Export (0) Print
Expand All

Roles.AddUserToRole Method

Adds the specified user to the specified role.

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

public static void AddUserToRole(
	string username,
	string roleName


Type: System.String
The user name to add to the specified role.
Type: System.String
The role to add the specified user name to.


roleName is null.


username is null.


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


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


Role management is not enabled.


User is already assigned to the specified role.

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


User names and role names cannot contain commas.

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

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<%@ Import Namespace="System.Web.UI" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<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;

    // Bind users to ListBox.

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

public void AddUser_OnClick(object sender, EventArgs args)
  // Verify that a user and a role are selected.

  if (UsersListBox.SelectedItem == null)
    Msg.Text = "Please select a user.";

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

  // Add the user to the selected role.

    Roles.AddUserToRole(UsersListBox.SelectedItem.Value, RolesListBox.SelectedItem.Value);  
    Msg.Text = "User added to Role.";
  catch (HttpException e)
    Msg.Text = e.Message;

<html xmlns="http://www.w3.org/1999/xhtml" >
<title>Sample: Role Membership</title>

<form runat="server" id="PageForm">
  <h3>Role Membership</h3>
  <asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />
  <table cellpadding="3" border="0">
      <td valign="top">Roles:</td>
      <td valign="top"><asp:ListBox id="RolesListBox" runat="server" 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" id="AddUserButton"
                                 runat="server" OnClick="AddUser_OnClick" /></td>


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Community Additions

© 2015 Microsoft