WPF的TreeView带连接线样式[免费]

TreeView原始样式是不带连接的，本资源通过Style重写TreeViewItem样式，实现带连接线样式，这里提供源代码希望对各位有帮助。

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;

namespace WindowsApplication3
{
    /// 

    /// App.xaml 的交互逻辑
    /// 

    public partial class App : Application
    {
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     51712  2017-09-24 19:54  TreeViewConnectingLines\.vs\WindowsApplication3\v14\.suo

     文件        189  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\App.config

     文件        392  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\App.xaml

     文件        346  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\App.xaml.cs

     文件      15360  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\bin\Debug\WindowsApplication3.exe

     文件        189  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\bin\Debug\WindowsApplication3.exe.config

     文件      26112  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\bin\Debug\WindowsApplication3.pdb

     文件      22696  2017-09-24 19:09  TreeViewConnectingLines\WindowsApplication3\bin\Debug\WindowsApplication3.vshost.exe

     文件        189  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\bin\Debug\WindowsApplication3.vshost.exe.config

     文件        490  2016-03-09 13:48  TreeViewConnectingLines\WindowsApplication3\bin\Debug\WindowsApplication3.vshost.exe.manifest

     文件       8971  2017-09-24 19:54  TreeViewConnectingLines\WindowsApplication3\MainWindow.xaml

     文件       1334  2017-09-24 19:32  TreeViewConnectingLines\WindowsApplication3\MainWindow.xaml.cs

     文件       2365  2017-09-24 19:10  TreeViewConnectingLines\WindowsApplication3\obj\Debug\App.g.cs

     文件       2365  2017-09-24 19:13  TreeViewConnectingLines\WindowsApplication3\obj\Debug\App.g.i.cs

     文件       7367  2017-09-24 19:54  TreeViewConnectingLines\WindowsApplication3\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       3015  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\GeneratedInternalTypeHelper.g.cs

     文件       3015  2017-09-24 19:54  TreeViewConnectingLines\WindowsApplication3\obj\Debug\GeneratedInternalTypeHelper.g.i.cs

     文件       5311  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\MainWindow.baml

     文件       3060  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\MainWindow.g.cs

     文件       3060  2017-09-24 19:54  TreeViewConnectingLines\WindowsApplication3\obj\Debug\MainWindow.g.i.cs

     文件          0  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

     文件          0  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

     文件          0  2017-09-24 19:08  TreeViewConnectingLines\WindowsApplication3\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

     文件       1505  2017-09-24 19:10  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3.csproj.FileListAbsolute.txt

     文件        954  2017-09-24 19:10  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3.csproj.GenerateResource.Cache

     文件      15360  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3.exe

     文件       5539  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3.g.resources

     文件      26112  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3.pdb

     文件        180  2017-09-24 19:10  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3.Properties.Resources.resources

     文件        319  2017-09-24 19:49  TreeViewConnectingLines\WindowsApplication3\obj\Debug\WindowsApplication3_MarkupCompile.cache

............此处省略23个文件信息