/// <summary>
 /// 新增活动
 /// </summary>
 /// <param name="request"></param>
 /// <returns></returns>
 public async Task <OperationResult <bool> > AddActivityAsync(T_Activity_xhrModel request)
 {
     if (string.IsNullOrWhiteSpace(request.Title))
     {
         return(OperationResult.FromError <bool>("-31", string.Format(Resource.ParameterError_IsRequired, "标题")));
     }
     if (string.IsNullOrWhiteSpace(request.ActivityContent))
     {
         return(OperationResult.FromError <bool>("-31", string.Format(Resource.ParameterError_IsRequired, "内容")));
     }
     if (request.StartTime >= request.EndTime || request.StartTime == DateTime.MinValue || request.EndTime == DateTime.MinValue)
     {
         return(OperationResult.FromError <bool>("-31", "时间参数错误"));
     }
     if (string.IsNullOrWhiteSpace(request.Picture))
     {
         return(OperationResult.FromError <bool>("-31", string.Format(Resource.ParameterError_IsRequired, "图片地址")));
     }
     return(OperationResult.FromResult <bool>(await ActivityManager.AddActivityAsync(request)));
 }