AuthorizationStoreRoleProvider.GetRolesForUser(String) Method
Definition
Important
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Gets a list of the roles that a user is in.
public:
override cli::array <System::String ^> ^ GetRolesForUser(System::String ^ username);public override string[] GetRolesForUser (string username);override this.GetRolesForUser : string -> string[]Public Overrides Function GetRolesForUser (username As String) As String()Parameters
- username
- String
The user to return a list of roles for.
Returns
A string array containing the names of all the roles that the specified user is in.
Exceptions
username is null.
username contains a comma.
The configured applicationName was not found.
-or-
The configured scopeName was not found.
-or-
The authorization-manager runtime is not installed on the server.
The connectionStringName attribute references a connection string to a file that does not exist.
The AuthorizationStoreRoleProvider instance is configured with a file-based policy store, and read access to the file is not allowed at the current trust level.
Examples
The following code example uses the GetRolesForUser method to retrieve a list of roles for a specified user and binds them to a System.Web.UI.WebControls.GridView control. For an example of a Web.config file that enables role management, see AuthorizationStoreRoleProvider.
<%@ 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;
MembershipUserCollection users;
public void Page_Load()
{
Msg.Text = "";
try
{
if (!Roles.IsUserInRole(User.Identity.Name, "Administrators"))
{
Msg.Text = "You are not authorized to view user roles.";
UsersListBox.Visible = false;
return;
}
}
catch (HttpException e)
{
Msg.Text = "There is no current logged on user. Role membership cannot be verified.";
return;
}
if (!IsPostBack)
{
// Bind users to ListBox.
users = Membership.GetAllUsers();
UsersListBox.DataSource = users;
UsersListBox.DataBind();
}
// If a user is selected, show the roles for the selected user.
if (UsersListBox.SelectedItem != null)
{
// Bind roles to GridView.
rolesArray = Roles.GetRolesForUser(UsersListBox.SelectedItem.Value);
UserRolesGrid.DataSource = rolesArray;
UserRolesGrid.DataBind();
UserRolesGrid.Columns[0].HeaderText = "Roles for " + UsersListBox.SelectedItem.Value;
}
}
</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:ListBox id="UsersListBox" DataTextField="Username"
Rows="8" AutoPostBack="true" runat="server" /></td>
<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
Dim users As MembershipUserCollection
Public Sub Page_Load()
Msg.Text = ""
Try
If Not Roles.IsUserInRole(User.Identity.Name, "Administrators") Then
Msg.Text = "You are not authorized to view user roles."
UsersListBox.Visible = False
Return
End If
Catch e As HttpException
Msg.Text = "There is no current logged on user. Role membership cannot be verified."
Return
End Try
If Not IsPostBack Then
' Bind users to ListBox.
users = Membership.GetAllUsers()
UsersListBox.DataSource = users
UsersListBox.DataBind()
End If
' If a user is selected, show the roles for the selected user.
If Not UsersListBox.SelectedItem Is Nothing Then
' Bind roles to GridView.
rolesArray = Roles.GetRolesForUser(UsersListBox.SelectedItem.Value)
UserRolesGrid.DataSource = rolesArray
UserRolesGrid.DataBind()
UserRolesGrid.Columns(0).HeaderText = "Roles for " & UsersListBox.SelectedItem.Value
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:ListBox id="UsersListBox" DataTextField="Username"
Rows="8" AutoPostBack="true" runat="server" /></td>
<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 is called by the Roles class to retrieve a list of a specified user's roles from the authorization-manager policy store specified in the ASP.NET application's configuration file (Web.config).
