TreeView问题，在有的服务器上可以运行，而在有的服务器中取不能

2009-09-04 03:33:32 184 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

ASP.NET的TreeView 树是组织信息的强有力工具，软件开发人员手中一定要有一棵称手的“树”。这篇文章以VS2008为例讨论ASP.NET提供的树控件“TreeView”，看看它是否足够强大，能否满足商业应用。1 首次使用遇到的问题很简单的，我在页面（WebForm）中添加一个“TreeView”，然后在设计视图里添加了几个静态节点，出于美观的需要，我想把节点用线连接起来，微软果然厚道，通过“自定义行图标”直接设置“LineStyle”为“Solid”，搞定！下面是显示效果：<br 阅读详情

代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using MIS.IE_Export_DAL;

public partial class IE_Toptreeview : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string msg = "";
IeSystemStruct ies = new IeSystemStruct();
string sid = (string)Session["ID"];
DataTable dt = ies.Getsystemstruct(sid, out msg);
if (dt != null)
{
PopulateNodes(this.TreeView1.Nodes, "0", dt);
TreeView1.Nodes[0].Selected = true;
TreeView1.SelectedNode.Expanded = true;
}

}
}
#region 递归调用
/// <summary>
/// 递归调用加载模块
/// </summary>
/// <param name="nodes"></param>
/// <param name="strParentID"></param>
/// <param name="dt"></param>
public void PopulateNodes(TreeNodeCollection nodes, string strParentID, DataTable dt)
{

DataView dv = dt.DefaultView;
dv.RowFilter = "ParentID='" + strParentID + "'";
foreach (DataRowView drv in dv)
{
TreeNode tmpNd = new TreeNode();
tmpNd.Value = drv["DepartmentID"].ToString();
// tmpNd.Value = drv[2].ToString().Trim();
if (drv["DeptLeader"].ToString() == "N")
{
if (drv["Main_ID"].ToString() == "Export")
{
if (drv["CostCode"].ToString() != "")
{
tmpNd.NavigateUrl = "/OTIZWEB/IE/Export/" + drv["CostCode"].ToString();
tmpNd.Target = "mainFrame";
}

}
else if (drv["Main_ID"].ToString() == "LC")
{
if (drv["CostCode"].ToString() != "")
{
tmpNd.NavigateUrl = "/OTIZWEB/IE/Export/LC/" + drv["CostCode"].ToString();
tmpNd.Target = "mainFrame";
}
}
else if (drv["Main_ID"].ToString() == "Shipping")
{
if (drv["CostCode"].ToString() != "")
{
tmpNd.NavigateUrl = "/OTIZWEB/IE/Export/Shipping/" + drv["CostCode"].ToString();
tmpNd.Target = "mainFrame";
}
}
else if (drv["Main_ID"].ToString() == "IE")
{
if (drv["CostCode"].ToString() != "")
{
tmpNd.NavigateUrl = "/OTIZWEB/IE/" + drv["CostCode"].ToString();
tmpNd.Target = "mainFrame";
}
}
else if (drv["Main_ID"].ToString() == "FEPI")
{
if (drv["CostCode"].ToString() != "")
{
tmpNd.NavigateUrl = "/OTIZWEB/IE/Export/FEPI/" + drv["CostCode"].ToString();
tmpNd.Target = "mainFrame";
}
}
tmpNd.Text = "<span style='color:Blue'>" + drv["DepartmentName"].ToString() + "</span>";
}
else
{
tmpNd.Text = drv["DepartmentName"].ToString();
}
nodes.Add(tmpNd);
PopulateNodes(tmpNd.ChildNodes, tmpNd.Value.ToString(), dt);
}

}
#endregion
protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
for (int i = 0; i < this.TreeView1.Nodes.Count; i++)
{//跌迭根节点
if (this.TreeView1.SelectedValue == this.TreeView1.Nodes[i].Value)
{//如果选中的是根节点,就展开
this.TreeView1.SelectedNode.Expanded = true;
}
else
{
if (TreeView1.SelectedNode.Parent != null)
{
//如果选中的不是根节点
for (int j = 0; j < this.TreeView1.SelectedNode.Parent.ChildNodes.Count; j++)
{//就让选中节点的所有同级节点收缩
this.TreeView1.SelectedNode.Parent.ChildNodes[j].CollapseAll();
}
//然后再展开选中的节点及其所有父节点
this.TreeView1.SelectedNode.Parent.Expanded = true;
this.TreeView1.SelectedNode.Expanded = true;
if (TreeView1.SelectedNode.NavigateUrl != "")
{
treeinput.Value = TreeView1.SelectedNode.NavigateUrl;
}
}
}
}

}
}

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