ASP.NET(C#)

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DropDownList联动的例子(c#)



TreeDropDownList.aspx：

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

<%@ Page language="c#" Codebehind="TreeDropDownList.aspx.cs" AutoEventWireup="false" Inherits="TowDropDownList.TowDropDownList" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
 <HEAD>
  <title>TreeDropDownList</title>
  <meta content="Microsoft Visual Studio 7.0" name="GENERATOR">
  <meta content="C#" name="CODE_LANGUAGE">
  <meta content="JavaScript" name="vs_defaultClientScript">
  <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
  <script language="javascript">

  var Wantcount;
  var Groupcount;

  Groupcount=0;

  Group = new Array();
  <asp:Literal id="Want" runat="server"></asp:Literal>

  function changelocation1(locationid)
  {
   document.submit.DirectionList1.length = 0;
   document.submit.WantList1.length = 0;
   var locationid=locationid;
   var i;
   var flag;
   var j;
   for (i=0;i<Groupcount; i++)
   {
    if (Group[i][0] == locationid)
    {
     flag = true;
     for (j =0;j<document.submit.DirectionList1.length;j++)
      if (document.submit.DirectionList1[j].value == Group[i][1])
       {
        flag = false;
        break;
       }
     if (flag)
      document.submit.DirectionList1.options[document.submit.DirectionList1.length]
      = new Option(Group[i][1], Group[i][1]);
    }
   }
  }


  function changelocation11(locationid, direction)
  {
   document.submit.WantList1.length = 0;
   var locationid=locationid;
   var i;
   var flag;
   var j;
   for (i=0;i<Groupcount;i++)
   {
    if (Group[i][0] == locationid && Group[i][1] == direction)
    {
     
     flag = true;
     for (j=0;j<document.submit.WantList1.length;j++)
      if (document.submit.WantList1[j].value == Group[i][2])
      {
       flag = false;
       break;
      }
     if (flag)
      document.submit.WantList1.options[document.submit.WantList1.length]
      = new Option(Group[i][2], Group[i][2]);
    }
   }
  }

  </script>
 </HEAD>
 <BODY ms_positioning="GridLayout">
  <form id="submit" method="post" runat="server">
   <TABLE style="Z-INDEX: 101; LEFT: 184px; POSITION: absolute; TOP: 144px">
    <TR>
     <TD style="WIDTH: 115px; HEIGHT: 17px" align="middle">求职意向：</TD>
     <TD style="HEIGHT: 17px"><asp:dropdownlist id="SourceList1" runat="server" DataTextField="v_source" DataValueField="v_source" onchange="changelocation1(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value);changelocation11(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value,document.submit.DirectionList1.options[document.submit.DirectionList1.selectedIndex].value)" Width="100px"></asp:dropdownlist><asp:dropdownlist id="DirectionList1" runat="server" DataValueField="v_GroupName" onchange="changelocation11(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value,document.submit.DirectionList1.options[document.submit.DirectionList1.selectedIndex].value)" Width="100px"></asp:dropdownlist><asp:dropdownlist id="WantList1" runat="server" DataValueField="v_title" Width="100px"></asp:dropdownlist></TD>
    </TR>
   </TABLE>
  </form>
  <script language="javascript">
   changelocation1(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value);
   changelocation11(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value,document.submit.DirectionList1.options[document.submit.DirectionList1.selectedIndex].value)
  </script>

 

 

 


TreeDropDownList.aspx.cs:

-----------------------------------------------------------------------------------------------------------------------------------------
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace TowDropDownList
{
 /// <summary>
 /// TowDropDownList 的摘要说明。
 /// </summary>
 public class TowDropDownList : System.Web.UI.Page
 {
  protected System.Web.UI.WebControls.Literal Want;
  protected System.Web.UI.WebControls.DropDownList SourceList1;
  protected System.Web.UI.WebControls.DropDownList DirectionList1;
  protected System.Web.UI.WebControls.DropDownList WantList1;
  protected System.Web.UI.WebControls.Literal Group;

  private void Page_Load(object sender, System.EventArgs e)
  {
   if (!IsPostBack)
   {
    DataSet ds = new DataSet();
    ds.ReadXml(Server.MapPath("DataSource.xml"));
    for(int i = 0;i <ds.Tables[0].Rows.Count ;i++)
    {
     DataRow dr = ds.Tables[0].Rows[i];
     Want.Text += String.Format("Group[Groupcount++] = new Array(\"{0}\",\"{1}\",\"{2}\");\n", dr["v_Source"],dr["v_GroupName"].ToString(), dr["v_title"].ToString());
     if (SourceList1.Items.FindByText(dr["v_Source"].ToString()) == null)
     {
      SourceList1.Items.Add(dr["v_Source"].ToString());
     }
    }
   }
  }

  #region Web Form Designer generated code
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion
 }
}

 


DataSource.xml:

-----------------------------------------------------------------------------------------------------------------------------
<DataSource>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>软件</v_GroupName>
<v_title>程序员</v_title>
</Data>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>软件</v_GroupName>
<v_title>系统分析员</v_title>
</Data>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>软件</v_GroupName>
<v_title>项目经理</v_title>
</Data>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>硬件</v_GroupName>
<v_title>网络工程师</v_title>
</Data>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>硬件</v_GroupName>
<v_title>计算机维护</v_title>
</Data>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>数据库</v_GroupName>
<v_title>数据库开发</v_title>
</Data>
<Data>
<v_Source>计算机类</v_Source>
<v_GroupName>数据库</v_GroupName>
<v_title>数据库管理</v_title>
</Data>
<Data>
<v_Source>行政/管理类</v_Source>
<v_GroupName>行政</v_GroupName>
<v_title>文秘</v_title>
</Data>
<Data>
<v_Source>行政/管理类</v_Source>
<v_GroupName>行政</v_GroupName>
<v_title>助理</v_title>
</Data>
<Data>
<v_Source>行政/管理类</v_Source>
<v_GroupName>管理</v_GroupName>
<v_title>总经理</v_title>
</Data>
<Data>
<v_Source>行政/管理类</v_Source>
<v_GroupName>管理</v_GroupName>
<v_title>部门经理</v_title>
</Data>
<Data>
<v_Source>行政/管理类</v_Source>
<v_GroupName>管理</v_GroupName>
<v_title>总监</v_title>
</Data>
</DataSource>

posted on 2005-01-26 22:54  battlerstar  阅读(6633)  评论(3)  编辑  收藏  举报