ASP.NET通过更改Url进行页面传值的实现代码

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; }
 }
}

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Dept.aspx.cs" Inherits="WebApplication1.Dept1" %>






 


 
  

   

   
  
  
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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 depts = new List
   {
    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();
  }
 }
}

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url
   HttpApplication 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);

   }
  }
 }
}

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DeptDetail.aspx.cs" Inherits="WebApplication1.DeptDetail" %>






 


 
  

   
  
 

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id
    this.TextBox1.Text = $"{Request.QueryString["deptid"]}";
   }
  }
 }
}