This documentation is archived and is not being maintained.

RoleGroup.ContainsUser Method

Indicates whether the specified user is a member of any of the roles in the role group.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public bool ContainsUser(
	IPrincipal user


Type: System.Security.Principal.IPrincipal
The user name to look for in the role group.

Return Value

Type: System.Boolean
true if the user is a member of one of the roles associated with this role group; otherwise, false.


User is null.

The ContainsUser method returns true if the specified user is a member of any of the roles associated with this role group. Roles are searched in the order they are listed in the Roles property, and searching stops after the first match is found.

This method uses the IsUserInRole method to determine whether a user is a member of a role. You must configure role management to use the ContainsUser method. For more information, see Understanding Role Management.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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