Question

尝试在repositoryItemGridLookUpEdit1_EditValueChanged事件中从gridview获取单元格值。但是我只得到null值然后错误显示在这一行中“对象引用未设置为对象的实例”。

如何在EditValueChanged事件中从gridview获取特定行的单元格值？

我的代码就是这个

 private void repositoryItemGridLookUpEdit1_EditValueChanged(object sender, EventArgs e)
    {
        GridLookUpEdit LookupEdit = sender as GridLookUpEdit;
        DataRowView SelectedDataRow = (DataRowView)LookupEdit.GetSelectedDataRow();



        gridView1.SetFocusedRowCellValue("Description", SelectedDataRow["ProductDescription"]);
        gridView1.SetFocusedRowCellValue("UoM", SelectedDataRow["UnitofMeasure"]);
        gridView1.SetFocusedRowCellValue("Quantity", SelectedDataRow["DefaultQuantity"]);
        gridView1.SetFocusedRowCellValue("Price", SelectedDataRow["MRPPrice"]);
        gridView1.SetFocusedRowCellValue("TaxInPercentage", SelectedDataRow["Taxid1"]);
        gridView1.SetFocusedRowCellValue("ProductKind", SelectedDataRow["ProductKind"]);

        getdisc = LookupEdit.EditValue.ToString(); // get display value & pass to comparision to find Discound

        object productkin = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["ProductDescrption"]);

        string productkind = productkin.ToString(); // Error Object reference not set to instance of object

        MessageBox.Show(productkind, "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }

帮帮我？

Answer 1

正如Corak注意到的那样：获取行单元格值时出现错字错误（缺少“i”）：

object productkin = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["ProductDescrption"]);

由于“ProductDescrption”列不存在，变量productkind为null。用以下内容替换此行：

object productkin = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, gridView1.Columns["ProductDescription"]);

对象引用未设置为c＃上的对象错误的实例

1 个答案: