获取树形视图中选定节点的值 [英] get the value of selected node in the treeview

问题描述

这是我的代码.我想从树形视图控件中获取选定的值，这是我的代码

this is my code. I want to get selected value from the tree view control here is my code

protected void Page_Load(object sender, EventArgs e)
      {

if (Page.IsPostBack == false)
            {
                DirectoryInfo RootDir = new DirectoryInfo(Server.MapPath("~/AudioFiles"));

                // output the directory into a node
                TreeNode RootNode = OutputDirectory(RootDir, null);

                // add the output to the tree
                TreeView1.Nodes.Add(RootNode);
            }

        }
 TreeNode OutputDirectory(DirectoryInfo directory, TreeNode parentNode)
    {
        // validate param
        if (directory == null) 
            return null; 

        // create a node for this directory
        TreeNode DirNode = new TreeNode(directory.Name);

        // get subdirectories of the current directory
        DirectoryInfo[] SubDirectories = directory.GetDirectories();

        // OutputDirectory(SubDirectories[0], "Directories");
        // output each subdirectory
        for (int DirectoryCount = 0; DirectoryCount < SubDirectories.Length; DirectoryCount++)
        {
            OutputDirectory(SubDirectories[DirectoryCount], DirNode);
        }

        // output the current directories file
        FileInfo[] Files = directory.GetFiles();
        for (int FileCount = 0; FileCount < Files.Length; FileCount++)
        {
            DirNode.ChildNodes.Add(new TreeNode(Files[FileCount].Name));
        }
       
        // if the parent node is null, return this node
        // otherwise add this node to the parent and return the parent
        if (parentNode == null)
        {
            return DirNode;
        }
        else
        {
            parentNode.ChildNodes.Add(DirNode);
            return parentNode;
        }
    }

请提出

谢谢

please suggest

Thank you

推荐答案

TreeView有几种方法可以完成此操作，具体取决于最终要实现的目标.

您可以使用一个SelectedNodeChanged事件.这与列表框的行为相同.

其次，存在NavigateUrl属性，将其设置为空字符串以外的其他值将导致在单击时重定向页面.

有关更多信息和较小示例，请参见此处的文档:

The TreeView has several ways you can do this, depending on what you what to achieve in the end.

There is a SelectedNodeChanged event which you could use. This behaves the same as with a listbox.

Secondly there is the NavigateUrl property, setting this to a value other than empty string will cause a page redirect upon click.

See the documentation here for more information and a small sample: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.treeview(v=vs.100).aspx[^]

Hope this helps you on your way :-)

treeview.SelectedNode.Value;

treeview.SelectedNode.Value ;

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