SqlRoleProvider.GetUsersInRole(String) Methode

Definitie

Naamruimte:: System.Web.Security

Assembly:: System.Web.dll

Belangrijk

Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.

Hiermee haalt u een lijst op met gebruikers in de opgegeven rol.

public:
 override cli::array <System::String ^> ^ GetUsersInRole(System::String ^ roleName);

public override string[] GetUsersInRole(string roleName);

override this.GetUsersInRole : string -> string[]

Public Overrides Function GetUsersInRole (roleName As String) As String()

Parameters

roleName: String

De naam van de rol voor het ophalen van de lijst met gebruikers.

Retouren

String[]

Een tekenreeksmatrix met de namen van alle gebruikers die lid zijn van de opgegeven rol.

Uitzonderingen

ArgumentNullException

roleName is null.

ArgumentException

roleName is een lege tekenreeks of bevat een komma.

– of –

roleName is langer dan 256 tekens.

ProviderException

rolename is niet gevonden in de database.

– of –

Er is een onbekende fout opgetreden tijdens de communicatie met de database.

Voorbeelden

In het volgende codevoorbeeld wordt de GetUsersInRole methode gebruikt om een lijst met de gebruikers in een bepaalde rol op te halen en de resultaten te binden aan een System.Web.UI.WebControls.GridView besturingselement. Zie voor een voorbeeld van een Web.config-bestand dat rolbeheer SqlRoleProvidermogelijk maakt.


<%@ 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;
  MembershipUserCollection users;
  string[] usersInRole;

  public void Page_Load()
  {
    Msg.Text = "";

    if (!IsPostBack)
    {
      // Bind roles to ListBox.

      rolesArray = Roles.GetAllRoles();
      RolesListBox.DataSource = rolesArray;
      RolesListBox.DataBind();

      // Bind users to ListBox.

      users = Membership.GetAllUsers();
      UsersListBox.DataSource = users;
      UsersListBox.DataBind();
    }

    if (RolesListBox.SelectedItem != null)
    {
      // Show users in role. Bind user list to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
      UsersInRoleGrid.DataSource = usersInRole;
      UsersInRoleGrid.DataBind();
    }
  }


  public void AddUsers_OnClick(object sender, EventArgs args)
  {
    // Verify that a role is selected.

    if (RolesListBox.SelectedItem == null)
    {
      Msg.Text = "Please select a role.";
      return;
    }


    // Verify that at least one user is selected.

    if (UsersListBox.SelectedItem == null)
    {
      Msg.Text = "Please select one or more users.";
      return;
    }


    // Create list of users to be added to the selected role.

    string[] newusers = new string[UsersListBox.GetSelectedIndices().Length];

    for (int i = 0; i < newusers.Length; i++)
    {
      newusers[i] = UsersListBox.Items[UsersListBox.GetSelectedIndices()[i]].Value;
    }


    // Add the users to the selected role.

    try
    {
      Roles.AddUsersToRole(newusers, RolesListBox.SelectedItem.Value);

      // Re-bind users in role to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
      UsersInRoleGrid.DataSource = usersInRole;
      UsersInRoleGrid.DataBind();
    }
    catch (Exception e)
    {
      Msg.Text = e.Message;
    }
  }


  public void UsersInRoleGrid_RemoveFromRole(object sender, GridViewCommandEventArgs args)
  {
    // Get the selected user name to remove.

    int index = Convert.ToInt32(args.CommandArgument);

    string username = ((DataBoundLiteralControl)UsersInRoleGrid.Rows[index].Cells[0].Controls[0]).Text;


    // Remove the user from the selected role.

    try
    {
      Roles.RemoveUserFromRole(username, RolesListBox.SelectedItem.Value);
    }
    catch (Exception e)
    {
      Msg.Text = "An exception of type " + e.GetType().ToString() +
                 " was encountered removing the user from the role.";
    }


    // Re-bind users in role to GridView.

    usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
    UsersInRoleGrid.DataSource = usersInRole;
    UsersInRoleGrid.DataBind();
  }



</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" runat="server" Rows="8" AutoPostBack="true" /></td>
        <td valign="top">
          Users:</td>
        <td valign="top">
          <asp:ListBox ID="UsersListBox" DataTextField="Username" Rows="8" SelectionMode="Multiple"
            runat="server" /></td>
        <td valign="top">
          <asp:Button Text="Add User(s) to Role" ID="AddUsersButton" runat="server" OnClick="AddUsers_OnClick" /></td>
      </tr>
      <tr>
        <td valign="top">
          Users In Role:</td>
        <td valign="top">
          <asp:GridView runat="server" CellPadding="4" ID="UsersInRoleGrid" AutoGenerateColumns="false"
            GridLines="None" CellSpacing="0" OnRowCommand="UsersInRoleGrid_RemoveFromRole">
            <HeaderStyle BackColor="navy" ForeColor="white" />
            <Columns>
              <asp:TemplateField HeaderText="User Name" >
                <ItemTemplate>
                  <%# Container.DataItem.ToString() %>
                </ItemTemplate>
              </asp:TemplateField>
              <asp:ButtonField Text="Remove From Role" ButtonType="Link" />
            </Columns>
          </asp:GridView>
        </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 MembershipUserCollection
  Dim usersInRole() As String

  Public Sub Page_Load()

    Msg.Text = ""

    If Not IsPostBack Then
      ' Bind roles to ListBox.

      rolesArray = Roles.GetAllRoles()
      RolesListBox.DataSource = rolesArray
      RolesListBox.DataBind()

      ' Bind users to ListBox.

      users = Membership.GetAllUsers()
      UsersListBox.DataSource = users
      UsersListBox.DataBind()
    End If

    If Not RolesListBox.SelectedItem Is Nothing Then
      ' Show users in role. Bind user list to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
      UsersInRoleGrid.DataSource = usersInRole
      UsersInRoleGrid.DataBind()
    End If

  End Sub


  Public Sub AddUsers_OnClick(ByVal sender As Object, ByVal args As EventArgs)

    ' Verify that a role is selected.

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


    ' Verify that at least one user is selected.

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


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

    Dim newusers(UsersListBox.GetSelectedIndices().Length - 1) As String

    For i As Integer = 0 To newusers.Length - 1
      newusers(i) = UsersListBox.Items(UsersListBox.GetSelectedIndices(i)).Value
    Next


    ' Add the users to the selected role.

    Try
      Roles.AddUsersToRole(newusers, RolesListBox.SelectedItem.Value)

      ' Re-bind users in role to GridView.

      usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
      UsersInRoleGrid.DataSource = usersInRole
      UsersInRoleGrid.DataBind()
    Catch e As Exception
      Msg.Text = e.Message
    End Try

  End Sub


  Public Sub UsersInRoleGrid_RemoveFromRole(ByVal sender As Object, ByVal args As GridViewCommandEventArgs)

    ' Get the selected user name to remove.

    Dim index As Integer = Convert.ToInt32(args.CommandArgument)

    Dim username As String = (CType(UsersInRoleGrid.Rows(index).Cells(0).Controls(0), DataBoundLiteralControl)).Text


    ' Remove the user from the selected role.

    Try
      Roles.RemoveUserFromRole(username, RolesListBox.SelectedItem.Value)
    Catch e As Exception
      Msg.Text = "An exception of type " & e.GetType().ToString() & _
                 " was encountered removing the user from the role."
    End Try

    ' Re-bind users in role to GridView.

    usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value)
    UsersInRoleGrid.DataSource = usersInRole
    UsersInRoleGrid.DataBind()

  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" runat="server" Rows="8" AutoPostBack="true" /></td>
        <td valign="top">
          Users:</td>
        <td valign="top">
          <asp:ListBox ID="UsersListBox" DataTextField="Username" Rows="8" SelectionMode="Multiple"
            runat="server" /></td>
        <td valign="top">
          <asp:Button Text="Add User(s) to Role" ID="AddUsersButton" runat="server" OnClick="AddUsers_OnClick" /></td>
      </tr>
      <tr>
        <td valign="top">
          Users In Role:</td>
        <td valign="top">
          <asp:GridView runat="server" CellPadding="4" ID="UsersInRoleGrid" AutoGenerateColumns="false"
            GridLines="None" CellSpacing="0" OnRowCommand="UsersInRoleGrid_RemoveFromRole">
            <HeaderStyle BackColor="navy" ForeColor="white" />
            <Columns>
              <asp:TemplateField HeaderText="User Name" >
                <ItemTemplate>
                  <%# Container.DataItem.ToString() %>
                </ItemTemplate>
              </asp:TemplateField>
              <asp:ButtonField Text="Remove From Role" ButtonType="Link" />
            </Columns>
          </asp:GridView>
        </td>
      </tr>
    </table>
  </form>
</body>
</html>

Opmerkingen

De methode GetUsersInRole wordt aangeroepen door de klasse Roles om de lijst met gebruikers op te halen die zijn gekoppeld aan de opgegeven rol in de SQL Server-database die is opgegeven in het configuratiebestand van de ASP.NET toepassing (Web.config).

Van toepassing op

Zie ook

Onderstaand ASP.NET rolbeheer

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