【发布时间】：2017-09-25 00:44:26
【问题描述】：
我有一个DataGrid，每个DataGridRow 都有行详细信息，其中包含几个控件。
我想要的是，如果在行详细信息中单击任何内容：
- 不选择行，或更准确地说，
- 更改现有的DataGrid 选择。
我在考虑如何在行为中处理 PreviewMouseDown 和 MouseDown 事件，以某种方式使 DataGrid 跳过选择过程，但不知道如何继续。
最终我将在详细信息中添加一个 TabControl 以及更多信息，因此我也不希望单击 TabItem 来更改 DataGrid 的现有选择。
是否有办法在网格“DetailsContainer”级别启动 PreviewMouseDown 隧道，并在网格“DetailsContainer”级别停止 MouseDown 冒泡
<DataGrid Name="dgAudit"
CanUserReorderColumns="False"
CanUserAddRows="False"
CanUserDeleteRows="False"
CanUserResizeColumns="False"
CanUserResizeRows="False"
CanUserSortColumns="False"
IsReadOnly="True"
ItemsSource="{Binding GEOM_ASSET_OC_LIST}"
VirtualizingPanel.ScrollUnit="Pixel"
RowDetailsVisibilityMode="Visible"
>
<i:Interaction.Behaviors>
<behaviors:DataGridBehaviors />
</i:Interaction.Behaviors>
<DataGrid.Columns>
<DataGridTextColumn Header="Asset ID" Binding="{Binding ASSET_ID}" Width="200" />
<DataGridTextColumn Header="Asset Type" Binding="{Binding ASSET_TYPE}" Width="200" />
<DataGridTextColumn Header="Last Update By" Binding="{Binding LAST_UPDATE_BY}" Width="150" />
<DataGridTextColumn Header="Last Update Date" Binding="{Binding LAST_UPDATE_DATETIME, StringFormat=\{0:dd.MM.yy HH:mm:ss tt\}}" Width="150" />
</DataGrid.Columns>
<DataGrid.RowDetailsTemplate>
<DataTemplate>
<Grid Name="DetailsContainer">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<TextBlock Name Text="{Binding Notes}" Width="400" HorizontalAlignment="Left" TextWrapping="Wrap"/>
<Button Content="Button" Grid.Column="1" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
</Grid>
</DataTemplate>
</DataGrid.RowDetailsTemplate>
</DataGrid>
只是一个空行为的快速模拟
public class DataGridBehaviors : Behavior<DataGrid>
{
protected override void OnAttached()
{
base.OnAttached();
this.AssociatedObject.MouseDown += DataGrid_MouseDown;
this.AssociatedObject.PreviewMouseDown += DataGrid_PreviewMouseDown;
}
protected override void OnDetaching()
{
this.AssociatedObject.PreviewMouseDown -= DataGrid_PreviewMouseDown;
this.AssociatedObject.MouseDown -= DataGrid_MouseDown;
base.OnDetaching();
}
private void DataGrid_MouseDown(object sender, MouseButtonEventArgs e)
{
}
private void DataGrid_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
DependencyObject obj = (DependencyObject)e.OriginalSource;
DataGridDetailsPresenter RowsDetails = FindParent<DataGridDetailsPresenter>(obj);
if (RowsDetails != null)
{
//Skip over selection, maybe temporarily removed native selection handler???
}
}
public static T FindParent<T>(DependencyObject child) where T : DependencyObject
{
//get parent item
DependencyObject parentObject = VisualTreeHelper.GetParent(child);
//we've reached the end of the tree
if (parentObject == null) return null;
//check if the parent matches the type we're looking for
T parent = parentObject as T;
if (parent != null)
return parent;
else
return FindParent<T>(parentObject);
}
private static T GetVisualChild<T>(DependencyObject parent) where T : Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
child = v as T;
if (child == null)
{
child = GetVisualChild<T>(v);
}
if (child != null)
{
break;
}
}
return child;
}
}
【问题讨论】：
-
可以将只读属性设为“true”