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ASP.NET利用JavaScript实现无刷新闪烁二级联动菜单

2008-01-30 14:35 866 查看

---------------------------------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>

</HEAD>

<body>

<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>

-----------------------------------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;

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 +="<";

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#region Web 窗体设计器生成的代码

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.Button1.Click += new System.EventHandler(this.Button1_Click);

this.Load += new System.EventHandler(this.Page_Load);

}

#endregion

private void Button1_Click(object sender, System.EventArgs e)

{

Response.Write(Request.Params[1]);

Response.Write("</br>");

Response.Write(Request.Params[2]);

}

只是把写asp用的移值到asp.net中来!.

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