ChangePassword.DisplayUserName 屬性

參考

定義

命名空間:: System.Web.UI.WebControls

組件:: System.Web.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

取得或設定值，指出 ChangePassword 控制項是否應顯示 UserName 控制項和標籤。

public:
 virtual property bool DisplayUserName { bool get(); void set(bool value); };

public virtual bool DisplayUserName { get; set; }

member this.DisplayUserName : bool with get, set

Public Overridable Property DisplayUserName As Boolean

屬性值

Boolean

如果 ChangePassword 控制項應顯示 UserName，則為 true，否則為 false。預設為 false。

範例

下列程式代碼範例示範如何設定 DisplayUserName 屬性，將控件顯示 UserName 給未登入網站的使用者。

<%@ page language="C#"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  
  void Page_Load(object sender, EventArgs e )
  {
    if (Context.User.Identity.IsAuthenticated)
    {
      Changepassword1.DisplayUserName = false;
    }
  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ChangePassword.DisplayUserName sample.</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      User's login status: <asp:loginstatus id="status" runat="server" /><br />
      <asp:changepassword id="Changepassword1" runat="server" displayusername="true" />
    </div>
    </form>
</body>
</html>

<%@ page language="VB"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  
  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Context.User.Identity.IsAuthenticated Then
      changepassword1.DisplayUserName = False
    End If
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ChangePassword.DisplayUserName sample.</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      User's login status: <asp:loginstatus id="status" runat="server" /><br />
      <asp:changepassword id="Changepassword1" runat="server" displayusername="true" />
    </div>
    </form>
</body>
</html>

下列程式代碼範例示範如何使用使用 ChangePassword 控件的 ASP.NET 頁面，並包含名為 ChangingPassword之ChangingPassword事件的處理程式。處理程式中的 ChangingPassword 程式代碼會將儲存在屬性中的 CurrentPassword 舊密碼與儲存在中的 NewPassword新密碼進行比較。如果兩個密碼相同，變更密碼會失敗。

控制項 ChangePassword 會將 DisplayUserName 屬性設定為 true ，讓用戶能夠輸入其用戶名稱。這表示使用者不需要登入即可檢視頁面。

程式代碼範例假設 ASP.NET 網站已設定為使用 ASP.NET 成員資格和窗體驗證，而且已建立使用者的名稱和密碼已知。如需詳細資訊，請參閱如何：實作簡單窗體驗證。

<%@ Page Language="C#" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Load(Object sender, EventArgs e)
  {
    //Manually register the event-handling methods.
    ChangePassword1.ChangingPassword += new LoginCancelEventHandler(this._ChangingPassword);
  }

  void _ChangingPassword(Object sender, LoginCancelEventArgs e)
  {
    if (ChangePassword1.CurrentPassword.ToString() == ChangePassword1.NewPassword.ToString())
    {
      Message1.Visible = true;
      Message1.Text = "Old password and new password must be different.  Please try again.";
      e.Cancel = true;
    }
    else
    {
      //This line prevents the error showing up after a first failed attempt.
      Message1.Visible = false;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>ChangePassword including a ChangingPassword event handler</title>
</head>
<body>
  <form id="form1" runat="server">
  <div style="text-align:center">

    <h1>ChangePassword</h1>
    
    <asp:LoginView ID="LoginView1" Runat="server" 
      Visible="true">
      <LoggedInTemplate>
        <asp:LoginName ID="LoginName1" Runat="server" FormatString="You are logged in as {0}." />
        <br />
      </LoggedInTemplate>
      <AnonymousTemplate>
        You are not logged in
      </AnonymousTemplate>
    </asp:LoginView><br />
    
    <asp:ChangePassword ID="ChangePassword1" Runat="server"
      BorderStyle="Solid" 
      BorderWidth="1" 
      CancelDestinationPageUrl="~/Default.aspx" 
      DisplayUserName="true" 
      OnChangingPassword="_ChangingPassword"
      ContinueDestinationPageUrl="~/Default.aspx" >
    </asp:ChangePassword><br />
  
    <asp:Label ID="Message1" Runat="server" ForeColor="Red" /><br />

    <asp:HyperLink ID="HyperLink1" Runat="server" 
      NavigateUrl="~/Default.aspx">
      Home
    </asp:HyperLink>
    
  </div>
  </form>
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  Public Sub PageLoad(ByVal Sender As Object, ByVal e As EventArgs)
    'Manually register the event-handling methods.
    AddHandler ChangePassword1.ChangingPassword, AddressOf Me._ChangingPassword
  End Sub

  Public Sub _ChangingPassword(ByVal Sender As Object, ByVal e As LoginCancelEventArgs)
    If (ChangePassword1.CurrentPassword.ToString() = ChangePassword1.NewPassword.ToString) Then
      Message1.Visible = True
      Message1.Text = "Old password and new password must be different.  Please try again."
      e.Cancel = True
    Else
      'This line prevents the error showing up after a first failed attempt.
      Message1.Visible = False
    End If
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>ChangePassword including a ChangingPassword event handler</title>
</head>
<body>
  <form id="form1" runat="server">
  <div style="text-align:center">

    <h1>ChangePassword</h1>
    
    <asp:LoginView ID="LoginView1" Runat="server" 
      Visible="true">
      <LoggedInTemplate>
        <asp:LoginName ID="LoginName1" Runat="server" FormatString="You are logged in as {0}." />
        <br />
      </LoggedInTemplate>
      <AnonymousTemplate>
        You are not logged in
      </AnonymousTemplate>
    </asp:LoginView><br />
    
    <asp:ChangePassword ID="ChangePassword1" Runat="server"
      BorderStyle="Solid" 
      BorderWidth="1" 
      CancelDestinationPageUrl="~/Default.aspx" 
      DisplayUserName="true" 
      OnChangingPassword="_ChangingPassword"
      ContinueDestinationPageUrl="~/Default.aspx" >
    </asp:ChangePassword><br />
  
    <asp:Label ID="Message1" Runat="server" ForeColor="Red" /><br />

    <asp:HyperLink ID="HyperLink1" Runat="server" 
      NavigateUrl="~/Default.aspx">
      Home
    </asp:HyperLink>
    
  </div>
  </form>
</body>
</html>

備註

若要變更其密碼，用戶必須由成員資格提供者進行驗證。若要允許未登入的使用者變更其密碼，或由成員資格提供者使用不同的使用者帳戶進行驗證，然後變更該帳戶的密碼， ChangePassword 控件可以顯示 TextBox 控件以接受用戶名稱。

如果ChangePassword控件要顯示給未登入的使用者，您必須將 DisplayUserName 屬性true設定為，否則使用者將無法指定用戶名稱。

適用於

共用方式為

ChangePassword.DisplayUserName 屬性

定義

屬性值

範例

備註

適用於

另請參閱

其他資源