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MembershipUser.ChangePassword(String, String) 方法

  • 參考

定義

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

更新成員資格資料存放區中成員資格使用者的密碼。

public:
 virtual bool ChangePassword(System::String ^ oldPassword, System::String ^ newPassword);
public virtual bool ChangePassword (string oldPassword, string newPassword);
abstract member ChangePassword : string * string -> bool
override this.ChangePassword : string * string -> bool
Public Overridable Function ChangePassword (oldPassword As String, newPassword As String) As Boolean

參數

oldPassword
String

成員資格使用者的目前密碼。

newPassword
String

成員資格使用者的新密碼。

傳回

Boolean

如果更新成功，則為 true；否則為 false。

例外狀況

ArgumentException

oldPassword 為空字串。

-或-

newPassword 為空字串。

ArgumentNullException

oldPassword 為 null。

-或-

newPassword 為 null。

PlatformNotSupportedException

這個方法無法使用。 如果應用程式以 .NET Framework 4 用戶端設定檔為目標，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

下列程式碼範例會修改目前登入使用者的密碼。

重要

此範例包含一個文字方塊，可接受使用者輸入，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 ChangePassword_OnClick(object sender, EventArgs args)
{
  // Update the password.

  MembershipUser u = Membership.GetUser(User.Identity.Name);

  try
  {
    if (u.ChangePassword(OldPasswordTextbox.Text, PasswordTextbox.Text))
    {
      Msg.Text = "Password changed.";
    }
    else
    {
      Msg.Text = "Password change failed. Please re-enter your values and try again.";
    }
  }
  catch (Exception e)
  {
    Msg.Text = "An exception occurred: " + Server.HtmlEncode(e.Message) + ". Please re-enter your values and try again.";
  }
}


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

<form id="form1" runat="server">
  <h3>Change Password for <%=User.Identity.Name%></h3>

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

  <table cellpadding="3" border="0">
    <tr>
      <td>Old Password:</td>
      <td><asp:Textbox id="OldPasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="OldPasswordRequiredValidator" runat="server"
                                      ControlToValidate="OldPasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Password:</td>
      <td><asp:Textbox id="PasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordRequiredValidator" runat="server"
                                      ControlToValidate="PasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Confirm Password:</td>
      <td><asp:Textbox id="PasswordConfirmTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordConfirmRequiredValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" />
          <asp:CompareValidator id="PasswordConfirmCompareValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ControlToCompare="PasswordTextBox"
                                      ErrorMessage="Confirm password must match password." />
      </td>
    </tr>
    <tr>
      <td></td>
      <td><asp:Button id="ChangePasswordButton" Text="Change Password" 
                      OnClick="ChangePassword_OnClick" runat="server" /></td>
    </tr>
  </table>
</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 ChangePassword_OnClick(sender As Object, args As EventArgs)
  ' Update the password.

  Dim u As MembershipUser = Membership.GetUser(User.Identity.Name)

  Try
    If u.ChangePassword(OldPasswordTextbox.Text, PasswordTextbox.Text) Then
      Msg.Text = "Password changed."
    Else
      Msg.Text = "Password change failed. Please re-enter your values and try again."
    End If
  Catch e As Exception
    Msg.Text = "An exception occurred: " & Server.HtmlEncode(e.Message) & ". Please re-enter your values and try again."
  End Try

End Sub


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

<form id="form1" runat="server">
  <h3>Change Password for <%=User.Identity.Name%></h3>

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

  <table cellpadding="3" border="0">
    <tr>
      <td>Old Password:</td>
      <td><asp:Textbox id="OldPasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="OldPasswordRequiredValidator" runat="server"
                                      ControlToValidate="OldPasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Password:</td>
      <td><asp:Textbox id="PasswordTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordRequiredValidator" runat="server"
                                      ControlToValidate="PasswordTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>
    <tr>
      <td>Confirm Password:</td>
      <td><asp:Textbox id="PasswordConfirmTextbox" runat="server" TextMode="Password" /></td>
      <td><asp:RequiredFieldValidator id="PasswordConfirmRequiredValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" />
          <asp:CompareValidator id="PasswordConfirmCompareValidator" runat="server"
                                      ControlToValidate="PasswordConfirmTextbox" ForeColor="red"
                                      Display="Static" ControlToCompare="PasswordTextBox"
                                      ErrorMessage="Confirm password must match password." />
      </td>
    </tr>
    <tr>
      <td></td>
      <td><asp:Button id="ChangePasswordButton" Text="Change Password" 
                      OnClick="ChangePassword_OnClick" runat="server" /></td>
    </tr>
  </table>
</form>

</body>
</html>

備註

ChangePasswordChangePassword呼叫 屬性所參考 ProviderName 之成員資格提供者的 方法，以更新成員資格資料存放區中成員資格使用者的密碼。

成員資格提供者可能會限制密碼的大小。 如需大小限制，請參閱成員資格提供者的檔。

適用於

另請參閱