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Old March 27th, 2006, 05:37 AM
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Default Error occur when Add a DataRow[] into a DataTable

 Dear Programer,

I kept received the error message "Object reference not set to an instance of an object", pls help!!! :(

I added "//error occur" in the line. Thanks a lot!

            DataTable* selectedTable = new DataTable();
            selectedTable = this->localDB->Tables->Item[S"BusinessCard"]->Clone();
            selectedTable = localDB->Tables->Item[S"SelectedTable"];
            DataRow* selectedRow[];

            selectedRow = this->localDB->Tables->Item[S"BusinessCard"]->Select("Industry='Education'", "Index Desc");
            for (int i=0; i<selectedRow->Length; i++)
            {
                selectedRow[i] = localDB->Tables->Item[S"selectedTable"]->NewRow(); //error occur
                localDB->Tables->Item[S"selectedTable"]->Rows->Add(selectedRow[i]); //error occur
            }
            this->dataGrid1->DataSource = this->localDB;
            this->dataGrid1->DataMember = S"SelectedTable";






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