Roles.GetRolesForUser Method

Reference

Definition

Namespace:: System.Web.Security

Assembly:: System.Web.dll

Important

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Gets a list of the roles that a user is in.

Overloads

GetRolesForUser()	Gets a list of the roles that the currently logged-on user is in.
GetRolesForUser(String)	Gets a list of the roles that a user is in.

GetRolesForUser()

Gets a list of the roles that the currently logged-on user is in.

public:
 static cli::array <System::String ^> ^ GetRolesForUser();

public static string[] GetRolesForUser();

static member GetRolesForUser : unit -> string[]

Public Shared Function GetRolesForUser () As String()

Returns

String[]

A string array containing the names of all the roles that the currently logged-on user is in.

Exceptions

ArgumentNullException

There is no current logged-on user.

ProviderException

Role management is not enabled.

Examples

The following code example uses the GetRolesForUser method to retrieve a list of roles for a specified user and bind the returned roles to a System.Web.UI.WebControls.GridView control. For an example of a Web.config file that enables role management, see Roles.

<%@ 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">

string[] rolesArray;

public void Page_Load()
{
  if (!IsPostBack)
  {
    // Bind roles to GridView.

    try
    {
      rolesArray = Roles.GetRolesForUser();
    }
    catch (HttpException e)
    {
      Msg.Text = "There is no current logged on user. Role information cannot be retrieved.";
      return;
    }

    UserRolesGrid.Columns[0].HeaderText = "Roles for " + User.Identity.Name;
    UserRolesGrid.DataSource = rolesArray;
    UserRolesGrid.DataBind();
  }
}

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: View User Roles</title>
</head>
<body>

<form runat="server" id="PageForm">

  <h3>View User Roles</h3>

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

  <table border="0" cellspacing="4">
    <tr>
      <td valign="top"><asp:GridView runat="server" CellPadding="4" id="UserRolesGrid" 
                                     AutoGenerateColumns="false" Gridlines="None" 
                                     CellSpacing="0" >
                         <HeaderStyle BackColor="navy" ForeColor="white" />
                         <Columns>
                           <asp:TemplateField HeaderText="Roles" >
                             <ItemTemplate>
                               <%# Container.DataItem.ToString() %>
                             </ItemTemplate>
                           </asp:TemplateField>
                         </Columns>
                       </asp:GridView></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">

Dim rolesArray() As String

Public Sub Page_Load()
  If Not IsPostBack Then
    ' Bind roles to GridView.

    Try
      rolesArray = Roles.GetRolesForUser()
    Catch e As HttpException
      Msg.Text = "There is no current logged on user. Role information cannot be retrieved."
      Return
    End Try

    UserRolesGrid.Columns(0).HeaderText = "Roles for " & User.Identity.Name
    UserRolesGrid.DataSource = rolesArray
    UserRolesGrid.DataBind()
  End If
End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: View User Roles</title>
</head>
<body>

<form runat="server" id="PageForm">

  <h3>View User Roles</h3>

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

  <table border="0" cellspacing="4">
    <tr>
      <td valign="top"><asp:GridView runat="server" CellPadding="4" id="UserRolesGrid" 
                                     AutoGenerateColumns="false" Gridlines="None" 
                                     CellSpacing="0" >
                         <HeaderStyle BackColor="navy" ForeColor="white" />
                         <Columns>
                           <asp:TemplateField HeaderText="Roles" >
                             <ItemTemplate>
                               <%# Container.DataItem.ToString() %>
                             </ItemTemplate>
                           </asp:TemplateField>
                         </Columns>
                       </asp:GridView></td>
    </tr>
  </table>

</form>

</body>
</html>

Remarks

The GetRolesForUser method calls the RoleProvider.GetRolesForUser method of the default role provider to retrieve from the data source the roles that the currently logged-on user is in. The currently logged-on user is identified by the HttpContext.User property of the current System.Web.HttpContext, or by Thread.CurrentPrincipal for non-HTTP hosting environments. If no user is logged on, an exception will be thrown. Only the roles for the application that is specified in the ApplicationName property are retrieved.

If CacheRolesInCookie is true, then the results of the GetRolesForUser method may be returned from the role cache rather than the specified role provider.

Applies to

.NET Framework 4.8.1 and other versions

Product	Versions
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

GetRolesForUser(String)

Gets a list of the roles that a user is in.

public:
 static cli::array <System::String ^> ^ GetRolesForUser(System::String ^ username);

public static string[] GetRolesForUser(string username);

static member GetRolesForUser : string -> string[]

Public Shared Function GetRolesForUser (username As String) As String()

Parameters

username: String

The user to return a list of roles for.

Returns

String[]

A string array containing the names of all the roles that the specified user is in.

Exceptions

ArgumentNullException

username is null.

ArgumentException

username contains a comma (,).

ProviderException

Role management is not enabled.

Examples

<%@ 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">

string[] rolesArray;

public void Page_Load()
{
  if (!IsPostBack)
  {
    // Bind roles to GridView.

    try
    {
      rolesArray = Roles.GetRolesForUser();
    }
    catch (HttpException e)
    {
      Msg.Text = "There is no current logged on user. Role information cannot be retrieved.";
      return;
    }

    UserRolesGrid.Columns[0].HeaderText = "Roles for " + User.Identity.Name;
    UserRolesGrid.DataSource = rolesArray;
    UserRolesGrid.DataBind();
  }
}

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: View User Roles</title>
</head>
<body>

<form runat="server" id="PageForm">

  <h3>View User Roles</h3>

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

  <table border="0" cellspacing="4">
    <tr>
      <td valign="top"><asp:GridView runat="server" CellPadding="4" id="UserRolesGrid" 
                                     AutoGenerateColumns="false" Gridlines="None" 
                                     CellSpacing="0" >
                         <HeaderStyle BackColor="navy" ForeColor="white" />
                         <Columns>
                           <asp:TemplateField HeaderText="Roles" >
                             <ItemTemplate>
                               <%# Container.DataItem.ToString() %>
                             </ItemTemplate>
                           </asp:TemplateField>
                         </Columns>
                       </asp:GridView></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">

Dim rolesArray() As String

Public Sub Page_Load()
  If Not IsPostBack Then
    ' Bind roles to GridView.

    Try
      rolesArray = Roles.GetRolesForUser()
    Catch e As HttpException
      Msg.Text = "There is no current logged on user. Role information cannot be retrieved."
      Return
    End Try

    UserRolesGrid.Columns(0).HeaderText = "Roles for " & User.Identity.Name
    UserRolesGrid.DataSource = rolesArray
    UserRolesGrid.DataBind()
  End If
End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: View User Roles</title>
</head>
<body>

<form runat="server" id="PageForm">

  <h3>View User Roles</h3>

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

  <table border="0" cellspacing="4">
    <tr>
      <td valign="top"><asp:GridView runat="server" CellPadding="4" id="UserRolesGrid" 
                                     AutoGenerateColumns="false" Gridlines="None" 
                                     CellSpacing="0" >
                         <HeaderStyle BackColor="navy" ForeColor="white" />
                         <Columns>
                           <asp:TemplateField HeaderText="Roles" >
                             <ItemTemplate>
                               <%# Container.DataItem.ToString() %>
                             </ItemTemplate>
                           </asp:TemplateField>
                         </Columns>
                       </asp:GridView></td>
    </tr>
  </table>

</form>

</body>
</html>

Remarks

The GetRolesForUser method calls the RoleProvider.GetRolesForUser method of the default role provider to retrieve from the data source the roles that the user is in. Only the roles for the application that is specified in the ApplicationName property are retrieved.

If username is equal to the current logged-on user and CacheRolesInCookie is true, the results of the GetRolesForUser method may be returned from the role cache rather than the specified Provider.

Applies to

.NET Framework 4.8.1 and other versions

Product	Versions
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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Roles.GetRolesForUser Method

Definition

Overloads

GetRolesForUser()

Returns

Exceptions

Examples

Remarks

See also

Applies to

GetRolesForUser(String)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to