SqlRoleProvider.GetAllRoles Method ()

 

Gets a list of all the roles for the application.

Namespace:   System.Web.Security
Assembly:  System.Web (in System.Web.dll)

Public Overrides Function GetAllRoles As String()

Return Value

Type: System.String()

A string array containing the names of all the roles stored in the database for a particular application.

Exception Condition
System.Configuration.Provider.ProviderException

An unknown error occurred while communicating with the database.

The GetAllRoles method is called by the Roles class to retrieve a list of all the roles in the SQL Server database specified in the ASP.NET application's configuration file (Web.config).

The following code example uses the GetAllRoles method to get the list of roles for an application and bind the results to a System.Web.UI.WebControls.GridView control. For an example of a Web.config file that enables role management, see SqlRoleProvider.

System_CAPS_security Security Note

This example contains a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ 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

Public Sub Page_Load(sender As Object, args As EventArgs)

  If Not IsPostBack Then
    ' Bind roles to GridView.

    rolesArray = Roles.GetAllRoles()
    RolesGrid.DataSource = rolesArray
    RolesGrid.DataBind()
  End If

End Sub

Public Sub CreateRole_OnClick(sender As Object, args As EventArgs)

  Dim createRole As String = RoleTextBox.Text

  Try
    If Roles.RoleExists(createRole) Then
      Msg.Text = "Role '" & Server.HtmlEncode(createRole) & "' already exists. Please specify a different role name."
      Return
    End If

    Roles.CreateRole(createRole)

    Msg.Text = "Role '" & Server.HtmlEncode(createRole) & "' created."

    ' Re-bind roles to GridView.

    rolesArray = Roles.GetAllRoles()
    RolesGrid.DataSource = rolesArray
    RolesGrid.DataBind()
  Catch
    Msg.Text = "Role '" & Server.HtmlEncode(createRole) & "' <u>not</u> created."
  End Try

End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Create Role</title>
</head>
<body>

<form runat="server" id="PageForm">
  <h3>Create a Role</h3>

  <asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />

  Role name: 

  <asp:TextBox id="RoleTextBox" runat="server" />

  <asp:Button Text="Create Role" id="CreateRoleButton"
              runat="server" OnClick="CreateRole_OnClick" />

  <br />

  <asp:GridView runat="server" CellPadding="2" id="RolesGrid" 
                Gridlines="Both" CellSpacing="2" AutoGenerateColumns="false" >
    <HeaderStyle BackColor="navy" ForeColor="white" />
    <Columns>
      <asp:TemplateField HeaderText="Roles" >
        <ItemTemplate>
          <%# Container.DataItem.ToString() %>
        </ItemTemplate>
      </asp:TemplateField>
    </Columns>
   </asp:GridView>
</form>

</body>
</html>

.NET Framework
Available since 2.0
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