WPF-AvalonDock-关闭文档 [英] WPF - AvalonDock - Closing Document

问题描述

我在WPF项目中将AvalonDock与MVVM一起使用.

I use AvalonDock with MVVM in a WPF project.

当我点击"X"(选项卡的关闭"按钮)时，我的文档关闭，但仍保留在内存中.似乎它只是隐藏的.不会将其从我的Model.Documents收藏夹中删除.

When I hit the "X" (Close button of the tab) my document closes but stays in memory. It seems that it is only hidden. It is not removed from my Model.Documents collection.

如果我添加DockingManager_DocumentClosing并尝试从集合中删除我的文档，则由于parentAsContainer为空，因此在以下Xceed.Wpf.AvalonDock.Layout.LayoutContent方法中会收到异常.

If I add DockingManager_DocumentClosing and try to remove my document from the collection, I receive an Exception in the following method of Xceed.Wpf.AvalonDock.Layout.LayoutContent because parentAsContainer is 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();
}

有人知道我该如何在AvalonDock中管理可以从我的Model.Documents中删除的文档，以便在我按下其Close按钮时最终将其丢弃?

Does anybody know how I could manage document in AvalonDock that can be removed from my Model.Documents in order to be eventually be disposed when I hit its Close button?

供参考:这是我的AvalonDock的XAML:

For reference: This is my XAML of the AvalonDock:

<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>

推荐答案

我实际上找到了无法接受的解决方法. 真的很扭曲.

I actually find an unacceptable workaround. It is really twisted.

我仅作为参考.应该有一种干净的方法.

I only give that as reference. There should be a clean way to do it.

    // ************************************************************************
    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);
        }
    }

这篇关于WPF-AvalonDock-关闭文档的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！