Hi again!

I modified the save function to handle the updated data and it seems to work as intended now. In my case, I only need to update the RowVersion since all other updated cells are correct. The code is as follows, which may help others in similar situation. This also include sending an error message when something goes wrong when saving on the server side, using the response.responseText.

        $("#saveChanges").on('igbuttonclick',
            function (e) {
                grid.igGrid("saveChanges", function (data) {
                    grid.igGridUpdating("setCellValue", data.Id, "RowVersion", data.RowVersion);
                }, function (response) {
                    var res = JSON.parse(response.responseText);
                    alert(res);
                });
                loadingIndicator.hide();
                $(this).igButton("disable");
                return false;
            }
        );

On server side I return either

return Request.CreateResponse(HttpStatusCode.OK, updatedModel);

or on error

return Request.CreateResponse(HttpStatusCode.BadRequest, ModelState.Values.Where(v => v.Errors.Count > 0).SelectMany(e => e.Errors.Select(m => m.ErrorMessage)).ToList());

Thanks for the information. I think that would be a good way to include the actual rowversion.

I have tried my solution in a different way, which seems to suite my solution better. I have made a new test project using  REST instead. In this case I have found it easier to handle errors, such as the concurrency error, but it is not working all the way. So with using this variant instead, I have a few questions:

When saving an updated row with success, I return

Request.CreateResponse(HttpStatusCode.OK, updatedModel);

with my PUT action in the API.My problem is that the data in the grid is not updated. The editable fields are, but not my rowversion, which means that if I edit the same row again without refreshing the page, I will get a concurrency error due to different rowversion values between the grids row data and the data I load from the database to update. I thought the returned data would be used to update the grid, but this does not seem to be the case.

I tried to put grid.igGrid("dataBind") when I have success in updating, but this returns a 404, trying to GET an url such as "http://localhost:57786/Home/api/units/?pk=Id&_=1562318767427". In the grid, I use .DataSourceUrl(Url.Action("/api/units/")). If this must be used, what do I need to implement? The api is in its owm controller and the page displaying the grid is in the homecontroller.

I am using routing in both home and api controller like:

        [Route("unit/{id}/{date?}")]
        public ActionResult UnitIndex(string id, DateTime? date)

Is it possible this can be a problem?

Next, I am wondering if it is possible to use a asp mvc validation summary and return modelstate errors if any arise when updating. I have managed to display them for now, by extracting the actual messages and return them as a string array with the response, but using a validation summary would be better way. Is this possible?