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Roles.AddUsersToRole(String[], String) Metodo

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.Security
Assembly:
System.Web.dll

Aggiunge utenti specifici al ruolo specificato.

public:
 static void AddUsersToRole(cli::array <System::String ^> ^ usernames, System::String ^ roleName);
public static void AddUsersToRole (string[] usernames, string roleName);
static member AddUsersToRole : string[] * string -> unit
Public Shared Sub AddUsersToRole (usernames As String(), roleName As String)

Parametri

usernames
String[]

Matrice di stringhe di nomi utente da aggiungere al ruolo specificato.

roleName
String

Ruolo a cui aggiungere i nomi utente specificati.

Eccezioni

ArgumentNullException

roleName è null.

-oppure-

Uno degli elementi in usernames è null.

ArgumentException

roleName è una stringa vuota o contiene una virgola (,).

-oppure-

Uno degli elementi in usernames è una stringa vuota o contiene una virgola (,).

-oppure-

usernames contiene un elemento duplicato.

ProviderException

La gestione ruoli non è attivata.

Esempio

L'esempio di codice seguente aggiunge uno o più utenti a un ruolo o rimuove un utente da un ruolo in base all'input utente. Per un esempio di file di Web.config che abilita la gestione dei ruoli, vedere Roles.


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

<%@ Import Namespace="System.Web.Security" %>
<%@ Import Namespace="System.Web.UI" %>

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

  string[] rolesArray;
  MembershipUserCollection users;
  string[] usersInRole;

  public void Page_Load()
  {
    Msg.Text = "";

    if (!IsPostBack)
    {
      // Bind roles to ListBox.

      rolesArray = Roles.GetAllRoles();
      RolesListBox.DataSource = rolesArray;
      RolesListBox.DataBind();

      // Bind users to ListBox.

      users = Membership.GetAllUsers();
      UsersListBox.DataSource = users;
      UsersListBox.DataBind();
    }

    if (RolesListBox.SelectedItem != null)
    {
      // Show users in role. Bind user list to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
      UsersInRoleGrid.DataSource = usersInRole;
      UsersInRoleGrid.DataBind();
    }
  }


  public void AddUsers_OnClick(object sender, EventArgs args)
  {
    // Verify that a role is selected.

    if (RolesListBox.SelectedItem == null)
    {
      Msg.Text = "Please select a role.";
      return;
    }


    // Verify that at least one user is selected.

    if (UsersListBox.SelectedItem == null)
    {
      Msg.Text = "Please select one or more users.";
      return;
    }


    // Create list of users to be added to the selected role.

    string[] newusers = new string[UsersListBox.GetSelectedIndices().Length];

    for (int i = 0; i < newusers.Length; i++)
    {
      newusers[i] = UsersListBox.Items[UsersListBox.GetSelectedIndices()[i]].Value;
    }


    // Add the users to the selected role.

    try
    {
      Roles.AddUsersToRole(newusers, RolesListBox.SelectedItem.Value);

      // Re-bind users in role to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
      UsersInRoleGrid.DataSource = usersInRole;
      UsersInRoleGrid.DataBind();
    }
    catch (Exception e)
    {
      Msg.Text = e.Message;
    }
  }


  public void UsersInRoleGrid_RemoveFromRole(object sender, GridViewCommandEventArgs args)
  {
    // Get the selected user name to remove.

    int index = Convert.ToInt32(args.CommandArgument);

    string username = ((DataBoundLiteralControl)UsersInRoleGrid.Rows[index].Cells[0].Controls[0]).Text;


    // Remove the user from the selected role.

    try
    {
      Roles.RemoveUserFromRole(username, RolesListBox.SelectedItem.Value);
    }
    catch (Exception e)
    {
      Msg.Text = "An exception of type " + e.GetType().ToString() +
                 " was encountered removing the user from the role.";
    }


    // Re-bind users in role to GridView.

    usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
    UsersInRoleGrid.DataSource = usersInRole;
    UsersInRoleGrid.DataBind();
  }



</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
  <title>Sample: Role Membership</title>
</head>
<body>
  <form runat="server" id="PageForm">
    <h3>
      Role Membership</h3>
    <asp:Label ID="Msg" ForeColor="maroon" runat="server" /><br />
    <table cellpadding="3" border="0">
      <tr>
        <td valign="top">
          Roles:</td>
        <td valign="top">
          <asp:ListBox ID="RolesListBox" runat="server" Rows="8" AutoPostBack="true" /></td>
        <td valign="top">
          Users:</td>
        <td valign="top">
          <asp:ListBox ID="UsersListBox" DataTextField="Username" Rows="8" SelectionMode="Multiple"
            runat="server" /></td>
        <td valign="top">
          <asp:Button Text="Add User(s) to Role" ID="AddUsersButton" runat="server" OnClick="AddUsers_OnClick" /></td>
      </tr>
      <tr>
        <td valign="top">
          Users In Role:</td>
        <td valign="top">
          <asp:GridView runat="server" CellPadding="4" ID="UsersInRoleGrid" AutoGenerateColumns="false"
            GridLines="None" CellSpacing="0" OnRowCommand="UsersInRoleGrid_RemoveFromRole">
            <HeaderStyle BackColor="navy" ForeColor="white" />
            <Columns>
              <asp:TemplateField HeaderText="User Name" >
                <ItemTemplate>
                  <%# Container.DataItem.ToString() %>
                </ItemTemplate>
              </asp:TemplateField>
              <asp:ButtonField Text="Remove From Role" ButtonType="Link" />
            </Columns>
          </asp:GridView>
        </td>
      </tr>
    </table>
  </form>
</body>
</html>


<%@ Page Language="VB" %>

<%@ Import Namespace="System.Web.Security" %>
<%@ Import Namespace="System.Web.UI" %>

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

  Dim rolesArray() As String
  Dim users As MembershipUserCollection
  Dim usersInRole() As String

  Public Sub Page_Load()

    Msg.Text = ""

    If Not IsPostBack Then
      ' Bind roles to ListBox.

      rolesArray = Roles.GetAllRoles()
      RolesListBox.DataSource = rolesArray
      RolesListBox.DataBind()

      ' Bind users to ListBox.

      users = Membership.GetAllUsers()
      UsersListBox.DataSource = users
      UsersListBox.DataBind()
    End If

    If Not RolesListBox.SelectedItem Is Nothing Then
      ' Show users in role. Bind user list to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
      UsersInRoleGrid.DataSource = usersInRole
      UsersInRoleGrid.DataBind()
    End If

  End Sub


  Public Sub AddUsers_OnClick(ByVal sender As Object, ByVal args As EventArgs)

    ' Verify that a role is selected.

    If RolesListBox.SelectedItem Is Nothing Then
      Msg.Text = "Please select a role."
      Return
    End If


    ' Verify that at least one user is selected.

    If UsersListBox.SelectedItem Is Nothing Then
      Msg.Text = "Please select one or more users."
      Return
    End If


    ' Create list of users to be added to the selected role.

    Dim newusers(UsersListBox.GetSelectedIndices().Length - 1) As String

    For i As Integer = 0 To newusers.Length - 1
      newusers(i) = UsersListBox.Items(UsersListBox.GetSelectedIndices(i)).Value
    Next


    ' Add the users to the selected role.

    Try
      Roles.AddUsersToRole(newusers, RolesListBox.SelectedItem.Value)

      ' Re-bind users in role to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
      UsersInRoleGrid.DataSource = usersInRole
      UsersInRoleGrid.DataBind()
    Catch e As Exception
      Msg.Text = e.Message
    End Try

  End Sub


  Public Sub UsersInRoleGrid_RemoveFromRole(ByVal sender As Object, ByVal args As GridViewCommandEventArgs)

    ' Get the selected user name to remove.

    Dim index As Integer = Convert.ToInt32(args.CommandArgument)

    Dim username As String = (CType(UsersInRoleGrid.Rows(index).Cells(0).Controls(0), DataBoundLiteralControl)).Text


    ' Remove the user from the selected role.

    Try
      Roles.RemoveUserFromRole(username, RolesListBox.SelectedItem.Value)
    Catch e As Exception
      Msg.Text = "An exception of type " & e.GetType().ToString() & _
                 " was encountered removing the user from the role."
    End Try

    ' Re-bind users in role to GridView.

    usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
    UsersInRoleGrid.DataSource = usersInRole
    UsersInRoleGrid.DataBind()

  End Sub



</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
  <title>Sample: Role Membership</title>
</head>
<body>
  <form runat="server" id="PageForm">
    <h3>
      Role Membership</h3>
    <asp:Label ID="Msg" ForeColor="maroon" runat="server" /><br />
    <table cellpadding="3" border="0">
      <tr>
        <td valign="top">
          Roles:</td>
        <td valign="top">
          <asp:ListBox ID="RolesListBox" runat="server" Rows="8" AutoPostBack="true" /></td>
        <td valign="top">
          Users:</td>
        <td valign="top">
          <asp:ListBox ID="UsersListBox" DataTextField="Username" Rows="8" SelectionMode="Multiple"
            runat="server" /></td>
        <td valign="top">
          <asp:Button Text="Add User(s) to Role" ID="AddUsersButton" runat="server" OnClick="AddUsers_OnClick" /></td>
      </tr>
      <tr>
        <td valign="top">
          Users In Role:</td>
        <td valign="top">
          <asp:GridView runat="server" CellPadding="4" ID="UsersInRoleGrid" AutoGenerateColumns="false"
            GridLines="None" CellSpacing="0" OnRowCommand="UsersInRoleGrid_RemoveFromRole">
            <HeaderStyle BackColor="navy" ForeColor="white" />
            <Columns>
              <asp:TemplateField HeaderText="User Name" >
                <ItemTemplate>
                  <%# Container.DataItem.ToString() %>
                </ItemTemplate>
              </asp:TemplateField>
              <asp:ButtonField Text="Remove From Role" ButtonType="Link" />
            </Columns>
          </asp:GridView>
        </td>
      </tr>
    </table>
  </form>
</body>
</html>

Commenti

Il AddUsersToRole metodo chiama il provider di ruoli predefinito per associare gli utenti specificati al ruolo specificato nell'origine dati.

Se l'applicazione usa la SqlRoleProvider classe, gli aggiornamenti del database eseguiti durante la chiamata al AddUsersToRoles metodo vengono eseguiti all'interno di una transazione. Se viene rilevato un errore, ad esempio un nome utente già presente in un ruolo specificato, la transazione viene eseguito il rollback e non vengono eseguiti aggiornamenti.

Nota

I nomi utente e i nomi dei ruoli non possono contenere virgole.

Si applica a

Vedi anche