如何在 PreparingCellForEdit Silverlight Datagrid 中获取隐藏列控件值

Question

如何在PreparingCellForEdit Silverlight Datagrid中获取隐藏列控件值

代码如下：

Private Sub TaskDataGrid_LoadingRow(ByVal sender As System.Object, ByVal e As 
System.Windows.Controls.DataGridRowEventArgs)

    Dim row As DataGridRow = e.Row 
    Dim cellContent As FrameworkElement = TaskDataGrid.Columns(8).GetCellContent(e.Row)

    Dim cboLabValidated As ComboBox = CType(cellContent.FindName("cboLabValidated"), ComboBox)
    Dim ViewModel As New NonFirmWareNewRequestViewModel()
    If cboLabValidated IsNot Nothing Then
        cboLabValidated.ItemsSource = ViewModel.YesNoValues
    End If 
    TaskDataGrid.Columns(1).Visibility = Visibility.Collapsed
End Sub

在上面的代码中，我隐藏了 LoadingRow 事件中的第 1 列，需要在 PreparingCellForEdit 中获取该列的值

PreparingCellForEdit 的代码如下：

Dim fe As FrameworkElement = TaskDataGrid.Columns(5).GetCellContent(e.Row)
                    Dim fe1 As FrameworkElement = TaskDataGrid.Columns(1).GetCellContent(e.Row)

                    Dim gridCmbo As Grid = DirectCast(fe, Grid)

                    Dim gridCmbo1 As Grid = DirectCast(fe1, Grid)

                    Dim lbltaskId As Label = CType(gridCmbo1.FindName("lbltaskId"), Label)

                    Dim cboCompVerSel As ComboBox = CType(gridCmbo.FindName("cboCompVerSel"), ComboBox)

                    Dim lblCompVer As Label = CType(gridCmbo.FindName("lblCompVer"), Label)

我正在使用标签控件显示第 1 列，并且我正在识别标签控件对象但内容变为空..

Answer 1

一切正常

1) 在 Loading Row 事件中我们不应该隐藏 Column，如果隐藏列则无法从列中获取值，让数据在 LoadingRow 事件中首先加载。

2) 隐藏Selection changed事件代码中的列如下：

 Private Sub TaskDataGrid_SelectionChanged(ByVal sender As System.Object, ByVal e As System.Windows.Controls.SelectionChangedEventArgs) Handles TaskDataGrid.SelectionChanged
        TaskDataGrid.Columns(1).Visibility = Visibility.Collapsed 
    End Sub

一旦加载 Row，此事件将在 LoadingRow Datagrid 事件或 PreparingCellForEdit 事件之后触发，我们可以隐藏列并可以在任何你想要的地方获取值。如果你隐藏在 LoadingRow 事件中而不加载数据，你将无法获得值Datagrid 模板或数据列中的那个控件。