Add back previous file list into radupload

[Ervinna]

Hi,

i have a radupload that will perform a validate some fields value before upload the file. Wen the validation return false, i will cancel the upload and i want to get back the file list and display back to the radupload after cancel the upload. The reupload function return me an error.

{System.NullReferenceException: Object reference not set to an instance of an object.
   at DragDropUpload.MainPage.ReUploadItems()}

what wrong of the code? and how can i display back the list of file that browsed?

The code example are below:-

Private Sub RadUpload1_UploadStarted(ByVal sender As Object, ByVal e As Telerik.Windows.Controls.UploadStartedEventArgs) Handles RadUpload1.UploadStarted
        Dim list As New ObservableCollection(Of MyDatabaseService.clsImportDoc)

        Try

            If Not FormBase Is Nothing Then
                Dim dgPF As New Grid
                dgPF = CType(FormBase.FindName("dgProfileFields"), Grid)

                For i As Integer = 0 To dgPF.Children.Count - 1

                    If TypeOf (dgPF.Children.Item(i)) Is TextBox Then
                        Dim txtPF As New TextBox
                        txtPF = CType(dgPF.Children.Item(i), TextBox)

                        list.Add(New clsImportDoc With {.ProfileFieldsNames = txtPF.Name.ToString, .ProfileFieldValues = txtPF.Text.ToString, .ProfileID = ddpProfile.SelectedValue})
                    ElseIf TypeOf (dgPF.Children.Item(i)) Is RadDatePicker Then
                        Dim rdpPF As New RadDatePicker
                        rdpPF = CType(dgPF.Children.Item(i), RadDatePicker)

                        list.Add(New clsImportDoc With {.ProfileFieldsNames = rdpPF.Name.ToString, .ProfileFieldValues = rdpPF.DateTimeText.ToString, .ProfileID = ddpProfile.SelectedValue})
                    End If
                Next
            End If

            AddHandler client.fValidateIndexValueCompleted, AddressOf client_fValidateIndexValueCompleted
            client.fValidateIndexValueAsync(list)

        Catch ex As Exception
            client.sWriteErrorLogAsync("RadUpload1_UploadStarted (MainPage Silverlight Import) : " & ex.Message)
        End Try

    End Sub

 Private Sub client_fValidateIndexValueCompleted(ByVal sender As Object, ByVal e As fValidateIndexValueCompletedEventArgs)
        Dim strValidateResult As String = ""

        Try

            strValidateResult = e.Result

            If strValidateResult <> "1" Then
                lblErrorMessage.Visibility = Windows.Visibility.Visible
                lblErrorMessage.Content = strValidateResult

                SaveFiles()
                RadUpload1.CancelUpload()
                ReUploadItems()
            End If

        Catch ex As Exception
            client.sWriteErrorLogAsync("client_fValidateIndexValueCompleted (MainPage Silverlight Import) : " & ex.Message)
        End Try

    End Sub

Private files As New List(Of FileInfo)()

    Private Sub ReUploadItems()
        '/ put the files back in the upload
        Try

            If files.Count > 0 Then
                For Each file As FileInfo In files
                    Dim f As New RadUploadSelectedFile(file)
                    RadUpload1.CurrentSession.SelectedFiles.Add(f)
                Next
            End If

        Catch ex As Exception

        End Try
    End Sub

    Private Sub SaveFiles()
        '/ get the files from the upload.
        'Dim files As New List(Of FileInfo)()
        files.Clear()
        For Each item As Object In RadUpload1.CurrentSession.SelectedFiles
            files.Add(item.File)
        Next
    End Sub

[Alex Fidanov]

Hi Ervinna,

Please take a look at the approach from this forum post here. Let us know if that is what you are trying to achieve.

Greetings,
Alex Fidanov
the Telerik team

[Ervinna]

Hi Alex Fidanov,

I'm also got see this approach but i can't figure the idea how to done it. when i put the 'RadUpload1.PrepareSelectedFilesForUpload()' in my project, i get " 'PrepareSelectedFilesForUpload' is not a member of 'telerik.windows.controls.radupload'. ".i got Imports Telerik.Windows.Controls but does not help. i'm using silverlight 4 Q2 2010. 

Do you have any sample to archive this?

thanks.

[Alex Fidanov]

Hello Ervinna,

This method was introduced in a later version than Q2 to facilitate manipulating the upload items with procedural code. If it is possible for you to upgrade to Q3 and test this?

All the best,
Alex Fidanov
the Telerik team

[Ervinna]

Hi Alex Fidanov,

Yes. work well now after upgrate to Q3. thanks.

[Raja]

Hi,

I am looking for C# code to add the files manually to the RadUpload control.  Per this example, there is a way to add files in VB.net.  Please let me know if there is a possibility to do that in C#.  This is something urgent to do.

thanks
raja

[Tina Stancheva]

Hi Raja,

You can examine this article to see how to create a custom RadUpload control manually adding a list of files. The code snippets are both in C# and VB.NET so you can use the C# examples.

Let me know if that helps or if you need more information.

Regards,
Tina Stancheva
the Telerik team

[Raja]

Hi Tina,

Thanks for your response!

I am trying to acheive this functionality for Web Controls(aspx).  can you please let me know the namespace that i can use to implement this piece in Web Forms instead of Windows?

Thanks
Raja

[Kate]

Hi Raja,

Can you please clarify if you refer to the RadUpload for Silverlight or the one from the ASP.NET AJAX suit, since the article from the previous post concerns the Silverlight control?

All the best,
Kate
the Telerik team

[Raja]

Hi Kate,

I am looking for code(C# and ASP.net) that will help me to add the file into RadUpload control basically web application. 

Thanks
Raja

[Kate]

Hi Raja,

Unfortunately with the RadUpload control you can not manually add files to the control. Since it is a security limitation, in order to add files to the control you will need to use the dialog window and choose the files that you will be uploading. You can also refer to our on-line demos for more and detailed examples:
http://demos.telerik.com/aspnet-ajax/upload/examples/overview/defaultcs.aspx

Kind regards,
Kate
the Telerik team