Roles.AddUserToRoles Method

Adds the specified user to the specified roles.

Namespace: System.Web.Security
Assembly: System.Web (in system.web.dll)

'Declaration
Public Shared Sub AddUserToRoles ( _
	username As String, _
	roleNames As String() _
)
'Usage
Dim username As String
Dim roleNames As String()

Roles.AddUserToRoles(username, roleNames)
public static void AddUserToRoles (
	String username, 
	String[] roleNames
)
public static function AddUserToRoles (
	username : String, 
	roleNames : String[]
)
Not applicable.

Parameters

username

The user name to add to the specified roles.

roleNames

A string array of roles to add the specified user name to.

Exception typeCondition

System.ArgumentNullException

One of the roles in roleNames is a null reference (Nothing in Visual Basic).

-or-

username is a null reference (Nothing in Visual Basic).

System.ArgumentException

One of the roles in roleNames is an empty string or contains a comma (,).

-or-

username is an empty string or contains a comma (,).

-or-

roleNames contains a duplicate element.

System.Configuration.Provider.ProviderException

Role management is not enabled.

The AddUserToRoles method calls the default role provider to associate the specified user with the specified roles at the data source.

If your application uses the SqlRoleProvider class, the database updates that are performed during the call to the AddUserToRoles method are made within a transaction. If an error is encountered, such as a user name that is already in a specified role, the transaction is rolled back and no updates are performed.

NoteNote:

User names and role names cannot contain commas.

The following code example adds a user to one or more roles. For an example of a Web.config file that enables role management, see Roles.

<%@ 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

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
End Sub


Public Sub AddUser_OnClick(sender As Object, args As EventArgs)

  ' Verify that a user and at least one role are selected.

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

  Dim role_indices() As Integer = RolesListBox.GetSelectedIndices()

  If role_indices.Length = 0 Then
    Msg.Text = "Please select one or more roles."
    Return
  End If


  ' Create list of roles to be add the selected users to.

  Dim rolesList(role_indices.Length - 1) As String

  For i As Integer = 0 To rolesList.Length - 1
    rolesList(i) = RolesListBox.Items(role_indices(i)).Value
  Next


  ' Add the users to the selected role.

  Try
    Roles.AddUserToRoles(UsersListBox.SelectedItem.Value, rolesList)
    Msg.Text = "User added to Role(s)."
  Catch e As HttpException
    Msg.Text = e.Message
  End Try
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" SelectionMode="Multiple"
                                    Rows="8" /></td>
      <td valign="top">Users:</td>
      <td valign="top"><asp:ListBox id="UsersListBox" DataTextField="Username" 
                                  Rows="8" runat="server" /></td>
      <td valign="top"><asp:Button Text="Add User to Role(s)" id="AddUserButton"
                                 runat="server" OnClick="AddUser_OnClick" /></td>
    </tr>
  </table>
</form>

</body>
</html>

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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