當(dāng)訪問(wèn)默認(rèn)首頁(yè)default.aspx時(shí)，會(huì)自動(dòng)跳轉(zhuǎn)到login.aspx頁(yè)面上請(qǐng)求登錄，隨便輸入用戶(hù)名和密碼，點(diǎn)擊“登錄”按鈕，會(huì)回到首頁(yè)，并顯示當(dāng)前登錄的用戶(hù)名。

Web.config

復(fù)制代碼代碼如下:

<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

復(fù)制代碼代碼如下:

<HTML>
<HEAD>
<TITLE>首頁(yè)</TITLE>
<script language="VB" runat="server">
 Sub Page_Load(Sender As Object, e As EventArgs)
  Message.Text = String.Format("你好，{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="退出登錄" runat="server" OnClick="btnSignout_Click"/>
</form>
</BODY>
</HTML>

login.aspx

復(fù)制代碼代碼如下:

<HEAD>
<TITLE>首頁(yè)</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)
   FormsAuthentication.RedirectFromLoginPage(txtUsername.Text, true);
  else
   lblError.Text = "錯(cuò)誤的用戶(hù)名/密碼";
 }
</script>
</HEAD>
<BODY>
<form method="post" runat="server">
 <asp:Label id="lblUsername" runat="server" Text="用戶(hù)名："/>
 &nbsp;&nbsp;&nbsp;
 <asp:Textbox id="txtUsername" runat="server"/>
 <br>
 <br>
 <asp:Label id="lblPassword" runat="server" Text="密　碼："/>
 &nbsp;&nbsp;&nbsp;
 <asp:Textbox id="txtPassword" runat="server" TextMode="password"/>
 <br>
 <asp:button id="btnLogin" runat="server" Text="登錄" OnClick="btnLogin_Click" />
</form>
<hr>
 <br>
 <asp:Label id="lblError" forecolor="red" runat="server"/>
</BODY>
</HTML>