Issues On Cancellation

[David]

I am trying to redirect to another page on process cancellation (triggered by cancel button).

My progress event is running on separate thread, here is the code:

Public Sub ProgressArea()

        Do
            Dim dt As DataTable = AdminData.getLogPercent(Session("ProjectID"))

            Dim count As Integer = dt.Rows(0)("PercentDone")
            Dim message As String = dt.Rows(0)("RecordDesc")

            context.SecondaryValue = "Total Progress: " & count.ToString() + "%"
            context.SecondaryPercent = count.ToString()
            context.CurrentOperationText = message

            If Response.IsClientConnected = False Then

                Response.Redirect("redirect.aspx")

            End If

            If count < 98 Then
                'calls to itself to repeat
                Thread.Sleep(1000)
            Else
                Exit Do
            End If

        Loop

    End Sub

Code hits the redirect , but nothing happens. However if i redirect without clicking "Cancel" button it does work.

I am completely lost. Any help?

Thank you

[Peter Milchev]

Hello David,

The Cancel button is actually cancelling the request, which means the browser does not have any response from the server.

With that said, the only way to redirect on a cancel click is on the client-side.

Regards,
Peter Milchev
Progress Telerik

[David]

I see.

So, what is the client side event i can use?

[Peter Milchev]

Hello David,

I am afraid there is no clean way to subscribe to the cancel button click but you can either subscribe to the click event of the Cancel button or override the internal cancelRequest function:

1) Subscribe to the Cancel button click event

function pageLoadHandler() {
    $telerik.$("#<%= RadProgressArea1.ClientID %>").on("click", ".ruCancel", function () {
        // redirect here... 
        console.log("redirect...")
    })
    // Sys.Application.remove_load(pageLoadHandler);  
}
Sys.Application.add_load(pageLoadHandler);  

 

2) Override internal cancelRequest 

Telerik.Web.UI.RadProgressArea.prototype.cancelRequest = function () {
    this.cancelClicked = true;
    if (this.get_id() == "<%= RadProgressArea1.ClientID %>") {
        // redirect manually here
        console.log("redirect...")
    }
}

Regards,
Peter Milchev
Progress Telerik

[David]

Hi Peter,

I'll look into that

Thank you for your help

David