collaborativePlatform/CollaborativePlatformMain/Form/MessageSubPage/SeconProjectPage.xaml

<Page x:Class="CollaborativePlatformMain.Form.MessageSubPage.SeconProjectPage"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:CollaborativePlatformMain.Form.MessageSubPage"
        mc:Ignorable="d" Title="SeconMessagePage" Width="663" Height="430"
        Loaded="Window_Loaded">
    <DockPanel>

        <StackPanel>

            <Button  Width="180" Height="25" Content="新增项目" Click="bt_addPro" HorizontalAlignment="Left" />
            <!--中间-->
            <TreeView x:Name="tr_vw"  Visibility="Visible" PreviewMouseLeftButtonUp="tv_projectLeftButtonUp"
                                  Width="180" Height="405"  HorizontalAlignment="Left" Background="WhiteSmoke">
                <TreeView.ItemTemplate>
                    <HierarchicalDataTemplate ItemsSource="{Binding SubBuildNodes}">
                        <TextBlock Text="{Binding ProjectName}" />
                    </HierarchicalDataTemplate>
                </TreeView.ItemTemplate>
            </TreeView>
        </StackPanel>

        <!--最右边-->
        <StackPanel Name="sp_info" Width="483" Margin="0 0 0 0"
                    HorizontalAlignment="Left" Visibility="Visible">

            <!--新建项目-->
            <StackPanel Name="sp_newProject" Visibility="Collapsed" >
                <Frame Name="threeNewProject" NavigationUIVisibility="Hidden"/>
            </StackPanel>

            <!--项目信息-->
            <StackPanel Name="sp_ProjectInfo" Visibility="Collapsed">
                <Frame Name="threeProInfoPage" NavigationUIVisibility="Hidden"/>
            </StackPanel>

            <!--团队成员-->
            <StackPanel Name="sp_temp" Visibility="Collapsed">
                <Frame Name="threeTempPage" NavigationUIVisibility="Hidden"/>
            </StackPanel>

            <!--工作台-->
            <StackPanel Name="sp_staging" Visibility="Collapsed">
                <Frame Name="threeStagingPage" NavigationUIVisibility="Hidden"/>
            </StackPanel>

            <!--自定义-->
            <StackPanel Name="sp_custom" Visibility="Collapsed">
                <Frame Name="threeCustomPage" NavigationUIVisibility="Hidden"/>
            </StackPanel>

        </StackPanel>

    </DockPanel>
</Page>