.NET内置对象之Application对象

来源：互联网发布：苏亚雷斯2016年数据编辑：程序博客网时间：2024/06/06 08:30

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" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<tr>

用户名：</td>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></td>

</tr>

<tr>

密    码：</td>

<asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox></td>

</tr>

<tr>

<asp:Button ID="Button1" runat="server" Text="登录" OnClick="Button1_Click" /></td>

</tr>

</table>

</div>

</form>

</body>

</html>

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" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<tr>

<asp:TextBox ID="TextBox2" runat="server" Height="314px" Width="497px" TextMode="MultiLine"></asp:TextBox></td>

</tr>

<tr>

<td>

<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

<asp:TextBox ID="TextBox1" runat="server" Width="390px"></asp:TextBox></td>

<td>

<asp:Button ID="Button2" runat="server" Text="发送" OnClick="Button2_Click" /></td>

</tr>

</table>

</div>

</form>

</body>

</html>

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("<br>");

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

{

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

Response.Write(",值：" + Application[i] + "<p>");

Response.Write("<br>");

}*/

}

protected void Button2_Click(object sender, EventArgs e)

{

Application["content"] = TextBox1.Text;

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

}