TreeView的选中CheckBox触发事件

前台：

   

   

   

   

       

       

         

   

后台：

protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            //构建TreeView

            TreeNode Node00 = new TreeNode("00", "00");

            TreeNode Node01 = new TreeNode("01", "01");

            TreeNode Node0101 = new TreeNode("0101", "0101");

            TreeNode Node0102 = new TreeNode("0102", "0102");

            TreeNode Node02 = new TreeNode("02", "02");

            Node01.ChildNodes.Add(Node0101);

            Node01.ChildNodes.Add(Node0102);

            Node00.ChildNodes.Add(Node01);

            Node00.ChildNodes.Add(Node02);

            TreeView1.Nodes.Add(Node00);

            TreeView1.ShowCheckBoxes = TreeNodeTypes.All;//显示CheckBox

            TreeView1.ExpandDepth = 0;

        }

        TreeView1.Attributes.Add("onclick", "postBackByObject()");

    }

    protected void TreeView1_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)

    {

        SetChildChecked(e.Node);

    }

    private void SetChildChecked(TreeNode parentNode)

    {

        foreach (TreeNode node in parentNode.ChildNodes)

        {

            node.Checked = parentNode.Checked;

            if (node.ChildNodes.Count > 0)

            {

                SetChildChecked(node);

            }

        }

    }

这里客户端有个 __doPostBack函数，弄清它的原理，如下：

__doPostBack(id, eventArgument)来和控件交互。doPostBack的用法是，id: 服务器控件的ClientID，eventArgument: 传回服务器的参数。这个参数在服务器端通过IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection)来读取

了解到此

转载于:https://www.cnblogs.com/liufei88866/archive/2010/12/28/1918745.html