Problem : Get a list of user belonged to a role or to know if a user already has a role

What code can I write to know if a user belonged to a Role already ? and How can I get a list of a  user already in an existing role ? Please have a look at my code below :

Protected Sub AddUsers_OnClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddUsersToRole.Click

' I wanna add some code here to check if a user already belonged to a Role
' Please insert your code here. Thanks a lot.

' A role must be selected

If RolesListBox.SelectedItem Is Nothing Then
Msg.Text = "Please select a role."
Exit Sub
End If

' At least one user must be selected

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

' Create list of users to be added to the selected role

Dim sizeOfArray As Integer = UsersListBox.GetSelectedIndices.Length
Dim newUsers(sizeOfArray - 1) As String

'For i As Integer = 0 To newusers.Length - 1

' newusers(i) = _

' UsersListBox.Items( _

' UsersListBox.GetSelectedIndices( )(i)).Value


For i As Integer = 0 To newUsers.Length - 1

' get the array of selected indices from the (multiselect) list box
Dim selectedIndices As Integer() = UsersListBox.GetSelectedIndices()

' get the selectedIndex that corresponds to the counter (i)
Dim selectedIndex As Integer = selectedIndices(i)

' get the ListItem in the UserListBox Items collection at that offset
Dim myListItem As ListItem = UsersListBox.Items(selectedIndex)

' get the string that is that ListItem's value property
Dim newUser As String = myListItem.Value

' add that string to the newUsers collection of string
newUsers(i) = newUser

' Add users to the selected role

Roles.AddUsersToRole(newUsers, RolesListBox.SelectedItem.Value)

usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)

UsersInRoleGrid.DataSource = usersInRole

End Sub

it worked as it was supposed to. But how can I check if user is already belonged to a Role ?

Thanks a lot !
3/21/2007 9:54:53 AM 27051 articles. 1 followers. Follow

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The RoleModelProvider has two functions for this:


        // Summary:
        //     Gets a value indicating whether the currently logged-on user is in the specified
        //     role.
        // Parameters:
        //   roleName:
        //     The name of the role to search in.
        // Returns:
        //     true if the currently logged-on user is in the specified role; otherwise,
        //     false.
        // Exceptions:
        //   System.Configuration.Provider.ProviderException:
        //     Role management is not enabled.
        //   System.ArgumentNullException:
        //     roleName is null.-or-There is no current logged-on user.
        //   System.ArgumentException:
        //     roleName is an empty string or contains a comma (,).
        Roles.IsUserInRole(string roleName);
        // Summary:
        //     Gets a value indicating whether the specified user is in the specified role.
        // Parameters:
        //   username:
        //     The name of the user to search for.
        //   roleName:
        //     The name of the role to search in.
        // Returns:
        //     true if the specified user is in the specified role; otherwise, false.
        // Exceptions:
        //   System.ArgumentNullException:
        //     roleName is null.-or-username is null.
        //   System.Configuration.Provider.ProviderException:
        //     Role management is not enabled.
        //   System.ArgumentException:
        //     roleName is an empty string or contains a comma (,).-or-username contains
        //     a comma (,).
        Roles.IsUserInRole(userName, roleName)
Matthias :)
3/21/2007 2:15:22 PM has following two methods: 

RoleProvider.GetUsersInRole Method

RoleProvider.IsUserInRole Method

Zhao Ji Ma
Microsoft Online Community Support

“Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”
3/26/2007 9:24:46 AM

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