[CLOSED] Grid Error Handling

[adelaney]

When using your Grid with MVC, do you have any good examples of / best practices for error handling?

[Daniil]

Hi,

Unfortunately, we have no such example at the moment.

Though it should not be difficult.

To handle errors you need:

1. Set up

MessageProperty="message"

for the Store Reader.

2. Use the StoreResult Success and Message properties.

3. Handle the Exception event of Store or its Proxy.

For example, getting an error message (which you set up for a StoreResult) within the Proxy Exception listener would look like this:

<ext:AjaxProxy>
    <Listeners>
        <Exception Handler="alert(operation.getError());" />
    </Listeners>
</ext:AjaxProxy>

See also
http://docs.sencha.com/ext-js/4-1/#!...vent-exception

[adelaney]

Ok. I thought that was simple enough, but apparently not. When I have this combination:


Proxy:

 .Proxy(Sub(proxy)
                                                                             Dim prxy As New Ext.Net.AjaxProxy()
                                                                             With prxy
                                                                                 .API.Create = Url.Content("~/Assignments/_AddTeam/")
                                                                                 .API.Read = Url.Content("~/Assignments/_GetTeams/") + MvcApplication.CurrentApplicationUser.EmployeeID.ToString()
                                                                                 .API.Update = Url.Content("~/Assignments/_EditTeam")
                                                                                 .API.Destroy = ""
                                                                                 .Json = True
                                                                                 .Reader.Add(New Ext.Net.JsonReader() With {.Root = "Data", .AutoDataBind = True})
                                                                             End With
                                                                                     
                                                                             proxy.Add(prxy)
                                                                         End Sub) _

With this code:

<HttpPost()>
        Public Function _AddTeam(ByVal team As Models.CWTeam()) As Ext.Net.MVC.StoreResult
            Dim grid As New Ext.Net.MVC.StoreResult()

            If team IsNot Nothing Then
                Dim results As New List(Of Models.CWTeam)
                Dim svc As New Services.TeamService

                For Each tm In team
                    Try
                        results.Add(svc.CreateTeam(tm))
                        grid.Data = results
                    Catch ex As SystemException
                        grid.Message = ex.Message
                    End Try
                Next

                Return grid
            Else
                Return grid
            End If
        End Function

It throws a build error. When setting up the grid for error handling, am I supposed to use some other construct than the Proxy in the Razor syntax?
My code builds fine when returning a regular ActionResult from the Function that returns a view.

[Daniil]

It throws a build error.

Please always provide a bit more details about errors. So, please clarify what exactly error?

When setting up the grid for error handling, am I supposed to use some other construct than the Proxy in the Razor syntax?

Well, everything should look the same in Razor in that aspect.