/// <summary>
        /// 根据成员的ID实现项目成员的增删
        /// </summary>
        /// <param name="request"></param>
        /// <param name="database"></param>
        /// <param name="project"></param>
        /// <param name="projectMemberIDs"></param>
        public static void SaveComOpeProjectMembers(this HttpRequest request, IDatabase database, Project project, string projectMemberIDs)
        {
            var memberID = projectMemberIDs.Split(',');
            var projectMembers = database.ProjectMembers.Where(d => d.ProjectID == project.ID);
            foreach (var item in projectMembers)
            {
                item.Delete(database);
            }

            foreach (var item in memberID)
            {
                if (item != string.Empty)
                {
                    var intItem = Convert.ToInt32(item);
                    var user = database.Users.SingleOrDefault(d => d.ID == intItem);
                    var expert = database.Experts.SingleOrDefault(d => d.UserID == user.ID);

                    var projectMember = new ProjectMember();
                    projectMember.Member = user;
                    projectMember.Project = project;
                    projectMember.College = expert.College;

                    projectMember.Save(database);
                }
            }

            /*if (projectMemberIDs.Split(',').Count() > 0)
            {
                //存项目成员
                for (var j = 0; j < projectMemberIDs.Split(',').Count() - 1; j++)
                {
                    var projectMember = new ProjectMember();
                    projectMember.Project = project;
                    var mId = projectMemberIDs.Split(',')[j];
                    int idm = Convert.ToInt32(mId);
                    var member = database.Users.GetByID(idm);//应该是Expert?
                    var ifProjectMember = database.ProjectMembers.SingleOrDefault(pm => pm.Project == project && pm.Member == member);
                    if (ifProjectMember == null)
                    {
                        projectMember.Member = member;
                        projectMember.Save(database);
                    }
                }
            }*/
        }
 /// <summary>
 /// 根据成员的ID存储项目成员
 /// </summary>
 /// <param name="request"></param>
 /// <param name="database"></param>
 /// <param name="project"></param>
 /// <param name="projectMemberIDs"></param>
 public static void SaveProjectMembers(this HttpRequest request, IDatabase database, Project project, string projectMemberIDs)
 {
     if (projectMemberIDs.Split(',').Count() > 0)
     {
         //存项目成员
         for (var j = 0; j < projectMemberIDs.Split(',').Count() - 1; j++)
         {
             var projectMember = new ProjectMember();
             projectMember.Project = project;
             var mId = projectMemberIDs.Split(',')[j];
             int idm = Convert.ToInt32(mId);
             var member = database.Users.GetByID(idm);//应该是Expert?
             var ifProjectMember = database.ProjectMembers.SingleOrDefault(pm => pm.Project == project && pm.Member == member);
             if (ifProjectMember == null)
             {
                 projectMember.Member = member;
                 projectMember.Save(database);
             }
         }
     }
 }