。net控件学习之使用TreeView显示文件夹

 

 

 

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1.使用TV显示文件夹

 

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前台:

//ImageSet:可使用系统提供视图;OnTreeNodePopulate:展开时触发事件;PopulateNodesFromClient:为true时表示异步从服务器获得子节点

//Value:地址;Expanded:第一节点不可扩展;PopulateOnDemand:异步

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    <div>

       <asp:TreeView runat="server" ID="TreeView1"

           ImageSet="XPFileExplorer"

           OnTreeNodePopulate="TreeView1_TreeNodePopulate"

           PopulateNodesFromClient="true">

           <Nodes>

              <asp:TreeNode

                  Text="自学"

                  Value="C:\Documents and Settings\Administrator\桌面\自学"

                  Expanded="false"

                  PopulateOnDemand="true" />

           </Nodes>

       </asp:TreeView>

    </div>

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后台:

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    //TreeNodePopulate()指填充TreeNode时激发的事件,带有TreeNodeEventArgs属性

    protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e)

    {

        //需要引入命名空间System.IO,用于提取目录

        //其中DirectoryInfo设置提取文件夹,而FileInfo是提取出文件

        DirectoryInfo info = new DirectoryInfo(e.Node.Value);

 

        foreach (DirectoryInfo directory in info.GetDirectories())

        {

            TreeNode newNode = new TreeNode();

            newNode.PopulateOnDemand = true;

            newNode.Text = directory.Name;

            newNode.Value = directory.FullName;

            e.Node.ChildNodes.Add(newNode);

        }

 

        foreach (FileInfo file in info.GetFiles())

        {

            TreeNode newNode = new TreeNode();

            newNode.Text = file.Name;

            newNode.Value = file.FullName;

            e.Node.ChildNodes.Add(newNode);

        }

    }

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----使用示例

 

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posted @ 2011-04-15 06:40  思考之驴  阅读(179)  评论(0编辑  收藏  举报