Membership.GeneratePassword(Int32, Int32) Membership.GeneratePassword(Int32, Int32) Membership.GeneratePassword(Int32, Int32) Membership.GeneratePassword(Int32, Int32) Method

定義

名前空間:
System.Web.Security System.Web.Security System.Web.Security System.Web.Security
Assembly:
System.Web.dll

指定した長さのランダム パスワードを生成します。Generates a random password of the specified length.

public:
 static System::String ^ GeneratePassword(int length, int numberOfNonAlphanumericCharacters);
public static string GeneratePassword (int length, int numberOfNonAlphanumericCharacters);
static member GeneratePassword : int * int -> string
Public Shared Function GeneratePassword (length As Integer, numberOfNonAlphanumericCharacters As Integer) As String

パラメーター

length
Int32 Int32 Int32 Int32

生成されるパスワードの文字数。The number of characters in the generated password. 長さは 1 ～ 128 文字である必要があります。The length must be between 1 and 128 characters.

numberOfNonAlphanumericCharacters
Int32 Int32 Int32 Int32

生成されたパスワードに含まれている英数字以外の文字 (@、#、!、%、& など) の最小数。The minimum number of non-alphanumeric characters (such as @, #, !, %, &, and so on) in the generated password.

戻り値

String String String String

指定した長さのランダム パスワード。A random password of the specified length.

例外

ArgumentException ArgumentException ArgumentException ArgumentException

length が 1 未満か、128 よりも大きい値です。length is less than 1 or greater than 128 -or- numberOfNonAlphanumericCharacters が 0 未満であるか、または length を超えています。numberOfNonAlphanumericCharacters is less than 0 or greater than length.

例

次のコード例は、新しいメンバーシップ ユーザーを作成しを使用して、GeneratePasswordユーザーに表示される、ランダムな値に新しいユーザーのパスワードを初期化します。The following code example creates a new membership user and uses the GeneratePassword method to initialize the password for the new user to a random value, which is displayed to the user.

重要

この例には、潜在的なセキュリティ上の脅威がユーザー入力を受け付けるテキスト ボックスが含まれています。This example contains a text box that accepts user input, which is a potential security threat. 既定では、ASP.NET Web ページによって、ユーザー入力にスクリプトまたは HTML 要素が含まれていないかどうかが検証されます。By default, ASP.NET Web pages validate that user input does not include script or HTML elements. 詳細については、「スクリプトによる攻略の概要」を参照してください。For more information, see Script Exploits Overview. 

<%@ 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 CreateUser_OnClick(object sender, EventArgs args)
{
  // Generate a new 12-character password with at least 1 non-alphanumeric character.
  string password = Membership.GeneratePassword(12, 1);

  try
  {
    // Create new user.
    MembershipUser newUser = Membership.CreateUser(UsernameTextbox.Text, password, 
                                                   EmailTextbox.Text);

    Msg.Text = "User <b>" + Server.HtmlEncode(UsernameTextbox.Text) + "</b> created. " +
               "Your temporary password is " + password + ".";
  }
  catch (MembershipCreateUserException e)
  {
    Msg.Text = GetErrorMessage(e.StatusCode);
  }
  catch (HttpException e)
  {
    Msg.Text = e.Message;
  }
}

public string GetErrorMessage(MembershipCreateStatus status)
{
   switch (status)
   {
      case MembershipCreateStatus.DuplicateUserName:
        return "Username already exists. Please enter a different user name.";

      case MembershipCreateStatus.DuplicateEmail:
        return "A username for that email address already exists. Please enter a different email address.";

      case MembershipCreateStatus.InvalidPassword:
        return "The password provided is invalid. Please enter a valid password value.";

      case MembershipCreateStatus.InvalidEmail:
        return "The email address provided is invalid. Please check the value and try again.";

      case MembershipCreateStatus.InvalidAnswer:
        return "The password retrieval answer provided is invalid. Please check the value and try again.";

      case MembershipCreateStatus.InvalidQuestion:
        return "The password retrieval question provided is invalid. Please check the value and try again.";

      case MembershipCreateStatus.ProviderError:
        return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

      case MembershipCreateStatus.UserRejected:
        return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

      default:
        return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
   }
}

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Create User</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Create New User</h3>

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

  <table cellpadding="3" border="0">
    <tr>
      <td>Username:</td>
      <td><asp:Textbox id="UsernameTextbox" runat="server" /></td>
      <td><asp:RequiredFieldValidator id="UsernameRequiredValidator" runat="server"
                                      ControlToValidate="UserNameTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>

    <tr>
      <td>Email Address:</td>
      <td><asp:Textbox id="EmailTextbox" runat="server" /></td>
      <td><asp:RequiredFieldValidator id="EmailRequiredValidator" runat="server"
                                      ControlToValidate="EmailTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>

    <tr>
      <td></td>
      <td><asp:Button id="CreateUserButton" Text="Create User" OnClick="CreateUser_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 CreateUser_OnClick(sender As Object, args As EventArgs)
  ' Generate a new 12-character password with at least 1 non-alphanumeric character.
  Dim password As String = Membership.GeneratePassword(12, 1)

  Try
    ' Create new user.
    Dim newUser As MembershipUser = Membership.CreateUser(UsernameTextbox.Text, password, _
                                                          EmailTextbox.Text)

    Msg.Text = "User <b>" & Server.HtmlEncode(UsernameTextbox.Text) & "</b> created. " & _
               "Your temporary password is " & password & "."
  
  Catch e As MembershipCreateUserException
    Msg.Text = GetErrorMessage(e.StatusCode)
  Catch e As HttpException
    Msg.Text = e.Message
  End Try
End Sub

Public Function GetErrorMessage(status As MembershipCreateStatus) As String

   Select Case status
      Case MembershipCreateStatus.DuplicateUserName
        Return "Username already exists. Please enter a different user name."

      Case MembershipCreateStatus.DuplicateEmail
        Return "A username for that email address already exists. Please enter a different email address."

      Case MembershipCreateStatus.InvalidPassword
        Return "The password provided is invalid. Please enter a valid password value."

      Case MembershipCreateStatus.InvalidEmail
        Return "The email address provided is invalid. Please check the value and try again."

      Case MembershipCreateStatus.InvalidAnswer
        Return "The password retrieval answer provided is invalid. Please check the value and try again."

      Case MembershipCreateStatus.InvalidQuestion
        Return "The password retrieval question provided is invalid. Please check the value and try again."

      Case MembershipCreateStatus.ProviderError
        Return "The authentication provider Returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator."

      Case MembershipCreateStatus.UserRejected
        Return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator."

      Case Else
        Return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator."
   End Select
End Function

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Create User</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Create New User</h3>

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

  <table cellpadding="3" border="0">
    <tr>
      <td>Username:</td>
      <td><asp:Textbox id="UsernameTextbox" runat="server" /></td>
      <td><asp:RequiredFieldValidator id="UsernameRequiredValidator" runat="server"
                                      ControlToValidate="UserNameTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>

    <tr>
      <td>Email Address:</td>
      <td><asp:Textbox id="EmailTextbox" runat="server" /></td>
      <td><asp:RequiredFieldValidator id="EmailRequiredValidator" runat="server"
                                      ControlToValidate="EmailTextbox" ForeColor="red"
                                      Display="Static" ErrorMessage="Required" /></td>
    </tr>

    <tr>
      <td></td>
      <td><asp:Button id="CreateUserButton" Text="Create User" OnClick="CreateUser_OnClick" runat="server" /></td>
    </tr>
  </table>
</form>

</body>
</html>

注釈

GeneratePasswordメソッドは、ランダムなパスワードを生成するために使用しで最もよく使用されて、 ResetPassword 、新しい一時パスワードをユーザーのパスワードをリセットするメンバーシップ プロバイダーによって実装されるメソッド。The GeneratePassword method is used to generate a random password and is most commonly used by the ResetPassword method implemented by a membership provider to reset the password for a user to a new, temporary password.

生成されたパスワードには文字の英数字と次の区切り記号をのみが含まれています:!@#$%^&*()_-+=[{]};:<>|./?します。The generated password only contains alphanumeric characters and the following punctuation marks: !@#$%^&*()_-+=[{]};:<>|./?. 生成されたパスワードで非表示または印刷不可能な制御文字が含まれていません。No hidden or non-printable control characters are included in the generated password.

注意

によって作成されたランダムなパスワード、GeneratePasswordメソッドの正規表現は保証されません、PasswordStrengthRegularExpressionプロパティ。The random password created by the GeneratePassword method is not guaranteed to pass the regular expression in the PasswordStrengthRegularExpression property. ただし、ランダムなパスワードがによって確立された基準を満たして、MinRequiredPasswordLengthプロパティおよびnumberOfNonAlphanumericCharactersパラメーター。However, the random password will meet the criteria established by the MinRequiredPasswordLength property and the numberOfNonAlphanumericCharacters parameter.

適用対象

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