c# – WPF – AvalonDock – 结账凭证

发布时间：2020-12-15 05:39:35 所属栏目：百科来源：网络整理

导读：我在 WPF项目中使用AvalonDock和MVVM. 当我点击“X”(选项卡的关闭按钮)时,我的文档关闭但保留在内存中.它似乎只是隐藏的.它不会从我的Model.Documents集合中删除. 如果我添加DockingManager_DocumentClosing并尝试从集合中删除我的文档,我会在Xceed.Wpf.Ava

我在 WPF项目中使用AvalonDock和MVVM.

当我点击“X”(选项卡的关闭按钮)时,我的文档关闭但保留在内存中.它似乎只是隐藏的.它不会从我的Model.Documents集合中删除.

如果我添加DockingManager_DocumentClosing并尝试从集合中删除我的文档,我会在Xceed.Wpf.AvalonDock.Layout.LayoutContent的以下方法中收到一个Exception,因为parentAsContainer为null.

/// <summary>
/// Close the content
/// </summary>
/// <remarks>Please note that usually the anchorable is only hidden (not closed). By default when user click the X button it only hides the content.</remarks>
public void Close()
{
    var root = Root;
    var parentAsContainer = Parent as ILayoutContainer;
    parentAsContainer.RemoveChild(this);
    if (root != null)
        root.CollectGarbage();
    OnClosed();
}

有没有人知道我如何管理AvalonDock中可以从我的Model.Documents中删除的文件,以便在我点击其关闭按钮时最终被处理掉？

供参考：这是我的AvalonDock的XAML：

<avalonDock:DockingManager
    x:Name="DockingManager" 
    DocumentsSource="{Binding DocumentItems}"  
    ActiveContent="{Binding ActiveMainWindowViewModel,Converter={StaticResource RestrictedClassConverter},ConverterParameter={x:Type multiSimAnalysis:MainWindowViewModel},Mode=TwoWay}"
    DocumentClosing="DockingManager_DocumentClosing"
    ActiveContentChanged="DockingManager_ActiveContentChanged">

  <avalonDock:DockingManager.LayoutItemContainerStyleSelector>
    <pane:PanesStyleSelector>
      <pane:PanesStyleSelector.MainWindowViewLcStyle>
        <Style TargetType="{x:Type avalonDock:LayoutItem}">
          <Setter Property="Title" Value="{Binding Model.Title}"/>
          <Setter Property="ToolTip" Value="{Binding Model.Title}"/>
          <Setter Property="CloseCommand" Value="{Binding Model.CloseCommand}"/>
          <Setter Property="IconSource" Value="{Binding Model.IconSource}"/>
          <Setter Property="IsSelected" Value="{Binding Model.IsSelected,Mode=TwoWay}"/>
          <Setter Property="IsActive" Value="{Binding Model.IsActive,Mode=TwoWay}"/>
          <Setter Property="ContentId" Value="{Binding Model.ContentId}"/>
        </Style>
      </pane:PanesStyleSelector.MainWindowViewLcStyle>
    </pane:PanesStyleSelector>
  </avalonDock:DockingManager.LayoutItemContainerStyleSelector>

  <avalonDock:DockingManager.LayoutItemTemplateSelector>
    <multiSimAnalysis:PanesTemplateSelector>
      <multiSimAnalysis:PanesTemplateSelector.MainWindowLcTemplate>
        <DataTemplate>
          <multiSimAnalysis:MainWindowViewLc /> 
        </DataTemplate>
      </multiSimAnalysis:PanesTemplateSelector.MainWindowLcTemplate>
    </multiSimAnalysis:PanesTemplateSelector>
  </avalonDock:DockingManager.LayoutItemTemplateSelector>

  <avalonDock:DockingManager.Theme>
    <avalonDock:VS2010Theme/>
  </avalonDock:DockingManager.Theme>
  <avalonDock:LayoutRoot>
    <avalonDock:LayoutPanel Orientation="Horizontal">
      <avalonDock:LayoutAnchorablePane DockWidth="400">
        <avalonDock:LayoutAnchorable Title="Scope(s) selection" x:Name="PanelScopeSelection" IsVisible="True">
          <scopeSelection:UserControlSelectStudyScope x:Name="ToolScopeSelection"/>
        </avalonDock:LayoutAnchorable>
      </avalonDock:LayoutAnchorablePane>
      <avalonDock:LayoutDocumentPane/>
      <avalonDock:LayoutAnchorablePane DockWidth="150">
        <avalonDock:LayoutAnchorable Title="Properties" x:Name="PanelScopePropertyGrid">
          <!--<multiSimAnalysis:UserControlPropertyGrid x:Name="ToolPropertyGrid"  />-->
          <xctk:PropertyGrid x:Name="ToolPropertyGrid" SelectedObject="{Binding ActiveObject}" />
        </avalonDock:LayoutAnchorable>
      </avalonDock:LayoutAnchorablePane>
    </avalonDock:LayoutPanel>
  </avalonDock:LayoutRoot>
</avalonDock:DockingManager>

解决方法

我实际上找到了一个不可接受的解决方法.
真是扭曲了.

我只是作为参考.应该有一个干净的方法来做到这一点.

// ************************************************************************
    private void DockingManager_DocumentClosing(object sender,Xceed.Wpf.AvalonDock.DocumentClosingEventArgs e)
    {
        e.Document.CanClose = false;

        DocumentModel documentModel = e.Document.Content as DocumentModel;
        if (documentModel != null)
        {
            Dispatcher.BeginInvoke(new Action(() => this.Model.DocumentItems.Remove(documentModel)),DispatcherPriority.Background);
        }
    }

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!