public DataTable SelectQuery(string sqlstring)
{
try
{
DataTable _dt = new DataTable();
sqlhelper.OpenConn();
sqlhelper._adapter.SelectCommand.CommandText = sqlstring;
sqlhelper._adapter.Fill(_dt);
sqlhelper.CloseConn();
return(_dt);
}
catch (Exception ex)
{
sqlhelper.CloseConn();
return(null);
}
}