SqlRoleProvider.GetRolesForUser(String) Metode
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mendapatkan daftar peran tempat pengguna berada.
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()
Parameter
- username
- String
Pengguna untuk mengembalikan daftar peran.
Mengembalikan
Array string yang berisi nama semua peran tempat pengguna yang ditentukan berada.
Pengecualian
username
adalah null
.
Terjadi kesalahan yang tidak diketahui saat berkomunikasi dengan database.
Contoh
Contoh kode berikut menggunakan GetRolesForUser metode untuk mengambil daftar peran untuk pengguna tertentu dan mengikatnya ke System.Web.UI.WebControls.GridView kontrol. Untuk contoh file Web.config yang memungkinkan manajemen peran, lihat SqlRoleProvider.
<%@ 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>
Keterangan
Metode GetRolesForUser ini dipanggil oleh Roles kelas untuk mengambil daftar peran pengguna tertentu dari database SQL Server yang ditentukan dalam file konfigurasi aplikasi ASP.NET (Web.config).