删除Datagrid行（WPF）

主窗口应用程序具有数据网格，该数据网格从数据库填充。（从数据表中绑定数据网格）。删除Datagrid行（WPF）

数据网格具有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>

当与数据表poulated窗口加载，数据网格的时间。

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;

下面的删除按钮，单击代码：

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被抛出

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.

请任何一个建议的任何想法克服这种错误。谢谢。

来源

2016-09-29 zooha

而不是做的：

grd.Items.RemoveAt(grd.SelectedIndex);

你应该从底层源移除。

尝试从数据表中删除它，它将从视图中消失。采用MVVM方法可以让您更轻松，因为您永远不需要触摸UI。

来源

2016-09-29 04:40:53 Kelly

要删除从电网的项目，你可以试试这个方法

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; 
      } 
     }

来源

2016-09-29 06:42:28

删除Datagrid行（WPF）

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