内置对象：
1、Response - 响应请求对象
Response.Redirect("Default2.aspx"); //重定向
Response.Write("<script>window.open('Default2.aspx');</script>");
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //Button1.Click += Button1_Click;//委托写法 } //void Button1_Click(object sender, EventArgs e) //{ // //Response.Redirect("Default2.aspx?aaa="+TextBox1.Text+""); //Redirect 页面重订项。 // //Response.Write("hehe");//手动输出 // //Response.Write("<script>widow.open('Default2.aspx')</sccript>");//直接在界面上输出内容。 //} }
2、Request - 接收请求对象
Request["键"] - 放在等号右边，用来取值
服务器控 件是根据ID来作为键
表单元素 是根据name值来作为键
QueryString - 页面地址拼接数据
如：Default2.aspx?aaa=呵呵&bbb=嘿嘿&ccc=hoho
1.后台Response.Redirect("Default2.aspx?key="+值);
2.Form表单会通过submit按钮自动提交数据，将数据提交给action设置的页面中去，method=“get”方式来提交
method 提交方式
action 目标页面
get提交方式
post提交方式 - 直接数据提交方式
除了不在地址栏拼接数据，其它的没有任何区别
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default2 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { TextBox1.Text = Request["user"] + "////" + Request["pwd"]; } }
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> <!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>
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3、Session
就是一个临时保存数据的对象，保存在服务器
可以理解为容器，变量
可以存Object类型，一个连接为独立的一组，默认生命周期为20分钟，如果在这20分钟内重新进行数据提交或是页面刷新，都会重置这20分钟倒计时时间。
如果Session["键"]里面没有内容的时候，使用时会抛出异常，所以一定要在使用session的值之前判断此是否为空。
注意：Session不要过度使用，因为放的东西太大了，用户连接多了就会导致内存溢出，服务器崩溃；也不要不使用，会造成资源浪费，因为内存中的数据是最快速的；
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default11.aspx.cs" Inherits="Default11" %> <!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><br /> <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br /> <asp:Button ID="Button1" runat="server" Text="登陆" /><br /> <asp:CheckBox ID="CheckBox1" runat="server" Text="7天自动登陆" /> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default11 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Button1.Click += Button1_Click; } void Button1_Click(object sender, EventArgs e) { if (TextBox1.Text == "zhangsan" && TextBox2.Text == "123") { //1、记住当前用户的登陆状态 Response.Cookies.Add(new HttpCookie("UserName", TextBox1.Text)); Response.Cookies["Pwd"].Value = TextBox2.Text; //2、是否需要长时间保存 if (CheckBox1.Checked) { Response.Cookies["UserName"].Expires = DateTime.Now.AddDays(7); Response.Cookies["Pwd"].Expires = DateTime.Now.AddDays(7); } Response.Redirect("Default12.aspx"); } else { } } }
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default12.aspx.cs" Inherits="Default12" %> <!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> <h1>cookie使用的主界面</h1> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label> <asp:Button ID="Button1" runat="server" Text="Button" /> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default12 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Button1.Click += Button1_Click; if (Request.Cookies["UserName"] != null) { Label1.Text = Request.Cookies["UserName"].Value + "，欢迎你回来！你的密码是：" + Request.Cookies["Pwd"].Value; Label2.Text = "当前版本号：" + Application.Get("aaa").ToString(); } else { Response.Redirect("Default11.aspx"); } } void Button1_Click(object sender, EventArgs e) { Response.Cookies["UserName"].Expires = DateTime.Now.AddDays(-2); Response.Cookies["Pwd"].Expires = DateTime.Now.AddDays(-2); Response.Redirect("Default11.aspx"); } }
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default13.aspx.cs" Inherits="Default13" %> <!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> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default13 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Application["aaa"] = "V1.0"; } }
4、cookie
临时保存数据的一个对象，保存在客户端
不要保存很重要的信息，因为会随时被用户删掉，有些程序会自动抓取用户电脑上的cookie信息，如果密码保存进去了，就会被抓取到
赋值：使用Response对象
1、Response.Cookies.Add(new HttpCookie("键", 值));
2、Response.Cookies["键"].Value = 值;
3、制作持久Cookie ：
Response.Cookies["键"].Expires = DateTime.Now.AddDays(7);//设置7天后过期
取值：使用Request对象
Request.Cookies["UserName"].Value
5、Appliction
临时保存数据的一个对象，保存在服务器端
全局变量
所有人访问的都是同一个对象
赋值：
Application["键"] = 值;
取值：
Application.Get("键")
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default1.aspx.cs" Inherits="Default1" %> <!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" method="post" action="Default2.aspx" runat="server"> <div> <asp:TextBox ID="user" runat="server"></asp:TextBox><br /> <asp:TextBox ID="pwd" runat="server"></asp:TextBox><br /> <%--?user=zhi&pwd=zhi--%> <input type="submit" value="提交" /> </div> </form> </body> </html>
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> <!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"> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default2 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Label1.Text = Application.Get("aaa").ToString(); } }
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %> <!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><br /> <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br /> <asp:Button ID="Button1" runat="server" Text="Button" /> <asp:Label ID="Label1" runat="server" Text=""></asp:Label> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default3 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Button1.Click += Button1_Click; } void Button1_Click(object sender, EventArgs e) { if (TextBox1.Text.Trim() == "zhangsan" && TextBox2.Text.Trim() == "1234") { Session["username"] = TextBox1.Text; Response.Redirect("Default4.aspx"); } else { Label1.Text = "用户名密码错误！"; } } }
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default4.aspx.cs" Inherits="Default4" %> <!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> <h1>这是主界面</h1> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br /> <asp:Button ID="Button1" runat="server" Text="退出登陆" /> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default4 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Button1.Click += Button1_Click; if (Session["username"] != null) { Label1.Text = Session["username"].ToString() + ",欢迎回来！"; } else { Response.Redirect("Default3.aspx"); } } void Button1_Click(object sender, EventArgs e) { Session["username"] = null; Response.Redirect("Default3.aspx"); } }
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default5.aspx.cs" Inherits="Default5" %> <!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> <h1>这是子界面</h1> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </div> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default5 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Session["username"] != null) { Label1.Text = Session["username"].ToString() + ",欢迎回来！"; } } }