Roles.RemoveUsersFromRole(String[], String) Method
Definition
Important
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Removes the specified users from the specified role.
public:
static void RemoveUsersFromRole(cli::array <System::String ^> ^ usernames, System::String ^ roleName);
public static void RemoveUsersFromRole (string[] usernames, string roleName);
static member RemoveUsersFromRole : string[] * string -> unit
Public Shared Sub RemoveUsersFromRole (usernames As String(), roleName As String)
Parameters
- usernames
- String[]
A string array of user names to remove from the specified roles.
- roleName
- String
The name of the role to remove the specified users from.
Exceptions
roleName
is an empty string or contains a comma (,).
-or-
One of the user names in usernames
is an empty string or contains a comma (,).
-or-
usernames
contains a duplicate element.
Role management is not enabled.
Examples
The following code example uses the RemoveUsersFromRole method to remove one or more users from 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"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
string[] rolesArray;
string[] users;
public void Page_Load()
{
Msg.Text = "";
if (!IsPostBack)
{
// Bind roles to ListBox.
rolesArray = Roles.GetAllRoles();
RolesListBox.DataSource = rolesArray;
RolesListBox.DataBind();
}
}
public void RolesListBox_OnSelectedIndexChanged(object sender, EventArgs args)
{
// Bind users to ListBox.
users = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
UsersListBox.DataSource = users;
UsersListBox.DataBind();
}
public void RemoveUsers_OnClick(object sender, EventArgs args)
{
// Verify that at least one user and a role are selected.
int[] user_indices = UsersListBox.GetSelectedIndices();
if (user_indices.Length == 0)
{
Msg.Text = "Please select one or more users.";
return;
}
if (RolesListBox.SelectedItem == null)
{
Msg.Text = "Please select a role.";
return;
}
// Create list of users to be removed from the selected role.
string[] usersList = new string[user_indices.Length];
for (int i = 0; i < usersList.Length; i++)
{
usersList[i] = UsersListBox.Items[user_indices[i]].Value;
}
// Remove the users from the selected role.
try
{
Roles.RemoveUsersFromRole(usersList, RolesListBox.SelectedItem.Value);
Msg.Text = "User(s) removed from Role.";
// Rebind users to ListBox.
users = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
UsersListBox.DataSource = users;
UsersListBox.DataBind();
}
catch (HttpException e)
{
Msg.Text = e.Message;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<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" AutoPostBack="true"
OnSelectedIndexChanged="RolesListBox_OnSelectedIndexChanged"
runat="server" Rows="8" /></td>
<td valign="top">Users:</td>
<td valign="top"><asp:ListBox id="UsersListBox" Rows="8"
SelectionMode="Multiple" runat="server" /></td>
<td valign="top"><asp:Button Text="Remove User(s) from Role" id="RemoveUsersButton"
runat="server" OnClick="RemoveUsers_OnClick" /></td>
</tr>
</table>
</form>
</body>
</html>
<%@ 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 String
Public Sub Page_Load()
Msg.Text = ""
If Not IsPostBack Then
' Bind roles to ListBox.
rolesArray = Roles.GetAllRoles()
RolesListBox.DataSource = rolesArray
RolesListBox.DataBind()
End If
End Sub
Public Sub RolesListBox_OnSelectedIndexChanged(sender As Object, args As EventArgs)
' Bind users to ListBox.
users = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
UsersListBox.DataSource = users
UsersListBox.DataBind()
End Sub
Public Sub RemoveUsers_OnClick(sender As Object, args As EventArgs)
' Verify that at least one user and a 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
If RolesListBox.SelectedItem Is Nothing Then
Msg.Text = "Please select a role."
Return
End If
' Create list of users to be removed from the selected role.
Dim usersList(user_indices.Length - 1) As String
For i As Integer = 0 To usersList.Length - 1
usersList(i) = UsersListBox.Items(user_indices(i)).Value
Next
' Remove the users from the selected role.
Try
Roles.RemoveUsersFromRole(usersList, RolesListBox.SelectedItem.Value)
Msg.Text = "User(s) removed from Role."
' Rebind users to ListBox.
users = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
UsersListBox.DataSource = users
UsersListBox.DataBind()
Catch e As HttpException
Msg.Text = e.Message
End Try
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<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" AutoPostBack="true"
OnSelectedIndexChanged="RolesListBox_OnSelectedIndexChanged"
runat="server" Rows="8" /></td>
<td valign="top">Users:</td>
<td valign="top"><asp:ListBox id="UsersListBox" Rows="8"
SelectionMode="Multiple" runat="server" /></td>
<td valign="top"><asp:Button Text="Remove User(s) from Role" id="RemoveUsersButton"
runat="server" OnClick="RemoveUsers_OnClick" /></td>
</tr>
</table>
</form>
</body>
</html>
Remarks
The RemoveUsersFromRole method calls the default role provider to remove the specified users from the specified role at the data source.
If the application uses the SqlRoleProvider class, the database updates that are performed during the call to the RemoveUsersFromRoles method are made within a transaction. If an error is encountered, such as a user name that is not in a specified role, the transaction is rolled back and no updates are performed.
Applies to
See also
משוב
https://aka.ms/ContentUserFeedback.
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