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Roles.DeleteRole Method (String)

Removes a role from the data source.

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

public static bool DeleteRole(
	string roleName
)

Parameters

roleName
Type: System.String

The name of the role to delete.

Return Value

Type: System.Boolean
true if roleName was deleted from the data source; otherwise, false.

ExceptionCondition
System.ArgumentNullException

roleName is null.

System.ArgumentException

roleName is an empty string or contains a comma (,).

System.Configuration.Provider.ProviderException

roleName has one or more members.

-or-

Role management is not enabled.

The DeleteRole method removes a role name from the data source. DeleteRole calls the DeleteRole method of the default role provider to remove the specified role from the data source.

If the role identified by the roleName parameter has one or more members, then an exception will be thrown and the role will not be deleted.

The following code example deletes a role from the data source. For an example of a Web.config file that enables role management, see Roles.


<%@ 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;

  public void Page_Load(object sender, EventArgs args)
  {
    if (!IsPostBack)
    {
      // Bind roles to ListBox.

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


  public void DeleteRole_OnClick(object sender, EventArgs args)
  {
    string delRole = "";

    try
    {
      delRole = RolesListBox.SelectedItem.Value;

      Roles.DeleteRole(delRole);

      Msg.Text = "Role '" + Server.HtmlEncode(delRole) + "' deleted.";


      // Re-bind roles to ListBox.

      rolesArray = Roles.GetAllRoles();
      RolesListBox.DataSource = rolesArray;
      RolesListBox.DataBind();
    }
    catch
    {
      Msg.Text = "Role '" + Server.HtmlEncode(delRole) + "' <u>not</u> deleted.";
    }

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
  <title>Sample: Delete Role</title>
</head>
<body>
  <form runat="server" id="PageForm">
    <h3>
      Delete Role</h3>
    <asp:Label ID="Msg" ForeColor="maroon" runat="server" /><br />
    <table border="0">
      <tr>
        <td valign="top">
          Delete Role:</td>
        <td valign="top">
          <asp:ListBox ID="RolesListBox" runat="server" Rows="8" /></td>
        <td valign="top">
          <asp:Button Text="Delete Role" ID="DeleteRoleButton" runat="server" OnClick="DeleteRole_OnClick" /></td>
      </tr>
    </table>
  </form>
</body>
</html>

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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