.NET内置对象之Application对象_[Asp.Net教程]

Application对象

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。

新建一个网站，包括两个网页，代码如下：

1、Index.aspx代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="Index" %>

用户名：

密 &nbsp;&nbsp; 码：

onClick="Button1_Click" />

Index.aspx.cs代码：

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class Index : System.Web.UI.Page

{

string strInfo;

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)

{

Application["Info"] = TextBox1.Text;

strInfo = Application["Info"].ToString();

if (TextBox1.Text == "admin" && TextBox2.Text == "admin")

{

Session["name"] = TextBox1.Text;

Response.Redirect("Default.aspx?Info=" + strInfo + "");//地址栏的传值

}

}

}

2、Default.aspx代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

&nbsp;

onClick="Button2_Click" />

Default.aspx.cs代码：

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

Label1.Text = Session["name"].ToString();

/*对象的增加

Application.Add("App1", "Value1");

Application.Add("App2", "Value2");

Application.Add("App3", "Value3");

Response.Write("Application对象的使用");

Response.Write("");

for (int i = 0; i < Application.Count; i++)

{

Response.Write("变量名：" + Application.GetKey(i));

Response.Write(",值：" + Application[i] + "

");

Response.Write("");

}*/

}

protected void Button2_Click(object sender, EventArgs e)

{

Application["content"] = TextBox1.Text;

TextBox2.Text = TextBox2.Text + "\n" + Label1.Text + "说：" + Application["content"].ToString();

}

}