共用方式為

MembershipUser.ResetPassword 方法

  • 參考

定義

命名空間:
System.Web.Security
組件:
System.Web.dll
組件:
System.Web.ApplicationServices.dll

將使用者的密碼重設為自動產生的新密碼。

多載

ResetPassword()

將使用者的密碼重設為自動產生的新密碼。
ResetPassword(String)

將使用者的密碼重設為自動產生的新密碼。

ResetPassword()

將使用者的密碼重設為自動產生的新密碼。

public:
 virtual System::String ^ ResetPassword();
public virtual string ResetPassword ();
abstract member ResetPassword : unit -> string
override this.ResetPassword : unit -> string
Public Overridable Function ResetPassword () As String

傳回

String

成員資格使用者的新密碼。

例外狀況

PlatformNotSupportedException

這個方法無法使用。 如果應用程式以 .NET Framework 4 用戶端配置檔為目標，就會發生這種情況。 若要避免這個例外狀況，請覆寫方法，或將應用程式變更為以完整版本的 .NET Framework 為目標。

範例

下列程式代碼範例會重設用戶的密碼，並傳回新的自動產生密碼。 請注意， RequiresQuestionAndAnswer 假設 為 false。

重要

此範例包含接受使用者輸入的文本框，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">

MembershipUser u;

public void Page_Load(object sender, EventArgs args)
{
  if (!Membership.EnablePasswordReset)
  {
    FormsAuthentication.RedirectToLoginPage();
  }

  Msg.Text = "";

  if (!IsPostBack)
  {
    Msg.Text = "Please supply a username.";
  }
  else
  {
    VerifyUsername();
  }
}


public void VerifyUsername()
{
    u = Membership.GetUser(UsernameTextBox.Text, false);

    if (u == null)
    {
      Msg.Text = "Username " + Server.HtmlEncode(UsernameTextBox.Text) + " not found. Please check the value and re-enter.";

      ResetPasswordButton.Enabled = false;
    }
    else
    {
      ResetPasswordButton.Enabled = true;
    }
}

public void ResetPassword_OnClick(object sender, EventArgs args)
{
  string newPassword;

  u = Membership.GetUser(UsernameTextBox.Text, false);

  if (u == null)
  { 
    Msg.Text = "Username " + Server.HtmlEncode(UsernameTextBox.Text) + " not found. Please check the value and re-enter.";
    return;
  }

  try
  {
    newPassword = u.ResetPassword();
  }
  catch (MembershipPasswordException e)
  {
    Msg.Text = "Invalid password answer. Please re-enter and try again.";
    return;
  }
  catch (Exception e)
  {
    Msg.Text = e.Message;
    return;
  }

  if (newPassword != null)
  {
    Msg.Text = "Password reset. Your new password is: " + Server.HtmlEncode(newPassword);
  }
  else
  {
    Msg.Text = "Password reset failed. Please re-enter your values and try again.";
  }
}


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Reset Password</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Retrieve Password</h3>

  <asp:Label id="Msg" runat="server" ForeColor="maroon" /><br />

  Username: <asp:Textbox id="UsernameTextBox" Columns="30" runat="server" AutoPostBack="true" />
            <asp:RequiredFieldValidator id="UsernameRequiredValidator" runat="server"
                                        ControlToValidate="UsernameTextBox" ForeColor="red"
                                        Display="Static" ErrorMessage="Required" /><br />

  <asp:Button id="ResetPasswordButton" Text="Reset Password" 
              OnClick="ResetPassword_OnClick" runat="server" Enabled="false" />

</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">

Dim u As MembershipUser

Public Sub Page_Load(sender As Object, args As EventArgs)
  If Not Membership.EnablePasswordReset Then
    FormsAuthentication.RedirectToLoginPage()
  End If

  Msg.Text = ""

  If Not IsPostBack Then
    Msg.Text = "Please supply a username."
  Else
    VerifyUsername()
  End If
End Sub

Public Sub VerifyUsername()
    u = Membership.GetUser(UsernameTextBox.Text, False)

    If u Is Nothing Then
      Msg.Text = "Username " & Server.HtmlEncode(UsernameTextBox.Text) & " not found. Please check the value and re-enter."

      ResetPasswordButton.Enabled = False
    Else
      ResetPasswordButton.Enabled = True
    End If
End Sub

Public Sub ResetPassword_OnClick(sender As Object, args As EventArgs)
  Dim newPassword As String
  u = Membership.GetUser(UsernameTextBox.Text, False)

  If u Is Nothing Then
    Msg.Text = "Username " & Server.HtmlEncode(UsernameTextBox.Text) & " not found. Please check the value and re-enter."
    Return
  End If

  Try
    newPassword = u.ResetPassword()
  Catch e As MembershipPasswordException
    Msg.Text = "Invalid password answer. Please re-enter and try again."
    Return
  Catch e As Exception
    Msg.Text = e.Message
    Return
  End Try

  If Not newPassword Is Nothing Then
    Msg.Text = "Password reset. Your new password is: " & Server.HtmlEncode(newPassword)
  Else
    Msg.Text = "Password reset failed. Please re-enter your values and try again."
  End If
End Sub


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Reset Password</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Retrieve Password</h3>

  <asp:Label id="Msg" runat="server" ForeColor="maroon" /><br />

  Username: <asp:Textbox id="UsernameTextBox" Columns="30" runat="server" AutoPostBack="True" />
            <asp:RequiredFieldValidator id="UsernameRequiredValidator" runat="server"
                                        ControlToValidate="UsernameTextBox" ForeColor="red"
                                        Display="Static" ErrorMessage="Required" /><br />

  <asp:Button id="ResetPasswordButton" Text="Reset Password" 
              OnClick="ResetPassword_OnClick" runat="server" Enabled="False" />

</form>

</body>
</html>

備註

ResetPasswordMembershipProvider.ResetPassword會呼叫 屬性所ProviderName參考的成員資格提供者方法，將成員資格使用者的密碼重設為新的自動產生密碼。 然後，新的密碼會傳回給呼叫端。

如果 EnablePasswordReset 為 false，則成員資格提供者會傳回例外狀況。

如果 RequiresQuestionAndAnswer 為 true，您必須使用採用 ResetPassword 密碼回應做為參數的多載，併為成員資格使用者提供密碼答案。 如果需要密碼答案，並提供不正確的密碼答案， MembershipPasswordException 成員資格提供者會擲回 。

另請參閱

適用於

ResetPassword(String)

將使用者的密碼重設為自動產生的新密碼。

public:
 virtual System::String ^ ResetPassword(System::String ^ passwordAnswer);
public virtual string ResetPassword (string passwordAnswer);
abstract member ResetPassword : string -> string
override this.ResetPassword : string -> string
Public Overridable Function ResetPassword (passwordAnswer As String) As String

參數

passwordAnswer
String

成員資格使用者的密碼解答。

傳回

String

成員資格使用者的新密碼。

例外狀況

PlatformNotSupportedException

這個方法無法使用。 如果應用程式以 .NET Framework 4 用戶端配置檔為目標，就會發生這種情況。 若要避免這個例外狀況，請覆寫方法，或將應用程式變更為以完整版本的 .NET Framework 為目標。

範例

下列程式代碼範例會重設用戶的密碼，並傳回新的自動產生密碼。

重要

此範例包含接受使用者輸入的文本框，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">

MembershipUser u;

public void Page_Load(object sender, EventArgs args)
{
  if (!Membership.EnablePasswordReset)
  {
    FormsAuthentication.RedirectToLoginPage();
  }

  Msg.Text = "";

  if (!IsPostBack)
  {
    Msg.Text = "Please supply a username.";
  }
  else
  {
    VerifyUsername();
  }
}


public void VerifyUsername()
{
    u = Membership.GetUser(UsernameTextBox.Text, false);

    if (u == null)
    {
      Msg.Text = "Username " + Server.HtmlEncode(UsernameTextBox.Text) + " not found. Please check the value and re-enter.";

      QuestionLabel.Text = "";
      QuestionLabel.Enabled = false;
      AnswerTextBox.Enabled = false;
      ResetPasswordButton.Enabled = false;
    }
    else
    {
      QuestionLabel.Text = u.PasswordQuestion;
      QuestionLabel.Enabled = true;
      AnswerTextBox.Enabled = true;
      ResetPasswordButton.Enabled = true;
    }
}

public void ResetPassword_OnClick(object sender, EventArgs args)
{
  string newPassword;
  u = Membership.GetUser(UsernameTextBox.Text, false);

  if (u == null)
  { 
    Msg.Text = "Username " + Server.HtmlEncode(UsernameTextBox.Text) + " not found. Please check the value and re-enter.";
    return;
  }

  try
  {
    newPassword = u.ResetPassword(AnswerTextBox.Text);
  }
  catch (MembershipPasswordException e)
  {
    Msg.Text = "Invalid password answer. Please re-enter and try again.";
    return;
  }
  catch (Exception e)
  {
    Msg.Text = e.Message;
    return;
  }

  if (newPassword != null)
  {
    Msg.Text = "Password reset. Your new password is: " + Server.HtmlEncode(newPassword);
  }
  else
  {
    Msg.Text = "Password reset failed. Please re-enter your values and try again.";
  }
}


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Reset Password</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Retrieve Password</h3>

  <asp:Label id="Msg" runat="server" ForeColor="maroon" /><br />

  Username: <asp:Textbox id="UsernameTextBox" Columns="30" runat="server" AutoPostBack="true" />
            <asp:RequiredFieldValidator id="UsernameRequiredValidator" runat="server"
                                        ControlToValidate="UsernameTextBox" ForeColor="red"
                                        Display="Static" ErrorMessage="Required" /><br />

  Password Question: <b><asp:Label id="QuestionLabel" runat="server" /></b><br />

  Answer: <asp:TextBox id="AnswerTextBox" Columns="60" runat="server" Enabled="false" />
          <asp:RequiredFieldValidator id="AnswerRequiredValidator" runat="server"
                                      ControlToValidate="AnswerTextBox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" Enabled="false" /><br />

  <asp:Button id="ResetPasswordButton" Text="Reset Password" 
              OnClick="ResetPassword_OnClick" runat="server" Enabled="false" />

</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">

Dim u As MembershipUser

Public Sub Page_Load(sender As Object, args As EventArgs)
  If Not Membership.EnablePasswordReset Then
    FormsAuthentication.RedirectToLoginPage()
  End If

  Msg.Text = ""

  If Not IsPostBack Then
    Msg.Text = "Please supply a username."
  Else
    VerifyUsername()
  End If
End Sub

Public Sub VerifyUsername()
    u = Membership.GetUser(UsernameTextBox.Text, False)

    If u Is Nothing Then
      Msg.Text = "Username " & Server.HtmlEncode(UsernameTextBox.Text) & " not found. Please check the value and re-enter."

      QuestionLabel.Text = ""
      QuestionLabel.Enabled = False
      AnswerTextBox.Enabled = False
      ResetPasswordButton.Enabled = False
    Else
      QuestionLabel.Text = u.PasswordQuestion
      QuestionLabel.Enabled = True
      AnswerTextBox.Enabled = True
      ResetPasswordButton.Enabled = True
    End If
End Sub

Public Sub ResetPassword_OnClick(sender As Object, args As EventArgs)
  Dim newPassword As String
  u = Membership.GetUser(UsernameTextBox.Text, False)

  If u Is Nothing Then
    Msg.Text = "Username " & Server.HtmlEncode(UsernameTextBox.Text) & " not found. Please check the value and re-enter."
    Return
  End If

  Try
    newPassword = u.ResetPassword(AnswerTextBox.Text)
  Catch e As MembershipPasswordException
    Msg.Text = "Invalid password answer. Please re-enter and try again."
    Return
  Catch e As Exception
    Msg.Text = e.Message
    Return
  End Try

  If Not newPassword Is Nothing Then
    Msg.Text = "Password reset. Your new password is: " & Server.HtmlEncode(newPassword)
  Else
    Msg.Text = "Password reset failed. Please re-enter your values and try again."
  End If
End Sub


</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Reset Password</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Retrieve Password</h3>

  <asp:Label id="Msg" runat="server" ForeColor="maroon" /><br />

  Username: <asp:Textbox id="UsernameTextBox" Columns="30" runat="server" AutoPostBack="True" />
            <asp:RequiredFieldValidator id="UsernameRequiredValidator" runat="server"
                                        ControlToValidate="UsernameTextBox" ForeColor="red"
                                        Display="Static" ErrorMessage="Required" /><br />

  Password Question: <b><asp:Label id="QuestionLabel" runat="server" /></b><br />

  Answer: <asp:TextBox id="AnswerTextBox" Columns="60" runat="server" Enabled="False" />
          <asp:RequiredFieldValidator id="AnswerRequiredValidator" runat="server"
                                      ControlToValidate="AnswerTextBox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" Enabled="False" /><br />

  <asp:Button id="ResetPasswordButton" Text="Reset Password" 
              OnClick="ResetPassword_OnClick" runat="server" Enabled="False" />

</form>

</body>
</html>

備註

ResetPasswordMembershipProvider.ResetPassword會呼叫 屬性所ProviderName參考的成員資格提供者方法，將成員資格使用者的密碼重設為新的自動產生密碼。 然後，新的密碼會傳回給呼叫端。

如果 EnablePasswordReset 為 false，則成員資格提供者會傳回例外狀況。

如果 RequiresQuestionAndAnswer 為 false，您可以為 answer 參數提供 null ，或使用不接受任何參數的多ResetPassword載。

如果需要密碼答案，並提供不正確的密碼答案， MembershipPasswordException 成員資格提供者會擲回 。

另請參閱

適用於