asp.net页面传值的五种方法:QueryString,Session,Application,Request.Cookies,Server.Transfer
其中Cookie和Server.Transfer两种方式不同于前面三种，Server.Transfer充分体现了面向对象思想。
首先新建webForm项目，然后添加WebForm1和WebForm2页面。
WebForm1.aspx页面客户端对象代码如下
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server" method="POST" action="WebForm1.aspx"> <label>用户名：</label> <input type="text" id="UserName" name="UserName"/><br/> <label>密码：</label> <input type="text" id="Pwd" name="Pwd"/><br/> <input type="submit" /> </form></body></html>WebForm1.aspx.cs代码如下
using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq; namespace WebApplication1{ public partial class WebForm1 : System.Web.UI.Page { string user; string pwd; public string UserName { get { return this.user; } } public string Pwd { get { return this.pwd; } } protected void Page_Load(object sender, EventArgs e) { //1.获取表单提交数据，使用QueryString获取提交过来的值，发送出去 #region //if (IsPostBack) //{ // string user = Request.Form["UserName"]; // string pwd = Request.Form["Pwd"]; // Response.Redirect("WebForm2.aspx?UserName=" + user + "&Pwd=" + pwd); //} #endregion //2.获取表单提交数据，使用Session获取提交过来的值，发送出去 #region //if (IsPostBack) //{ // string user = Request.Form["UserName"]; // string pwd = Request.Form["Pwd"]; // //string user = Request["UserName"]; // //Response.Write("<script>alert('" + user + pwd + "')</script>"); // if (!string.IsNullOrEmpty(user)) // { // Session["UserName"] = user; // Session["Pwd"] = pwd; // Response.Redirect("WebForm2.aspx"); // } //} #endregion //3.获取表单提交数据，使用Application获取提交过来的值，发送出去 #region //if (IsPostBack) //{ // string user = Request.Form["UserName"]; // string pwd = Request.Form["Pwd"]; ////string user = Request["UserName"]; ////Response.Write("<script>alert('" + user + pwd + "')</script>"); // if (!string.IsNullOrEmpty(user)) // { // Application["UserName"] = user; // Application["Pwd"] = pwd; // Response.Redirect("WebForm2.aspx"); // } //} #endregion //4.获取表单提交数据，使用Server.Transfer获取提交过来的值，发送出去 #region //if (IsPostBack) //{ // user = Request.Form["UserName"]; // pwd = Request.Form["Pwd"]; // //string user = Request["UserName"]; // //Response.Write("<script>alert('" + user + pwd + "')</script>"); // if (!string.IsNullOrEmpty(user)) // { // Server.Transfer("WebForm2.aspx"); // } //} #endregion //5.获取表单提交数据，使用HttpCookie获取提交过来的值，发送出去 #region //if (IsPostBack) //{ // string user = Request.Form["UserName"]; // string pwd = Request.Form["Pwd"]; // HttpCookie cookieName = new HttpCookie("UserName", user); // HttpCookie cookiePwd = new HttpCookie("Pwd", pwd); // Response.AppendCookie(cookieName); // Response.AppendCookie(cookiePwd); // Server.Transfer("WebForm2.aspx"); //} #endregion } }}WebForm2.aspx客户端无需修改，WebForm2.aspx.cs代码如下
using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq; namespace WebApplication1{ public partial class WebForm2 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //1.QueryString获取值 #region //string i = Request.QueryString["UserName"] + Request.QueryString["Pwd"]; ; //Response.Write("<script>alert('" + i + "')</script>"); #endregion //2.Session获取值 #region //string info = Session["UserName"].ToString() + Session["Pwd"].ToString(); //Response.Write("<script>alert('" + info + "')</script>"); #endregion //3.Application获取值 #region //string infos = Application["UserName"].ToString() + Application["Pwd"].ToString(); //Response.Write("<script>alert('" + infos + "')</script>"); #endregion //4.Server.Transfer获取值 #region //WebForm1 valuePage; //valuePage = (WebForm1)Context.Handler; //string a = valuePage.UserName + valuePage.Pwd; //Response.Write("<script>alert('" + a + "')</script>"); #endregion //5.Request.Cookies获取值(不同点是：①Cookies是存在于Request中的，②注意要加Cookies[]之后不要忘记加上.Value) #region //string c = Request.Cookies["UserName"].Value.ToString() + Request.Cookies["Pwd"].Value.ToString(); //Response.Write("<script>alert('"+c+"')</script>"); #endregion } }}