关于 Asp.net TreeView 控件

RayLynn 2006-04-21 06:17:44

在我点击父级复选框时，我想同事也将子级所有选项都变为已选择，该如何做到？

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loveme4180 2006-04-26

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恭喜楼主

RayLynn 2006-04-26

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我把全代码帖上：

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
PostBackOptions myPostBackOptions = new PostBackOptions(this);
myPostBackOptions.ActionUrl = "Default.aspx";
myPostBackOptions.AutoPostBack = false;
myPostBackOptions.RequiresJavaScriptProtocol = true;
myPostBackOptions.PerformValidation = true;
TreeView1.Attributes.Add("onclick",Page.ClientScript.GetPostBackEventReference(myPostBackOptions));
}

protected void TreeView1_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)
{
if (e.Node.Checked == false)
unCheckParents(e.Node);
CheckChilds(e.Node);
}

protected void CheckChilds(TreeNode treeNode)
{
foreach (TreeNode tn in treeNode.ChildNodes)
{
tn.Checked = treeNode.Checked;
CheckChilds(tn);
}
}

protected void unCheckParents(TreeNode treeNode)
{
if (treeNode.Parent == null) return;
treeNode.Parent.Checked = false;
unCheckParents(treeNode.Parent);
}
}

--------------------------------------------------

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="TreeView1" runat="server" OnTreeNodeCheckChanged="TreeView1_TreeNodeCheckChanged"
ShowCheckBoxes="All" ShowLines="True" OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">
<Nodes>
<asp:TreeNode Text="新建节点" Value="新建节点">
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
<asp:TreeNode Text="新建节点" Value="新建节点">
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
</asp:TreeNode>
</asp:TreeNode>
<asp:TreeNode Text="新建节点" Value="新建节点">
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
</asp:TreeNode>
<asp:TreeNode Text="新建节点" Value="新建节点">
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
</asp:TreeNode>
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
<asp:TreeNode Text="新建节点" Value="新建节点"></asp:TreeNode>
</Nodes>
</asp:TreeView>
</div>
</form>
</body>
</html>

RayLynn 2006-04-26

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OK，我搞定了，分享下。在 Page_Load 事件中加入这么一段代码：
这个TREEVIEW就可以在单击复选框时触发 TreeView1_TreeNodeCheckChanged 事件了。
但是唯一缺点在于每次单击后都要dopostback一下。

protected void Page_Load(object sender, EventArgs e)
{
PostBackOptions myPostBackOptions = new PostBackOptions(this);
myPostBackOptions.ActionUrl = "Default.aspx";
myPostBackOptions.AutoPostBack = false;
myPostBackOptions.RequiresJavaScriptProtocol = true;
myPostBackOptions.PerformValidation = true;
TreeView1.Attributes.Add("onclick",Page.ClientScript.GetPostBackEventReference(myPostBackOptions));

}

希望有更好的办法`

RayLynn 2006-04-25