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我試圖創建一個ASP,使用下面在asp.net中綁定樹視圖結構?
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView
ID="TreeView1"
runat="server" />
</div>
</form>
和明碼淨樹狀結構背後
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
PopulateTreeView();
}
private void PopulateTreeView()
{
DataTable treeViewData = GetTreeViewData();
AddTopTreeViewNodes(treeViewData);
}
private DataTable GetTreeViewData()
{
string selectCommand = "SELECT top 10 idx_client,idx_branch,client_name FROM tbl_client";
string conString =System.Configuration.ConfigurationManager.AppSettings["ConnectionString"].ToString();
SqlDataAdapter dad = new SqlDataAdapter(selectCommand, conString);
DataTable dtblDiscuss = new DataTable();
dad.Fill(dtblDiscuss);
return dtblDiscuss;
}
private void AddTopTreeViewNodes(DataTable treeViewData)
{
DataView view = new DataView(treeViewData);
foreach (DataRowView row in view)
{
TreeNode newNode = new TreeNode(row["client_name"].ToString(), row["idx_client"].ToString());
TreeView1.Nodes.Add(newNode);
newNode.PopulateOnDemand = true;
AddChildTreeViewNodes(treeViewData, newNode);
}
}
private void AddChildTreeViewNodes(DataTable treeViewData, TreeNode parentTreeViewNode)
{
DataView view = new DataView(treeViewData);
foreach (DataRowView row in view)
{
TreeNode newNode = new TreeNode(row["client_name"].ToString(), row["idx_client"].ToString());
parentTreeViewNode.ChildNodes.Add(newNode);
newNode.PopulateOnDemand = true;
AddChildTreeViewNodes(treeViewData, newNode);
}
}
但它給出了一個例外
無法計算表達式,因爲目前的線程處於堆棧溢出狀態
請指出需要哪些更改,因爲我第一次使用此樹視圖 我將如何解決異常。任何人都可以幫助我。