我在之前很多文章里面，介绍过Winform主界面的开发，基本上都是标准的界面，在顶部放置工具栏，中间区域则放置多文档的内容，但是在顶部菜单比较多的时候，就需要把菜单分为几级处理，如可以在顶部菜单放置一二级菜单，这种方式在一般功能点不算太多的情况下，呈现的界面效果较为直观、也较为美观。不过随着一些系统功能的增多，这种方式可能就会显得工具栏比较拥挤，那么我们是否可以在左侧放置一个树形列表，这样通过树形列表的收缩折叠，就可以放置非常多的菜单功能了。
资源文件列表
Treeview/TreeViewLearn/TreeViewLearn/App.config , 271
Treeview/TreeViewLearn/TreeViewLearn/bin/Debug/TreeViewLearn.exe , 25088
Treeview/TreeViewLearn/TreeViewLearn/bin/Debug/TreeViewLearn.exe.config , 271
Treeview/TreeViewLearn/TreeViewLearn/bin/Debug/TreeViewLearn.pdb , 71168
Treeview/TreeViewLearn/TreeViewLearn/bin/Debug/TreeViewLearn.vshost.exe , 11600
Treeview/TreeViewLearn/TreeViewLearn/bin/Debug/TreeViewLearn.vshost.exe.config , 271
Treeview/TreeViewLearn/TreeViewLearn/bin/Debug/TreeViewLearn.vshost.exe.manifest , 490
Treeview/TreeViewLearn/TreeViewLearn/Form1.cs , 7059
Treeview/TreeViewLearn/TreeViewLearn/Form1.Designer.cs , 7846
Treeview/TreeViewLearn/TreeViewLearn/Form1.resx , 5817
Treeview/TreeViewLearn/TreeViewLearn/Form2.cs , 3067
Treeview/TreeViewLearn/TreeViewLearn/Form2.Designer.cs , 3906
Treeview/TreeViewLearn/TreeViewLearn/Form2.resx , 5817
Treeview/TreeViewLearn/TreeViewLearn/Form3.cs , 6014
Treeview/TreeViewLearn/TreeViewLearn/Form3.Designer.cs , 10509
Treeview/TreeViewLearn/TreeViewLearn/Form3.resx , 6228
Treeview/TreeViewLearn/TreeViewLearn/Form4.cs , 919
Treeview/TreeViewLearn/TreeViewLearn/Form4.Designer.cs , 3901
Treeview/TreeViewLearn/TreeViewLearn/Form4.resx , 5817
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/DesignTimeResolveAssemblyReferences.cache , 5359
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/DesignTimeResolveAssemblyReferencesInput.cache , 6499
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.csproj.FileListAbsolute.txt , 2706
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.csproj.GenerateResource.Cache , 1149
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.csprojResolveAssemblyReference.cache , 9836
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.exe , 25088
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.Form1.resources , 180
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.Form2.resources , 180
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.Form3.resources , 180
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.Form4.resources , 180
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.pdb , 71168
Treeview/TreeViewLearn/TreeViewLearn/obj/x86/Debug/TreeViewLearn.Properties.Resources.resources , 180
Treeview/TreeViewLearn/TreeViewLearn/Program.cs , 494
Treeview/TreeViewLearn/TreeViewLearn/Properties/AssemblyInfo.cs , 1358
Treeview/TreeViewLearn/TreeViewLearn/Properties/Resources.Designer.cs , 2878
Treeview/TreeViewLearn/TreeViewLearn/Properties/Resources.resx , 5612
Treeview/TreeViewLearn/TreeViewLearn/Properties/Settings.Designer.cs , 1100
Treeview/TreeViewLearn/TreeViewLearn/Properties/Settings.settings , 249
Treeview/TreeViewLearn/TreeViewLearn/sqlHelper.cs , 4607
Treeview/TreeViewLearn/TreeViewLearn/TreeViewLearn.csproj , 4722
Treeview/TreeViewLearn/TreeViewLearn.sln , 881
Treeview/TreeViewLearn/TreeViewLearn.suo , 28160
Treeview/treeviewTest.sql , 146
Treeview/treeview控件.pptx , 50872