删除数据网格行(WPF)

本文关键字：WPF 网格 数据 数据网 删除 | 更新日期: 2023-09-27 18:09:16

应用程序的主窗口有数据网格，它是从数据库填充的。(从数据表中绑定数据网格).

数据网格有3列-

<DataGrid.Columns>
<DataGridTextColumn Header= Id" Binding="{Binding Id}" Width="250"></DataGridTextColumn>
<DataGridTextColumn Header= Name" Binding="{Binding Name}" Width="250"></DataGridTextColumn>
<DataGridTemplateColumn Header="Action" Width="*">
         <DataGridTemplateColumn.CellTemplate>
         <DataTemplate>
         <StackPanel Orientation="Horizontal">
             <Button Name="btnEdit" Content="Edit" Width="90" Click="btnEdit_Click" />
             <Button Name="btnDelete" Content="Delete" Width="90" Click="btnDelete_Click" />
         </StackPanel>
        </DataTemplate>
       </DataGridTemplateColumn.CellTemplate>
      </DataGridTemplateColumn>
</DataGrid.Columns>

当窗口加载时，数据网格填充了数据表。

    DataTable o_DataTable = new DataTable();
    o_DataTable.Columns.Add("Id", typeof(string));
    o_DataTable.Columns.Add("Name", typeof(string));
            o_DataTable.Rows.Add("1","A");
            o_DataTable.Rows.Add("2","B");
        this.grd.ItemsSource = o_DataTable.DefaultView;

下面的代码删除按钮点击:

private void Button_Click(object sender, RoutedEventArgs e)
        {
            object item = grd.SelectedItem;
            string CourseName = (grd.SelectedCells[0].Column.GetCellContent(item) as TextBlock).Text;
            MessageBoxResult result = MessageBox.Show("Are you sure you want to delete the course " + CourseName + "?");
            if (result == MessageBoxResult.OK)
            {
                grd.Items.RemoveAt(grd.SelectedIndex);
            }
        }

当我点击删除按钮异常已经抛出

An unhandled exception of type 'System.InvalidOperationException' occurred in PresentationFramework.dll
Additional information: Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead.

请任何人建议任何方法来克服这个错误。谢谢你。

删除数据网格行(WPF)

如果你想从网格中删除项目，你可以尝试这个方法

 private void btnDelete_Click(object sender, RoutedEventArgs e)
        {
            object item = grd.SelectedItem;
            string CourseName = (grd.SelectedCells[0].Column.GetCellContent(item) as TextBlock).Text;
            MessageBoxResult result = System.Windows.MessageBox.Show("Are you sure you want to delete the course " + CourseName + "?");
            if (result == MessageBoxResult.OK)
            {
                var itemSource = grd.ItemsSource as DataView;
                itemSource.Delete(grd.SelectedIndex);
                grd.ItemsSource = itemSource;
            }
        }

而不是:

grd.Items.RemoveAt(grd.SelectedIndex);

您应该从底层源代码中删除。

尝试从数据表中删除它，它将从视图中消失。采用MVVM方法使其更容易，因为您永远不需要触摸UI。

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