexOf("microsoft.jet.oledb", StringComparison.OrdinalIgnoreCase) > -1 || connectionString.IndexOf(".db3", StringComparison.OrdinalIgnoreCase) > -1)
{
Check.Require(connectionString.IndexOf("data source", StringComparison.OrdinalIgnoreCase) > -1, "ConnectionString的格式有错误，请查证！");
string mdbPath = connectionString.Substring(connectionString.IndexOf("data source", StringComparison.OrdinalIgnoreCase) + "data source".Length + 1).TrimStart(' ', '=');
if (mdbPath.ToLower().StartsWith("|datadirectory|"))
{
mdbPath = AppDomain.CurrentDomain.BaseDirectory.TrimEnd('\\') + "\\App_Data" + mdbPath.Substring("|datadirectory|".Length);
}
else if (connectionString.StartsWith("./") || connectionString.EndsWith(".\\"))
{
connectionString = connectionString.Replace("/", "\\").Replace(".\\", AppDomain.CurrentDomain.BaseDirectory.TrimEnd('\\') + "\\");
}
connectionString = connectionString.Substring(0, connectionString.ToLower().IndexOf("data source")) + "Data Source=" + mdbPath;
}
//如果是~则表示当前目录
if (connectionString.Contains("~/") || connectionString.Contains("~\\"))
{
connectionString = connectionString.Replace("/", "\\").Replace("~\\", AppDomain.CurrentDomain.BaseDirectory.TrimEnd('\\') + "\\");
}
//by default, using sqlserver db provider
if (string.IsNullOrEmpty(className))
{
className = typeof(SqlServer.SqlServerProvider).ToString();
if (databaseType == null)
{
databaseType = DatabaseType.SqlServer;
}
}
else if (string.Compare(className, "System.Data.SqlClient", true) == 0 || string.Compare(className, "Dos.ORM.SqlServer", true) == 0)
{
className = typeof(SqlServer.SqlServerProvider).ToString();
if (databaseType == null)
{
databaseType = DatabaseType.SqlServer;
}
}
else if (string.Compare(className, "Dos.ORM.SqlServer9", true) == 0 || className.IndexOf("SqlServer9", StringComparison.OrdinalIgnoreCase) >= 0 || className.IndexOf("sqlserver2005", StringComparison.OrdinalIgnoreCase) >= 0 || className.IndexOf("sql2005", StringComparison.OrdinalIgnoreCase) >= 0)
{
className = typeof(SqlServer9.SqlServer9Provider).ToString();
if (databaseType == null)
{
databaseType = DatabaseType.SqlServer9;
}
}
else if (className.IndexOf("oracle", StringComparison.OrdinalIgnoreCase) >= 0)
{
className = typeof(Oracle.OracleProvider).ToString();
if (databaseType == null)
{
databaseType = DatabaseType.Oracle;
}
}
else if (className.IndexOf("access", StringComparison.OrdinalIgnoreCase) >= 0)
{
className = typeof(MsAccess.MsAccessProvider).ToString();
if (databaseType == null)
{
databaseType = DatabaseType.MsAccess;
}
}
else if (className.IndexOf("mysql", StringComparison.OrdinalIgnoreCase) >= 0)
{
className = "Dos.ORM.MySql.MySqlProvider";
assemblyName = "Dos.ORM.MySql";
if (databaseType == null)
{
databaseType = DatabaseType.MySql;
}
}
else if (className.IndexOf("sqlite", StringComparison.OrdinalIgnoreCase) >= 0)
{
className = "Dos.ORM.Sqlite.SqliteProvider";
assemblyName = "Dos.ORM.Sqlite";
if (databaseType == null)
{
databaseType = DatabaseType.Sqlite3;
}
}
string cacheKey = string.Concat(assemblyName, className, connectionString);
if (providerCache.ContainsKey(cacheKey))
{
return(providerCache[cacheKey]);
}
else
{
System.Reflection.Assembly ass;
if (assemblyName == null)
{
ass = typeof(DbProvider).Assembly;
}
else
{
ass = System.Reflection.Assembly.Load(assemblyName);
}
DbProvider retProvider = ass.CreateInstance(className, false, System.Reflection.BindingFlags.Default, null, new object[] { connectionString }, null, null) as DbProvider;
if (retProvider != null && databaseType != null)
{
retProvider.DatabaseType = databaseType.Value;
}
providerCache.Add(cacheKey, retProvider);
return(retProvider);
}
}
