Application对象
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Application对象是HttpApplicationState类的一个实例，它可以产生一个所有Web应用程序都可以存取的变量，这个变量的可以存取范围涵盖全部使用者，也就是说只要正在使用这个网页的程序都可以存取这个变量。
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新建一个网站，包括两个网页，代码如下：
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1、Index.aspx代码：
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<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Index.aspx.cs” Inherits=”Index” %>
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<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
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<html xmlns=”http://www.w3.org/1999/xhtml” >
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<head runat=”server”>
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<title>无标题页</title>
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</head>
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<body>
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<form id=”form1″ runat=”server”>
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<div>
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<table style=”width: 300px; height: 100px”>
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<tr>
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<td style=”width: 100px”>
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用户名：</td>
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<td style=”width: 246px”>
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<asp:TextBox ID=”TextBox1″ runat=”server”></asp:TextBox></td>
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</tr>
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<tr>
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<td style=”width: 100px”>
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密 码：</td>
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<td style=”width: 246px”>
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<asp:TextBox ID=”TextBox2″ runat=”server” TextMode=”Password”></asp:TextBox></td>
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</tr>
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<tr>
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<td style=”text-align: center;” colspan=”2″>
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<asp:Button ID=”Button1″ runat=”server” Text=”登录” onClick=”Button1_Click” /></td>
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</tr>
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</table>
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</div>
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</form>
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</body>
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</html>
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Index.aspx.cs代码：
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using System;
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using System.Data;
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using System.Configuration;
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using System.Collections;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Web.UI.HtmlControls;
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public partial class Index : System.Web.UI.Page
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{
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string strInfo;
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protected void Page_Load(object sender, EventArgs e)
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{
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}
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protected void Button1_Click(object sender, EventArgs e)
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{
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Application["Info"] = TextBox1.Text;
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strInfo = Application["Info"].ToString();
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if (TextBox1.Text == “admin” && TextBox2.Text == “admin”)
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{
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Session["name"] = TextBox1.Text;
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Response.Redirect(“Default.aspx?Info=” + strInfo + “”);//地址栏的传值
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}
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}
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}
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2、Default.aspx代码：
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<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”_Default” %>
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<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
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<html xmlns=”http://www.w3.org/1999/xhtml” >
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<head runat=”server”>
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<title>无标题页</title>
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</head>
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<body>
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<form id=”form1″ runat=”server”>
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<div>
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<table style=”width: 500px; height: 323px”>
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<tr>
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<td colspan=”2″>
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<asp:TextBox ID=”TextBox2″ runat=”server” Height=”314px” Width=”497px” TextMode=”MultiLine”></asp:TextBox></td>
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</tr>
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<tr>
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<td>
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<asp:Label ID=”Label1″ runat=”server” Text=”Label”></asp:Label>
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<asp:TextBox ID=”TextBox1″ runat=”server” Width=”390px”></asp:TextBox></td>
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<td>
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<asp:Button ID=”Button2″ runat=”server” Text=”发送” onClick=”Button2_Click” /></td>
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</tr>
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</table>
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</div>
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</form>
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</body>
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</html>
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Default.aspx.cs代码：
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using System;
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using System.Data;
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using System.Configuration;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Web.UI.HtmlControls;
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public partial class _Default : System.Web.UI.Page
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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Label1.Text = Session["name"].ToString();
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/*对象的增加
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Application.Add(“App1″, “Value1″);
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Application.Add(“App2″, “Value2″);
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Application.Add(“App3″, “Value3″);
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Response.Write(“Application对象的使用”);
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Response.Write(“<br>”);
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for (int i = 0; i < Application.Count; i++)
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{
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Response.Write(“变量名：” + Application.GetKey(i));
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Response.Write(“,值：” + Application[i] + “<p>”);
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Response.Write(“<br>”);
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}*/
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}
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protected void Button2_Click(object sender, EventArgs e)
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{
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Application["content"] = TextBox1.Text;
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TextBox2.Text = TextBox2.Text + “\\n” + Label1.Text + “说：” + Application["content"].ToString();
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}
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}
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