Fill and access Application-level data
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Font-Size="X-Large" Text="Fun with Application State"></asp:Label><br />
<asp:Button ID="btnShowAppVariables" runat="server" OnClick="btnShowAppVariables_Click"
Text="Show App Variables" /><br />
<br />
<asp:Label ID="lblAppVariables" runat="server"></asp:Label><br />
<br />
<br />
<asp:Button ID="btnSetNewSP" runat="server" OnClick="btnSetNewSP_Click" Text="Set New Sales Person" />
<asp:TextBox ID="txtNewSP" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
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 btnShowAppVariables_Click(object sender, EventArgs e)
{
Car appVars = ((Car)Application["CarSiteInfo"]);
string appState = string.Format("<li>Car on sale: {0}</li>",appVars.currentName);
appState += string.Format("<li>Popular color: {0}</li>",appVars.popularName);
appState += string.Format("<li>SalesPerson: {0}</li>",appVars.firstName);
lblAppVariables.Text = appState;
}
protected void btnSetNewSP_Click(object sender, EventArgs e)
{
((Car)Application["CarSiteInfo"]).firstName = txtNewSP.Text;
}
}
File: Global.asax
<%@ Application Language="C#" %>
<script runat="server">
void Application_Start(Object sender, EventArgs e) {
Application["CarSiteInfo"] = new Car("Chucky", "Colt", "Black");
}
void Application_End(Object sender, EventArgs e) {
// Code that runs on application shutdown
}
void Application_Error(Object sender, EventArgs e) {
// Code that runs when an unhandled error occurs
}
void Session_Start(Object sender, EventArgs e) {
// Code that runs when a new session is started
}
void Session_End(Object sender, EventArgs e) {
// Code that runs when a session ends.
// Note: The Session_End event is raised only when the sessionstate mode
// is set to InProc in the Web.config file. If session mode is set to StateServer
// or SQLServer, the event is not raised.
}
</script>
File: ~\App_Code\Car.cs
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 class Car
{
public Car(string s, string c, string m)
{
firstName = s;
currentName = c;
popularName = m;
}
public string firstName;
public string currentName;
public string popularName;
}
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