带有复选框解析的TreeViewItem [英] TreeViewItem with Checkbox parsing

问题描述

Hi all,
I have a TreeView whereby each item has a CheckBox for selection:
<Style TargetType="{x:Type TreeViewItem}">
      <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate TargetType="{x:Type TreeViewItem}">
            <Grid>
              <Grid.RowDefinitions>
                <RowDefinition Height="auto" />
                <RowDefinition Height="auto" />
              </Grid.RowDefinitions>
              <Grid.ColumnDefinitions>
                <ColumnDefinition Width="auto" />
                <ColumnDefinition Width="auto" />
                <ColumnDefinition Width="*" />
              </Grid.ColumnDefinitions>
              <ToggleButton x:Name="Expander" Content="+" Grid.Column="0" Grid.Row="0" IsChecked="{Binding Path=IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"

                     ClickMode="Press" Style="{StaticResource ResourceKey=ExpanderStyle}" VerticalAlignment="Top">
              </ToggleButton>
              <CheckBox Margin="3" Grid.Row="0" Grid.Column="1" IsChecked="False" VerticalAlignment="Bottom" Name="chkTreeViewItem" Checked="chkTreeViewItem_Checked">
              </CheckBox>
              <ContentPresenter x:Name="PART_Header"

                       ContentSource="Header"

                       Grid.Row="0"

                       Grid.Column="2"

                       HorizontalAlignment="Left"

                       VerticalAlignment="Center"/>
              <ItemsPresenter x:Name="ItemsHost"

                      Grid.Row="1"

                      Grid.Column="1"

                      Grid.ColumnSpan="2"

                      VerticalAlignment="Bottom"/>
            </Grid>
            <ControlTemplate.Triggers>
              <Trigger Property="IsExpanded" Value="False">
                <Setter TargetName="ItemsHost"

                    Property="Visibility"

                    Value="Collapsed" />
              </Trigger>
              <Trigger Property="HasItems" Value="False">
                <Setter TargetName="Expander"

                    Property="Visibility"

                    Value="Hidden" />
              </Trigger>
            </ControlTemplate.Triggers>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
    </Style>

Now I have an event for the checkbox which I need to do two things.
Firstly, I require it to check the checkbox of it's parent nodes. I've been trying to use the VisualTreeHelper.GetParent for this. I can find the TreeViewItems above it, but am struggling to then access their checkboxes to check them.
Secondly, I then need to parse the entire TreeView and check any nodes that match the original selection (and repeat the above step for each of those)

Here's my TreeView:
<TreeView Height="289" HorizontalAlignment="Left" Margin="10,10,0,0" Name="tvSettings" VerticalAlignment="Top" Width="265" >
                  <TreeViewItem Header="IIS-ISAPIFilter">
              <TreeViewItem Header="ADFS-WebAgentToken" />
              <TreeViewItem Header="IIS-ASPNET">
                <TreeViewItem Header="ADFS-FederationService" />
                <TreeViewItem Header="ADFS-FederationServiceProxy" />
                <TreeViewItem Header="ADFS-WebAgentClaims">
                  <TreeViewItem Header="RMS-Federation" />
                </TreeViewItem>
                <TreeViewItem Header="RightsManagementServices">
                  <TreeViewItem Header="RMS-Federation" />
                </TreeViewItem>
                <TreeViewItem Header="WebAccess" />
              </TreeViewItem>
              <TreeViewItem Header="Printing-InternetPrinting-Server" />
            </TreeViewItem>
            <TreeViewItem Header="IIS-NetFxExtensibility">
              <TreeViewItem Header="ADFS-WebAgentToken" />
              <TreeViewItem Header="BITSExtensions-Upload" />
              <TreeViewItem Header="CertificateEnrollmentPolicyServer" />
              <TreeViewItem Header="CertificateEnrollmentServer" />
              <TreeViewItem Header="IIS-ASPNET">
                <TreeViewItem Header="ADFS-FederationService" />
                <TreeViewItem Header="ADFS-FederationServiceProxy" />
                <TreeViewItem Header="ADFS-WebAgentClaims">
                  <TreeViewItem Header="RMS-Federation" />
                </TreeViewItem>
                <TreeViewItem Header="RightsManagementServices">
                  <TreeViewItem Header="RMS-Federation" />
                </TreeViewItem>
                <TreeViewItem Header="WebAccess" />
              </TreeViewItem>
              <TreeViewItem Header="MSMQ-HTTP" />
              <TreeViewItem Header="Printing-InternetPrinting-Server" />
              <TreeViewItem Header="RightsManagementServices">
                <TreeViewItem Header="RMS-Federation" />
              </TreeViewItem>
              <TreeViewItem Header="WCF-HTTP-Activation">
                <TreeViewItem Header="CertificateEnrollmentPolicyServer" />
                <TreeViewItem Header="CertificateEnrollmentServer" />
              </TreeViewItem>
              <TreeViewItem Header="WebAccess" />
            </TreeViewItem>
            <TreeViewItem Header="IIS-ServerSideIncludes" />
          </TreeViewItem>
          <TreeViewItem Header="IIS-CommonHttpFeatures">
            <TreeViewItem Header="IIS-DefaultDocument">
              <TreeViewItem Header="ADFS-FederationService" />
              <TreeViewItem Header="ADFS-FederationServiceProxy" />
              <TreeViewItem Header="BITSExtensions-Upload" />
              <TreeViewItem Header="CertificateEnrollmentPolicyServer" />
              <TreeViewItem Header="CertificateEnrollmentServer" />
              <TreeViewItem Header="HCAP-Server" />
</TreeView>

I'm really struggling here so any help or direction will be really appreciated.

Thanks,

Jib.

推荐答案

I was getting stuck when trying to check all parent nodes of any given checked node. I could navigate up the tree and find the treeviewitems, however I was then struggling to check the associated checkbox for the parent nodes.

Anyway, this article really helped:

Article about CheckBoxes in a WPF TreeView

谢谢，

臂架

I was getting stuck when trying to check all parent nodes of any given checked node. I could navigate up the tree and find the treeviewitems, however I was then struggling to check the associated checkbox for the parent nodes.

Anyway, this article really helped:

Article about CheckBoxes in a WPF TreeView

Thanks,

Jib

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