public async Task <string> Save()
{
try
{
string PostObjectStr = await GetPostData();
PO_Result_Save PostObject = JsonConvert.DeserializeObject <PO_Result_Save>(PostObjectStr);
DB = new DBSContext();
string Message = "";
if (!IsValid(PostObject, out Message))
{
return(JsonConvert.SerializeObject(new { IsSuccess = false, Message = Message }));
}
Result _Result = 0 == PostObject.Id ? new Result() : DB.Results.Find(PostObject.Id);
_Result.StudentId = PostObject.StudentId;
_Result.SubjectId = PostObject.SubjectId;
_Result.Mark = Math.Round(PostObject.Mark, 2);
if (0 == PostObject.Id)
{
_Result.DateOfEntry = DateTime.Now;
DB.Results.Add(_Result);
}
DB.SaveChanges();
return(JsonConvert.SerializeObject(new { IsSuccess = true }));
}
catch (Exception ex)
{
return(JsonConvert.SerializeObject(new {
IsSuccess = false,
Message = Common.GetError(ex)
}));
}
}
private bool IsValid(PO_Result_Save PostObject, out string Message)
{
Message = "";
if (0 == PostObject.StudentId)
{
Message = "Student is Required!";
return(false);
}
if (0 == PostObject.SubjectId)
{
Message = "Subject is Required!";
return(false);
}
if (0 == PostObject.Mark)
{
Message = "Mark is Required!";
return(false);
}
if (PostObject.Mark < 0)
{
Message = "Mark can not be negetive!";
return(false);
}
if (PostObject.Mark > 100)
{
Message = "Mark can not be greater than 100!";
return(false);
}
if (0 == PostObject.Id && DB.Results.Where(x => x.StudentId == PostObject.StudentId &&
x.SubjectId == PostObject.SubjectId).Count() > 0)
{
Message = "Duplicate Exists!";
return(false);
}
if (PostObject.Id > 0 && DB.Results.Where(x => x.StudentId == PostObject.StudentId &&
x.SubjectId == PostObject.SubjectId && x.ResultId != PostObject.Id).Count() > 0)
{
Message = "Duplicate Exists!";
return(false);
}
return(true);
}
