How should I use server side validation with ListView editor template

[Andrei]

I have a listview that has an editor template. I want to do server side validation (I check for uniqueness in my database) on create/update. Here is my code. Please tell me what to do to get this working.

01.public JsonResult CreateWatch([DataSourceRequest] DataSourceRequest request, HomeWatchListItem hw) {
02.    try {
03.        var result = uow.HomeWatchesRepository.FindBy(w => w.SerialNo == hw.SerialNo).FirstOrDefault();
04.        if (result != null) {
05.            ModelState.AddModelError("SerialNo", "Serial number already exists");
06.        }
07.        if (ModelState.IsValid) {
08.            uow.HomeWatchesRepository.Add(new HomeWatch {
09.                HomeServerId = hw.IdHomeServer,
10.                PatientId = hw.IdPatient,
11.                SerialNo = hw.SerialNo
12.            });
13.            uow.Commit();
14.        }
15.        return Json(new [] {hw}.ToDataSourceResult(request, ModelState));
16.    }
17.    catch (Exception ex) {
18.        //TODO: what to return here
19.        return Json(new DataSourceResult {Errors = ex.Message});
20.    }
21.}

When create the listView I add an error handler function that doesn't get called no matter what I do.

01.@(Html.Kendo().ListView<HomeWatchListItem>().Name("watchesListView")
02.    .DataSource(ds => {
03.        ds.Read(r => {
04.            r.Action("GetWatches", "Watches").Type(HttpVerbs.Post);
05.        }).Create(c => {
06.            c.Action("CreateWatch", "Watches").Type(HttpVerbs.Post);
07.        }).Update(u => {
08.            u.Action("EditWatch", "Watches").Type(HttpVerbs.Post);
09.        }).Destroy(d => {
10.            d.Action("DeleteWatch", "Watches").Type(HttpVerbs.Post);
11.        })
12.        .Events(e => {
13.            e.Error("alert('a')");
14.        })
15.        .ServerOperation(true)
16.        .PageSize(4)
17.        .Model(m => {
18.            m.Id("Id");
19.            m.Field<int>("IdPatient");
20.            m.Field<int>("IdHomeServer");
21.            m.Field<string>("PatientName");
22.            m.Field<string>("HomeServerName");
23.        });
24.    })
25.    .ClientTemplateId("watch-template")
26.    .Editable(e => {
27.        e.TemplateName("edit-watch-template");
28.    })
29.    .TagName("div")
30.    .HtmlAttributes(new { @class = "k-widget k-listview" })
31.    .Pageable()
32.    .Deferred()
33.)

[Daniel]

Hello Andrei,

Please check the sample project in this forum thread. It demonstrates how to show the server error messages when using a listview.

Regards,
Daniel
Telerik