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ASP.NET Tutorial/Page Lifecycle/Page Directives - История изменений
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в 15:30, 26 мая 2010
2010-05-26T15:30:57Z
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Admin: 1 версия
2010-05-26T11:59:59Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== ASP.NET Page Directives==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
Directive Description<br />
@Page Define page-specific attributes<br />
@Control Define control-specific attributes. <br />
@Import Import a namespace into a page. <br />
@Register Associate aliases with namespaces and class names<br />
@Assembly Link an assembly against the current page.<br />
@OutputCache Control the output caching policy for the page.</source><br />
<br />
<br />
<br />
== Debugging ASP.NET Pages==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" Debug="true" %><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 />
int zero = 0;<br />
Label1.Text = (1 / zero).ToString();<br />
}<br />
</script><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head id="Head1" runat="server"><br />
<title>Show Error</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
<asp:Label<br />
id="Label1"<br />
Runat="server" /><br />
</div><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Displaying a localized Calendar control.==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" Culture="id-ID" %><br />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"<br />
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head id="Head1" runat="server"><br />
<title>Show Calendar</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
<asp:Calendar<br />
id="Calendar1"<br />
Runat="server" /><br />
</div><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== EnableViewState="True"==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="vb" EnableViewState="True" %><br />
<html><br />
<head><br />
<title></title><br />
<script runat="server"><br />
Sub Page_Load()<br />
If Page.EnableViewState = True Then<br />
Message.Text = "ViewState is enabled."<br />
Else<br />
Message.Text = "ViewState is disabled."<br />
End If<br />
End Sub<br />
</script><br />
</head><br />
<body><br />
<form runat="server"><br />
<asp:label id="Message" runat="server"/><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== In page derivative, set trace to true==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" Trace="true" %><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 />
Label1.Text = "nfex!";<br />
Calendar1.TodaysDate = DateTime.Now;<br />
}<br />
</script><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head id="Head1" runat="server"><br />
<title>Show Trace</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
<asp:Label<br />
id="Label1"<br />
Runat="server" /><br />
<asp:Calendar<br />
id="Calendar1"<br />
TodayDayStyle-BackColor="Yellow"<br />
Runat="server" /><br />
</div><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Master page==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page MasterPageFile="Default.master" %><br />
<asp:Content id="myContent" runat="server"<br />
ContentPlaceHolderID="FrontPageContent"><br />
Welcome to our web site! We hope you"ll enjoy your visit.<br />
</asp:Content><br />
<br />
File: Default.master<br />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"<br />
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <br />
<html><br />
<head><br />
<title>Front Page</title><br />
</head><br />
<body><br />
<form id="myForm" runat="server"><br />
<h1>Welcome to SuperSite Inc!</h1><br />
<asp:ContentPlaceHolder id="FrontPageContent"<br />
runat="server" /><br />
<pre>Copyright 2006</pre><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Session State - Disabled==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page EnableSessionState = "false" %><br />
<script runat="server" ><br />
Public Sub Page_Load<br />
Session("MySession") = "My Session Value"<br />
Response.Write( Session("MySession") )<br />
End Sub<br />
</script><br />
<HTML><br />
<form id="Form1" runat="server"><br />
When EnableSessionState = "false" Session State is not accessible - this page generates an exception.<br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Session State - Readonly==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page EnableSessionState = "ReadOnly" %><br />
<script runat="server" ><br />
Public Sub Page_Load<br />
Response.Write( Session("MySession") )<br />
Session("MySession") = "My Session Value"<br />
End Sub<br />
</script><br />
<HTML><br />
<form id="Form1" runat="server"><br />
A session state value is set, but is not persisted when EnableSessionState = "ReadOnly".<br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Setting a Culture Manually==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" Culture="id-ID" UICulture="id-ID" %><br />
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"<br />
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><br />
<script runat="server"><br />
void Page_Load()<br />
{<br />
lblDate.Text = DateTime.Now.ToString("D");<br />
lblPrice.Text = (512.33m).ToString("c");<br />
}<br />
</script><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head id="Head1" runat="server"><br />
<title>Bagus</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
Today"s date is:<br />
<br /><br />
<asp:Label<br />
id="lblDate"<br />
Runat="server" /><br />
<hr /><br />
The price of the product is:<br />
<br /><br />
<asp:Label<br />
id="lblPrice"<br />
Runat="server" /><br />
</div><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Take advantage of page-level tracing==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="csharp"><br />
<%@ Page Language="C#" Trace="true" %><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 />
for (int counter = 0; counter < 10; counter++)<br />
{<br />
ListBox1.Items.Add("item " + counter.ToString());<br />
Trace.Warn("counter=" + counter.ToString());<br />
}<br />
}<br />
</script><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head id="Head1" runat="server"><br />
<title>Page Trace</title><br />
</head><br />
<body><br />
<form id="form1" runat="server"><br />
<div><br />
<asp:ListBox<br />
id="ListBox1"<br />
Runat="server" /><br />
</div><br />
</form><br />
</body><br />
</html></source></div>
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