IsMember Method
后续版本的 Microsoft SQL Server 将删除该功能。 请避免在新的开发工作中使用该功能，并着手修改当前还在使用该功能的应用程序。
The IsMember method returns TRUE when the user or login referenced is a member of the role identified in the Role argument.
语法
object.IsMember(Role)
Parts
object
Expression that evaluates to an object in the Applies To list.Role
String that identifies a Microsoft SQL Server or database role by name.
Prototype (C/C++)
HRESULT IsMember(SQLDMO_LPCSTR szRole,
LPBOOL pRetVal);
注释
For the Login object, the Role argument specifies a server role. For the User object, a system or user-defined database role is identified by the argument.