/// <summary>
/// 删除用户记录（删除用户时使用）
/// </summary>
/// <param name="userId">被删除用户</param>
/// <param name="takeOverUserName">接管用户名</param>
/// <param name="takeOverAll">是否接管被删除用户的所有内容</param>
public void DeleteUser(long userId, string takeOverUserName, bool takeOverAll)
{
//设计要点：
//1.利用sql转移给接管用户、删除专题成员、专题成员申请；
//2.删除专题成员时，维护专题的成员数；
//如果没设置由谁接管专题，就把专题转给网站初始管理员
long takeOverUserId = 0;
if (string.IsNullOrEmpty(takeOverUserName))
{
takeOverUserId = new SystemDataService().GetLong("Founder");
}
else
{
takeOverUserId = UserIdToUserNameDictionary.GetUserId(takeOverUserName);
}
IUserService userService = DIContainer.Resolve <IUserService>();
User takeOver = userService.GetFullUser(takeOverUserId);
groupRepository.DeleteUser(userId, takeOver, takeOverAll);
}