ต้องการลิ๊งไปอีกหน้า From โดยเช็คข้อมูลในฐานข้อมูลว่ามีหรือไม่

public enum EnumConnstring
       public enum EnumConnstring
        {
            SQL_Server_ODBC,SQL_Server_OLEDB,
            Excel_ODBC, Excel_OLEDB, 
            Text_ODBC, Text_OLEDB,
            DBF_FoxPro_ODBC,DBF_FoxPro_OLEDB,
            Access_ODBC,Access_OLEDB,
            Oracle_ODBC,Oracle_OLEDB,
            MySQL_ODBC,MySQL_OLEDB
        };
public static System.Data.DataTable GetTableForm(string _SQL, string strConn, EnumConnectionType ConnectionType )

        {
            
            System.Data.DataSet ds = new System.Data.DataSet();
            switch (ConnectionType)
            {
                case EnumConnectionType.ODBC:
                    System.Data.Odbc.OdbcConnection conn1 = new System.Data.Odbc.OdbcConnection(strConn);
                    conn1.Open();
                    System.Data.Odbc.OdbcDataAdapter adapter1 = new System.Data.Odbc.OdbcDataAdapter(_SQL, conn1);
                    adapter1.Fill(ds);
                    break;
                case EnumConnectionType.OLEDB:
                    System.Data.OleDb.OleDbConnection conn2 = new  System.Data.OleDb.OleDbConnection(strConn);
                    conn2.Open();
                    System.Data.OleDb.OleDbDataAdapter adapter2 = new  System.Data.OleDb.OleDbDataAdapter(_SQL, conn2);
                    adapter2.Fill(ds);
                    break;
                case EnumConnectionType.SqlClient:
                    System.Data.SqlClient.SqlConnection conn3 = new  System.Data.SqlClient.SqlConnection(strConn);
                    conn3.Open();
                    System.Data.SqlClient.SqlDataAdapter adapter3 = new  System.Data.SqlClient.SqlDataAdapter(_SQL, conn3);
                    adapter3.Fill(ds);

                    break;
            }

            return ds.Tables[0];

        }