转载请注明出处--翱翔.Net Blog Http://cnblogs.com/Hover
News_Aclass表---大类表
ClassID Int 4
ClassName varchar 50
News_Anclass表---小类表
NclassID int 4
Nclass varchar 50
ClassID int 4
---------------------------------aspx------------------------------
<%@ Page language="c#" Codebehind="test.aspx.cs" AutoEventWireup="false" Inherits="HoverPortal.Modules.NewsManager.test" enableViewState="False"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>test</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body> <form id="Form1" method="post" runat="server"> <asp:DropDownList id="ClassID" runat="server" onChange="changelocation(document.Form1.ClassID.options[document.Form1.ClassID.selectedIndex].value)"></asp:DropDownList> <asp:DropDownList id="NclassID" runat="server"></asp:DropDownList> <asp:Button id="Button1" runat="server" Text="Button"></asp:Button> </form> </body></HTML>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;using System.Data.SqlClient;using Microsoft.ApplicationBlocks.Data;namespace HoverPortal.Modules.NewsManager{
/// <summary>
/// test 的摘要说明。
/// </summary> public class test : System.Web.UI.Page { protected System.Web.UI.WebControls.DropDownList NclassID; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.DropDownList ClassID; private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 ReWriteScript(); //if(!Page.IsPostBack ) DataBinds(); } private void ReWriteScript() { int count=0; string scriptString="<Script Language=JavaScript>\n var onecount;"; scriptString +="\nonecount=0;"; scriptString +="\nsubcat=new Array();"; SqlDataReader rs=this.GetNclass(); while(rs.Read()) { scriptString +="\n subcat["+count+"]=new Array("+"'"+rs["Nclass"]+"'"+","+"'"+rs["classID"]+"'"+","+"'"+rs["NclassID"]+"'"+");"; count++; } rs.Close(); scriptString +="\n onecount="+count+";"; scriptString +="\n function changelocation(locationid){"; scriptString +="\n document.Form1.NclassID.length = 0;"; scriptString +="\n var locationid=locationid;"; scriptString +="\n var i;"; scriptString +="\n for(i=0; i<onecount; i++){"; scriptString +="\n if(subcat[i][1]==locationid){"; scriptString +="\n document.Form1.NclassID.options[document.Form1.NclassID.length]=new Option(subcat[i][0],subcat[i][2]);"; scriptString +="\n }"; scriptString +="\n }"; scriptString +="\n }"; scriptString +="<"; scriptString +="/"; scriptString +="script>"; if(!this.IsClientScriptBlockRegistered("clientScript")) { this.RegisterClientScriptBlock("clientScript",scriptString); } } private SqlDataReader GetNclass() { SqlDataReader NclassReader=SqlHelper.ExecuteReader(SqlDbObject.Connection,CommandType.StoredProcedure,"sp_News_GetNClass"); return NclassReader; } private DataSet Getclass() { DataSet Classds=SqlHelper.ExecuteDataset(SqlDbObject.Connection,CommandType.StoredProcedure,"sp_News_GetClass"); return Classds; } private DataSet Getnclass() { DataSet Classds=SqlHelper.ExecuteDataset(SqlDbObject.Connection,CommandType.StoredProcedure,"sp_News_GetNClass"); return Classds; }private DataSet Getnclass(int classid){
SqlParameter[] parameter={new SqlParameter("@ClassID",SqlDbType.Int,4)};
parameter[0].Value=classid;
using(DataSet ds=SqlHelper.ExecuteDataset(SqlDbObject.Connection,CommandType.StoredProcedure,"Sp_News_GetNclassBYclassID",parameter))
{
return ds;
}
}
private void DataBinds() { DataTable dt=this.Getclass().Tables[0]; //获得大类列表 this.ClassID.DataSource=dt; this.ClassID.DataTextField="ClassName"; this.ClassID.DataValueField="ClassID"; this.ClassID.DataBind(); DataTable dtn=Getnclass(int.Parse(this.ClassID.SelectedValue)).Tables[0]; //根据大类列表默认选中项读出所属的小类列表 this.NclassID.DataSource=dtn; this.NclassID.DataTextField="Nclass"; this.NclassID.DataValueField="NclassID"; this.NclassID.DataBind(); }
Web 窗体设计器生成的代码 private void Button1_Click(object sender, System.EventArgs e) { Response.Write(Request.Params[1]); Response.Write("</br>"); Response.Write(Request.Params[2]); } }
}