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Treeview动态添加用户控件传值和取值的实例代码

时间：2021-04-30 16:04 编辑：来源：阅读：
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摘要：Treeview动态添加用户控件传值和取值的实例代码

[img]http://files.jb51.net/file_images/article/201304/2013427111936978.jpg[/img] 主要功能：勾选子节点的checkbox,右边会动态加载该节点的信息，出现TextBox让用户填写节点的值,点击保存按钮将文本框的值保存到对应的节点。里面涉及到了asp执行ascx页面里的事件，并取值。这是前台的代码:CustomXMLmanager.aspx

[u]复制代码[/u] 代码如下:

 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CustomXMLmanager.aspx.cs" Inherits="usexml.CustomXMLmanager" %>

  <%@ Register src=http://www.cnblogs.com/panan/archive////"Custom.ascx" tagname="Custom" tagprefix="uc" %>

  <!DOCTYPE html PUBLIC "-//WC//DTD XHTML .0 Transitional//EN" "http://www.w.org/TR/xhtml/DTD/xhtml-transitional.dtd">

  <html xmlns="http://www.w.org//xhtml">
  <head runat="server">
      <title></title>
 </head>
 <body>
 <script language="javascript" type="text/javascript">

     // 点击复选框时触发事件

     function postBackByObject() {

         var o = window.event.srcElement;

         if (o.tagName == "INPUT" && o.type == "checkbox") {

             __doPostBack("", "");

         }

     }
 </script>
     <form id="form" runat="server">
     <div>
             <asp:ScriptManager ID="ScriptManager" runat="server">
         </asp:ScriptManager>
  <asp:UpdatePanel ID="UpdatePanel" runat="server">
         <ContentTemplate>
     <table width="%" style="border: px dotted #00"><tr><td width="%">                
     <asp:TreeView ID="TreeView" runat="server" ImageSet="Simple" ShowCheckBoxes="Leaf"
             ShowLines="True"
             ViewStateMode="Enabled">
         <HoverNodeStyle Font-Underline="True" ForeColor="#DD" />
         <Nodes>
             <asp:TreeNode Text="个人信息" Value=http://www.cnblogs.com/panan/archive////"海洋信息数据集">
                 <asp:TreeNode Text="名字" Value=http://www.cnblogs.com/panan/archive////"数据名称"></asp:TreeNode>
                 <asp:TreeNode Text="性别" Value=http://www.cnblogs.com/panan/archive////"数据格式"></asp:TreeNode>
                 <asp:TreeNode Text="年龄" Value=http://www.cnblogs.com/panan/archive////"数据摘要"></asp:TreeNode>
                 <asp:TreeNode Text="帅不帅" Value=http://www.cnblogs.com/panan/archive////"帅不帅"></asp:TreeNode>
                 <asp:TreeNode Text="漂不漂亮" Value=http://www.cnblogs.com/panan/archive////"漂不漂亮"></asp:TreeNode>
             </asp:TreeNode>
         </Nodes>
         <NodeStyle Font-Names="Tahoma" Font-Size="pt" ForeColor="Black"
             HorizontalPadding="0px" NodeSpacing="0px" VerticalPadding="0px" />
         <ParentNodeStyle Font-Bold="False" />
         <SelectedNodeStyle Font-Underline="True" ForeColor="#DD"
             HorizontalPadding="0px" VerticalPadding="0px" />
     </asp:TreeView>

     </td>
     <td style="background-color: #00; width: px"></td>
     <td>
         <asp:PlaceHolder ID="PlaceHolder" runat="server"></asp:PlaceHolder>
     </td>

     </tr></table>
        <div>

     </div>
         </ContentTemplate>
         </asp:UpdatePanel>

     </div>
       <div align="center"><asp:Button ID="Button" runat="server" Text="保存"
               onclick="Button_Click" /></div>
     </form>
 </body>
 </html>

这是后台代码:CustomXMLmanager.aspx.cs

[u]复制代码[/u] 代码如下:

   using System;
   using System.Collections.Generic;
   using System.Linq;
   using System.Web;
   using System.Web.UI;
   using System.Web.UI.WebControls;
   using System.Reflection;
   namespace usexml
  {
      public partial class CustomXMLmanager : System.Web.UI.Page
      {
          protected void Page_Load(object sender, EventArgs e)
          {

              if (IsPostBack)
              {
                    //if (ViewState["node"] != null)
  //{
  //    nodes();

  //}
                  nodes();
              }
              TreeView.Attributes.Add("onclick", "postBackByObject()");

          }
          private void nodes()
          {
              int tg = 0;
              foreach (TreeNode nod in TreeView.CheckedNodes)
              {

                  nod.Target = tg.ToString();
                  Custom uc = (Custom)LoadControl("Custom.ascx");
                  uc.Nodname = nod.Text;
                  uc.Nodvalue = http://www.1sucai.cn/panan/archive////nod.Value;
                  uc.Nodetag = nod.Target;
                  PlaceHolder.Controls.Add(uc);
                  tg++;
              }
          }
          protected void Button_Click(object sender, EventArgs e)
          {
              for (int i = 0; i < PlaceHolder.Controls.Count; i++)
              {
                  UserControl uc = (UserControl)PlaceHolder.Controls[i];

                  Type ucType = uc.GetType();

                  //用MethodInfo类来获取用户控件中的方法．

                  MethodInfo UcMethod = ucType.GetMethod("GetText");// Button_Click控件中的方法。

  //在此处页面的方法中执行用户控件中的方法．

                  object[] argumentArrray = new object[0];

                  UcMethod.Invoke(uc, new object[0]);//调用用户控件中的方法。此处执行了！！。

                  foreach (TreeNode nod in TreeView.CheckedNodes)
                  {
                      PropertyInfo UctextName = ucType.GetProperty("PicName");
                      PropertyInfo tag = ucType.GetProperty("Nodetag");
                      if (nod.Target == tag.GetValue(uc, null).ToString())
                      {

                          nod.Value = http://www.1sucai.cn/panan/archive////UctextName.GetValue(uc, null).ToString();//获取了上传的文件名信息。并显示在 page 页面上。
                      }
                  }
             }
         }
     }
 }

这是用户控件的前台:Custom2.ascx

[u]复制代码[/u] 代码如下:

 <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Custom2.ascx.cs" Inherits="usexml.Custom2" %>
 <div>
 <asp:Label ID="Label1" runat="server" Text="Label" ForeColor="#006666"></asp:Label>
 <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
 当前节点的值:<asp:Label ID="Label2" runat="server" Text="Label" ForeColor="#003366"></asp:Label>

 </div>

这是用户控件的后台:Custom2.ascx.cs

[u]复制代码[/u] 代码如下:

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using System.Web.UI;
  using System.Web.UI.WebControls;

  namespace usexml
  {
     public partial class Custom2 : System.Web.UI.UserControl
     {
         private string nodname = "";
         public string nodvalue = http://www.1sucai.cn/panan/archive/2011/12/28/"";
         private string nodtag = "";
         private string picname = "";
         public string Nodname
         {

 
             get
             {
                 return nodname;
             }

             set
             {
                 nodname = value;

             }
         }

         public string Nodvalue
         {
             get
             {
                 return nodvalue;
             }
             set
             {
                 nodvalue = http://www.1sucai.cn/panan/archive/2011/12/28/value;
             }
         }
         public string Nodetag
         {
             get
             {
                 return nodtag;
             }
             set
             {
                 nodtag = value;
             }
         }
         public string PicName
         {
             get { return picname; }
             set { picname = value; }

         }

         protected void Page_Load(object sender, EventArgs e)
         {
             Label1.Text = nodname+"：";          
             Label2.Text = nodvalue;

         }

         public void GetText()
         {
   picname = TextBox1.Text;
          TextBox1.Text = "";
          Label2.Text = picname;
         }

     }
 }

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