Membership.GetUserNameByEmail(String) 方法
定義
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。
取得使用者名稱,其中使用者的電子郵件地址與指定的電子郵件地址相符。
public:
static System::String ^ GetUserNameByEmail(System::String ^ emailToMatch);
public static string GetUserNameByEmail (string emailToMatch);
static member GetUserNameByEmail : string -> string
Public Shared Function GetUserNameByEmail (emailToMatch As String) As String
參數
- emailToMatch
- String
要搜尋的電子郵件地址。
傳回
使用者電子郵件地址與指定之電子郵件地址相符的使用者名稱。 如果找不到符合的項目,就會傳回 null
。
範例
下列程式代碼範例會擷取指定電子郵件地址的用戶名稱。
重要
此範例包含一個文本框,可接受用戶輸入,這是潛在的安全性威脅。 根據預設,ASP.NET Web 網頁會驗證使用者輸入未包含指令碼或 HTML 項目。 如需詳細資訊,請參閱 Script Exploits Overview (指令碼攻擊概觀)。
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
public void Search_OnClick(object sender, EventArgs args)
{
string username = Membership.GetUserNameByEmail(EmailTextBox.Text);
if (username == null)
{
Msg.Text = "Email address " + Server.HtmlEncode(EmailTextBox.Text) + " is not found. Please reenter.";
}
else
{
Msg.Text = "The user name for " + Server.HtmlEncode(EmailTextBox.Text) +
" is " + Server.HtmlEncode(username) + ".";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Retrieve Username By Email</title>
</head>
<body>
<form id="form1" runat="server">
<h3>Forgot your Username? Search for it by email address.</h3>
<asp:Label id="Msg" runat="server" ForeColor="maroon" /><br />
Email address: <asp:Textbox id="EmailTextBox" Columns="30" runat="server" />
<asp:RequiredFieldValidator id="EmailRequiredValidator" runat="server"
ControlToValidate="EmailTextBox" ForeColor="red"
Display="Static" ErrorMessage="Required" /><br />
<asp:Button id="SearchButton" Text="Search"
OnClick="Search_OnClick" runat="server" />
</form>
</body>
</html>
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!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 Search_OnClick(sender As Object, args As EventArgs)
Dim username As String = Membership.GetUserNameByEmail(EmailTextBox.Text)
If username Is Nothing Then
Msg.Text = "Email address " & Server.HtmlEncode(EmailTextBox.Text) & " is not found. Please reenter."
Else
Msg.Text = "The user name for " & Server.HtmlEncode(EmailTextBox.Text) & _
" is " & Server.HtmlEncode(username) & "."
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Retrieve Username By Email</title>
</head>
<body>
<form id="form1" runat="server">
<h3>Forgot your Username? Search for it by email address.</h3>
<asp:Label id="Msg" runat="server" ForeColor="maroon" /><br />
Email address: <asp:Textbox id="EmailTextBox" Columns="30" runat="server" />
<asp:RequiredFieldValidator id="EmailRequiredValidator" runat="server"
ControlToValidate="EmailTextBox" ForeColor="red"
Display="Static" ErrorMessage="Required" /><br />
<asp:Button id="SearchButton" Text="Search"
OnClick="Search_OnClick" runat="server" />
</form>
</body>
</html>
備註
GetUserNameByEmail 在使用者不知道其用戶名稱,但知道其電子郵件地址的情況下,可用來擷取成員資格使用者的用戶名稱。 如果數據存放區中的多個使用者具有相同的電子郵件位址,則會傳回第一個用戶名稱。
前置和尾端空格會從所有參數值修剪。