A simple ASP. NET Forms authentication

Source: Internet
Author: User
When you access the default homepage default. when aspx is used, login is automatically redirected. log on to the aspx page. Enter your username and password and click "log on" to return to the home page and display the username of the current logon.
Web. config
<Configuration>
<System. web>
<Compilation debug = "true"/>
<Authentication mode = "Forms">
<Forms loginUrl = "login. aspx" name = ". ASPXFORMSAUTH"/>
</Authentication>
<Authorization>
<Deny users = "? "/>
</Authorization>
</System. web>
</Configuration>
Default. aspx
<HTML>
<HEAD>
<TITLE> homepage </TITLE>
<Script language = "VB" runat = "server">
Sub Page_Load (Sender As Object, e As EventArgs)
Message. Text = String. Format ("Hello, {0}", Context. User. Identity. Name)
End Sub
Sub btnSignout_Click (Sender as Object, E as EventArgs)
FormsAuthentication. SignOut ()
Response. Redirect ("login. aspx ")
End sub
</Script>
</HEAD>
<BODY>
<Asp: label id = "Message" runat = "server"/>
<Br>
<Form method = "post" runat = "server">
<Asp: button id = "btnSignout" Text = "log out" runat = "server" OnClick = "btnSignout_Click"/>
</Form>
</BODY>
</HTML>
Login. aspx
<HEAD>
<TITLE> homepage </TITLE>
<Script lanugage = "c #" runat = "server">
Private void Page_Load (object sender, EventArgs e)
{
If (Request. IsAuthenticated)
Response. Redirect ("default. aspx ");
}
Void btnLogin_Click (Object sender, EventArgs e)
{
If (txtUsername. Text! = Null & txtUsername. Text! = String. Empty & txtPassword. Text! = Null & txtPassword. Text! = String. Empty)
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