ASP.NET通过更改Url进行页面传值的实现代码

这里，通过假数据，手动创建的一个类，然后创建的一个集合，放入下拉框，选好值以后，点确定
会在另一个页面产生对应的id

创建一个类：

using System;using System.Collections.Generic;using System.Linq;using System.Web;namespace WebApplication1{public class Dept{public int Id { get; set; }public string DeptName { get; set; }}}

一个选择的web窗体

<%@ Page Language=\"C#\" AutoEventWireup=\"true\" CodeBehind=\"Dept.aspx.cs\" Inherits=\"WebApplication1.Dept1\" %><!DOCTYPE html><html xmlns=\"http://www.w3.org/1999/xhtml\"><head runat=\"server\"><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/><title></title></head><body><form id=\"form1\" runat=\"server\"><div><asp:DropDownList ID=\"DropDownList1\" runat=\"server\" AutoPostBack=\"true\"></asp:DropDownList></div><p>><a href=\"dept_<%=DropDownList1.SelectedValue %>.html\" rel=\"external nofollow\" >查询</a></p></form></body></html>

选择的web窗体的后台代码

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace WebApplication1{public partial class Dept1 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){LoadDeptData();}}private void LoadDeptData(){//手动创建数据List<Dept> depts = new List<Dept>{new Dept{Id=1,DeptName=\"小明\"},new Dept{Id=2,DeptName=\"小王\"},new Dept{Id=3,DeptName=\"小李\"}};this.DropDownList1.DataSource = depts;//默认显示的值this.DropDownList1.DataTextField = \"DeptName\";this.DropDownList1.DataValueField = \"Id\";//保存this.DropDownList1.DataBind();}}}

建一个继承Modules类

using System;using System.Collections.Generic;using System.Linq;using System.Text.RegularExpressions;using System.Web;namespace WebApplication1.Modules{public class DeptModule : IHttpModule{public void Dispose(){}public void Init(HttpApplication context){context.BeginRequest += Context_BeginRequest;}private void Context_BeginRequest(object sender, EventArgs e){//处理请求//获取请求urlHttpApplication application = sender as HttpApplication;//相对路径string url = application.Request.RawUrl;//一个正则，用来匹配是不是相对应的页面Regex regex = new Regex(@\"dept_(\\d+).html\");//正则的匹配后的，微软给铺好的路，正则匹配后的一个数组；GroupCollection groupCollection = regex.Match(url).Groups;//这里取得是数组的第一个值，看看是不是成功匹配了，if (groupCollection[0].Success){//取到第二个值var id = groupCollection[1].Value.Trim(\'_\');//存储id，等用到的时候直接去第二个页面去取值HttpContext.Current.RewritePath(\"~/DeptDetail.aspx\",\"\",\"deptid=\"+id);}}}}

建完了类，要进入配置文件进行配置
因为我这里是放在一个文件夹下面了，所以配置文件指定type的时候，要加一个文件夹的路径

<system.webServer><modules><add name=\"Module\" type=\"WebApplication1.Modules.DeptModule\"/></modules></system.webServer>

显示的web窗体

<%@ Page Language=\"C#\" AutoEventWireup=\"true\" CodeBehind=\"DeptDetail.aspx.cs\" Inherits=\"WebApplication1.DeptDetail\" %><!DOCTYPE html><html xmlns=\"http://www.w3.org/1999/xhtml\"><head runat=\"server\"><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/><title></title></head><body><form id=\"form1\" runat=\"server\"><div><asp:TextBox ID=\"TextBox1\" runat=\"server\"></asp:TextBox></div></form></body></html>

显示的web窗体的后台代码

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace WebApplication1{public partial class DeptDetail : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){//直接通过request获取Module存入的idthis.TextBox1.Text = $\"{Request.QueryString[\"deptid\"]}\";}}}}

效果图

选择一个后点击查询