DbType与Type之间的转换

1. DbType ==>Type:

public static DbType TypeToDbType(Type t)

{

	DbType dbt;

	try

	{

		dbt = (DbType)Enum.Parse(typeof(DbType), t.Name);

	}

	catch

	{

		dbt = DbType.Object;

	}

	return dbt;

} 

 

 

2. Type ==> DbType:

static Type ConvertType(DbType dbType)

{

	Type toReturn = typeof(DBNull);



	switch (dbType)

	{

		case DbType.UInt64:

			toReturn = typeof(UInt64);

			break;



		case DbType.Int64:

			toReturn = typeof(Int64);

			break;



		case DbType.Int32:

			toReturn = typeof(Int32);

			break;



		case DbType.UInt32:

			toReturn = typeof(UInt32);

			break;



		case DbType.Single:

			toReturn = typeof(float);

			break;



		case DbType.Date:

		case DbType.DateTime:

		case DbType.Time:

			toReturn = typeof(DateTime);

			break;



		case DbType.String:

		case DbType.StringFixedLength:

		case DbType.AnsiString:

		case DbType.AnsiStringFixedLength:

			toReturn = typeof(string);

			break;



		case DbType.UInt16:

			toReturn = typeof(UInt16);

			break;



		case DbType.Int16:

			toReturn = typeof(Int16);

			break;



		case DbType.SByte:

			toReturn = typeof(byte);

			break;



		case DbType.Object:

			toReturn = typeof(object);

			break;



		case DbType.VarNumeric:

		case DbType.Decimal:

			toReturn = typeof(decimal);

			break;



		case DbType.Currency:

			toReturn = typeof(double);

			break;



		case DbType.Binary:

			toReturn = typeof(byte[]);

			break;



		case DbType.Double:

			toReturn = typeof(Double);

			break;



		case DbType.Guid:

			toReturn = typeof(Guid);

			break;



		case DbType.Boolean:

			toReturn = typeof(bool);

			break;

	}



	return toReturn;

}