Asp.net Treeview控件 [英] Asp.net Treeview Control

问题描述

我有2帧。在一个框架中，我添加了树视图控件并设置其属性

I Have 2 frames. In one frame I have add Tree view control and set its property

<asp:TreeView ID="tvOrg" runat="server"  onclick="fnOnClick()" oncontextmenu="ShowTreeviewContextMenu(this, event);"   PopulateNodesFromClient="true" OnTreeNodePopulate="PopulateNode"   ShowLines="true"  ExpandDepth="0" EnableClientScript="true" HoverNodeStyle-Font-Italic="true" HoverNodeStyle-BackColor="Aqua">
                      </asp:TreeView>

另一帧我有一个文本框和一个按钮。当我点击这个按钮。左侧框架中添加了一个新节点。但我的问题是，当我点击此按钮时，左框架中添加了2个新节点因为OnTreeNodePopulate事件自动调用。



你能帮我解决这个问题。如何在树视图中避免这些重复记录。



请求，请尽快解决这个问题。

on the another frame I have one textbox and one button. when I click on this button . A new node has added in the left frame. But my problem is when I click on this button 2 new nodes have been added in left frame Because "OnTreeNodePopulate" event called automatically .

Could you please help me on this How can I avoid these duplicate records in treeview.

Its an request, please sort out this issue asap.

推荐答案

您是否可以尝试将节点的PopulateOnDemand属性设置为false并检查节点是否添加了两次。



//创建新的

TreeNode NewNode = new TreeNode（row [ProductName]。ToString（））;



//将PopulateOnDemand属性设置为false，因为这些是叶节点，并且不需要填充
//

NewNode。 PopulateOnDemand = false;

Hi,

Can you try to set PopulateOnDemand property for a node is set to false and check if the node is added twice.

// Create the new
TreeNode NewNode = new TreeNode(row["ProductName"].ToString());

// Set the PopulateOnDemand property to false, because these are leaf nodes and
// do not need to be populated.
NewNode.PopulateOnDemand = false;

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