Roles.AddUsersToRoles Method (System.Web.Security)

AddUsersToRoles Method

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Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

Roles..::.AddUsersToRoles Method

Updated: November 2007

Adds the specified users to the specified roles.

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

Syntax

Visual Basic (Declaration)

Public Shared Sub AddUsersToRoles ( _
    usernames As String(), _
    roleNames As String() _
)

Visual Basic (Usage)

Dim usernames As String()
Dim roleNames As String()

Roles.AddUsersToRoles(usernames, _
    roleNames)

public static void AddUsersToRoles(
    string[] usernames,
    string[] roleNames
)

Visual C++

public:
static void AddUsersToRoles(
    array<String^>^ usernames, 
    array<String^>^ roleNames
)

public static void AddUsersToRoles(
    String[] usernames,
    String[] roleNames
)

JScript

public static function AddUsersToRoles(
    usernames : String[], 
    roleNames : String[]
)

Parameters

usernames: Type: array<System..::.String>[]()[]
A string array of user names to add to the specified roles.

roleNames: Type: array<System..::.String>[]()[]
A string array of role names to add the specified user names to.

Exceptions

Exception	Condition
System..::.ArgumentNullException	One of the roles in roleNames is nullNothingnullptra null reference (Nothing in Visual Basic). -or- One of the users in usernames is nullNothingnullptra null reference (Nothing in Visual Basic).
System..::.ArgumentException	One of the roles in roleNames is an empty string or contains a comma (,). -or- One of the users in usernames is an empty string or contains a comma (,). -or- roleNames contains a duplicate element. -or- usernames contains a duplicate element.
System.Configuration.Provider..::.ProviderException	Role management is not enabled.

Exception

Condition

System..::.ArgumentNullException

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

-or-

One of the users in usernames is nullNothingnullptra null reference (Nothing in Visual Basic).

System..::.ArgumentException

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

-or-

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

-or-

roleNames contains a duplicate element.

-or-

usernames contains a duplicate element.

System.Configuration.Provider..::.ProviderException

Role management is not enabled.

Remarks

The AddUsersToRoles method calls the default role provider to associate the specified users 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 AddUsersToRoles 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.

Note:
User names and role names cannot contain commas.

Examples

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

Visual Basic

<%@ 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 AddUsers_OnClick(sender As Object, args As EventArgs)

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

  Dim user_indices() As Integer = UsersListBox.GetSelectedIndices()

  If user_indices.Length = 0 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 users to be added to the selected roles.

  Dim newusers(user_indices.Length - 1) As String

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


  ' 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.AddUsersToRoles(newusers, rolesList)  
    Msg.Text = "User(s) added to Role(s)."
  Catch e As HttpException
    Msg.Text = e.Message
  End Try
End Sub

</script>
<html  >
<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" SelectionMode="Multiple" runat="server" /></td>
      <td valign="top"><asp:Button Text="Add User(s) to Role(s)" id="AddUsersButton"
                                 runat="server" OnClick="AddUsers_OnClick" /></td>
    </tr>
  </table>
</form>

</body>
</html>

<%@ 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;

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();
  }
}


public void AddUsers_OnClick(object sender, EventArgs args)
{
  // Verify that at least one user and one role are selected.

  int[] user_indices = UsersListBox.GetSelectedIndices();

  if (user_indices.Length == 0)
  {
    Msg.Text = "Please select one or more users.";
    return;
  }

  int[] role_indices = RolesListBox.GetSelectedIndices();

  if (role_indices.Length == 0)
  {
    Msg.Text = "Please select one or more roles.";
    return;
  }


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

  string[] newusers = new string[user_indices.Length];

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


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

  string[] rolesList = new string[role_indices.Length];

  for (int i = 0; i < rolesList.Length; i++)
  {
    rolesList[i] = RolesListBox.Items[role_indices[i]].Value;
  }


  // Add the users to the selected role.

  try
  {
    Roles.AddUsersToRoles(newusers, rolesList);  
    Msg.Text = "User(s) added to Role(s).";
  }
  catch (HttpException e)
  {
    Msg.Text = e.Message;
  } 
}

</script>
<html  >
<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" SelectionMode="Multiple" runat="server" /></td>
      <td valign="top"><asp:Button Text="Add User(s) to Role(s)" id="AddUsersButton"
                                 runat="server" OnClick="AddUsers_OnClick" /></td>
    </tr>
  </table>
</form>

</body>
</html>

Platforms

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

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information