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ASP.NET Tutorial/Development/Application - История изменений
2026-04-29T21:32:02Z
История изменений этой страницы в вики
MediaWiki 1.30.0
http://nfex.ru/index.php?title=ASP.NET_Tutorial/Development/Application&diff=2627&oldid=prev
в 15:30, 26 мая 2010
2010-05-26T15:30:57Z
<p></p>
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<td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td>
<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 15:30, 26 мая 2010</td>
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http://nfex.ru/index.php?title=ASP.NET_Tutorial/Development/Application&diff=2628&oldid=prev
Admin: 1 версия
2010-05-26T11:56:32Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Application.Add==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.Add("Added", "AddedValue")<br />
Message.Text = Application(?Added?)<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.AllKeys==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Dim I as Integer<br />
Dim StateVars(Application.Count) As String<br />
StateVars = Application.AllKeys<br />
For I = 0 to StateVars.Length - 1 <br />
Message.Text = Message.Text + StateVars(I) + "<br/>"<br />
Next I<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Clear()==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.Clear()<br />
Message.Text = "There are " & Application.Count & _<br />
" items in the Application collection."<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Count==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.Clear()<br />
Application("foo") = "Hello, "<br />
Application("bar") = "World!"<br />
Message.Text = "The Application collection contains " & _<br />
Application.Count & " items. "<br />
Dim I as Integer<br />
For I = 0 To Application.Count - 1<br />
Message.Text &= Application(I)<br />
Next<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Get==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application("GetTest") = "Got it!"<br />
Message.Text = "GetTest = " & Application.Get("GetTest")<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.GetKey==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.RemoveAll()<br />
Application("GetKeyTest") = "Got it!"<br />
Message.Text = "Key of Application(0) = " & Application.GetKey(0) & "<br/>(Should be GetKeyTest)"<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Item==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.Clear()<br />
Application.Item("foo") = "foo"<br />
Application.Item("foo2") = "foo2"<br />
Message.Text = Application.Item("foo") & "<br/>"<br />
Message.Text &= Application.Item(1)<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Keys==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Dim Key As String<br />
Message.Text = "Application Keys:"<br />
For Each Key in Application.Keys<br />
Message.Text &= "<br/>Key:" & Key<br />
Message.Text &= "<br/>Value:" & Application(Key)<br />
Next<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Lock() (VB)==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %><br />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head runat="server"><br />
<title>Untitled Page</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
The page has been requested<br />
<asp:Label ID="myLabel" runat="server" /><br />
times!<br />
</div><br />
</form><br />
</body><br />
</html><br />
File: Default.aspx.vb<br />
<br />
Partial Class _Default<br />
Inherits System.Web.UI.Page<br />
Protected Sub Page_Load(ByVal sender As Object, _<br />
ByVal e As System.EventArgs) Handles Me.Load<br />
If Application("PageCounter") >= 10 Then<br />
Application.Remove("PageCounter")<br />
End If<br />
If Application("PageCounter") Is Nothing Then<br />
Application("PageCounter") = 1<br />
Else<br />
Application.Lock()<br />
Application("PageCounter") += 1<br />
Application.UnLock()<br />
End If<br />
myLabel.Text = Application("PageCounter")<br />
End Sub<br />
End Class</source><br />
<br />
<br />
<br />
== Application.Remove==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
If Not Application("foo") Is Nothing Then<br />
Application.Remove("foo")<br />
Message.Text = "Item "foo" was removed."<br />
Else<br />
Message.Text = "Item "foo" does not exist."<br />
End If<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.RemoveAll()==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
If Application.Count > 0 Then<br />
Application.RemoveAll()<br />
Message.Text = "Application collection cleared."<br />
Else<br />
Message.Text = "Application collection is already empty."<br />
End If<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.RemoveAt==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.RemoveAll()<br />
Application.RemoveAt(1)<br />
Dim I as Integer<br />
Dim StateVars(Application.Count) As String<br />
StateVars = Application.AllKeys<br />
For I = 0 to StateVars.Length - 1 <br />
Message.Text = Message.Text + StateVars(I) + " <br/>"<br />
Next I<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.Set==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.RemoveAll()<br />
Application.Set("TotallyNewVariable","Test!")<br />
myMessage.Text = "First: " + Application("TotallyNewVariable") + "<br/>"<br />
Application.Set("TotallyNewVariable","Test again!")<br />
myMessage.Text = myMessage.Text & "First after Set: " + _ <br />
Application("TotallyNewVariable") + "<br/>"<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="myMessage" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Application.UnLock()==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" %><br />
<html><br />
<head><br />
<script runat="server"><br />
Sub Page_Load()<br />
Application.Lock()<br />
Application("Counter") = 1<br />
Application.UnLock()<br />
Message.Text = "Counter = " & Application("Counter") <br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<asp:label id="Message" runat="server"/><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Basic Application Events==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
Event-Handling Method Description<br />
Application_Start() Occurs when the application starts<br />
which is the first time it receives a request from any user. <br />
Application_End() Occurs when the application is shutting down, generally because the web server is being restarted. <br />
Application_BeginRequest() Occurs with each request the application receives, just before the page code is executed.<br />
Application_EndRequest() Occurs with each request the application receives, just after the page code is executed.<br />
Session_Start() Occurs whenever a new user request is received and a session is started. <br />
Session_End() Occurs when a session times out or is programmatically ended.<br />
Application_Error() Occurs in response to an unhandled error.</source><br />
<br />
<br />
<br />
== Displaying a count of user sessions.==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" %><br />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"<br />
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><br />
<script runat="server"><br />
void Page_Load()<br />
{<br />
lblSessionCount.Text = Application["SessionCount"].ToString();<br />
}<br />
</script><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head id="Head1" runat="server"><br />
<title>Show Session Count</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
Total Application Sessions:<br />
<asp:Label<br />
id="lblSessionCount"<br />
Runat="server" /><br />
</div><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Lock the Application object==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><br />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head runat="server"><br />
<title>Untitled Page</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
The page has been requested<br />
<asp:Label ID="myLabel" runat="server" /><br />
times!<br />
</div><br />
</form><br />
</body><br />
</html><br />
File: Default.aspx.cs<br />
using System;<br />
using System.Data;<br />
using System.Configuration;<br />
using System.Web;<br />
using System.Web.Security;<br />
using System.Web.UI;<br />
using System.Web.UI.WebControls;<br />
using System.Web.UI.WebControls.WebParts;<br />
using System.Web.UI.HtmlControls;<br />
public partial class _Default : System.Web.UI.Page <br />
{<br />
protected void Page_Load(object sender, EventArgs e)<br />
{<br />
if (Application["PageCounter"] != null &&<br />
(int)Application["PageCounter"] >= 10)<br />
{<br />
Application.Remove("PageCounter");<br />
}<br />
if (Application["PageCounter"] == null)<br />
{<br />
Application["PageCounter"] = 1;<br />
}<br />
else<br />
{<br />
Application.Lock();<br />
Application["PageCounter"] =<br />
(int)Application["PageCounter"] + 1;<br />
Application.UnLock();<br />
}<br />
myLabel.Text = Convert.ToString(Application["PageCounter"]);<br />
}<br />
}</source><br />
<br />
<br />
<br />
== Save value to Application==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="VB" %><br />
<script runat="server"><br />
Sub Page_Load(Sender As Object, e As EventArgs)<br />
lblOutput.text = "Page loading" & _<br />
"Application started at: " & Application("Time") & "<br>" & _<br />
"Current time: " & DateTime.Now & "<br>"<br />
End Sub<br />
Sub Click(obj As Object, E As EventArgs)<br />
Session.Abandon()<br />
End Sub<br />
</script><br />
<html><body><br />
<form runat="server"><br />
<asp:label id="lblOutput" runat="server"/><br />
<asp:Button id="btSubmit" runat="server" OnClick="Click" Text="End This Session"/><br />
</form><br />
</body></html></source></div>
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