Hi Monika,

Thanks for the help, It is still work in progress.. I have another issue that I need to resolve,  It is somehow related to the way control operates.. After I've read the stream ( string xmlDt = impOS.ReadLR4OneSourceSpreadsheet(e.FileStream); ) I do some data save and then has to seamlessly transfer to other page that does processing and representation.. The upload control while sending file to the server does not cause page to postback... so there is seems like no lifecycle page events where I can put Server.Transfer request and naturally if I would put it into UploadFinishing event like below I will get {"Error executing child request for Uno.aspx."}, because it is apparently wrong context.. Would you advise how to deal with transfer in the WebForm environment while using this control for Upload.. The transfer is needed right after file read in the  UploadFinishing event.. 

protected void WebUpload1_UploadFinishing(object sender

, nfragistics.Web.UI.EditorControls.UploadFinishingEventArgs e)
{
LR4OneSourceImport impOS = new LR4OneSourceImport();
string xmlDt = impOS.ReadLR4OneSourceSpreadsheet(e.FileStream);
// e.Cancel = true;
Server.Transfer("Uno.aspx", true);
}

Thanks.

Also Server.Transfer is a preferred way as I'll be reading some XML data stored in the first page with the upload control... 

And also while trying to gain more understanding how control works and what options are : 

if I add event :

function WebUpload1_FileUploaded(eventArgs, infoObject)
{
//Add code to handle your event here.
var loc = $("#hdnSiteRootUrl").val();
alert(loc);
window.location.replace(loc);
}

it will redirect to the next page.. the only thing I want to understand is the following.. if I assign value to the hidden variable during some page lifecycle events e.g. Page_Load (hdnSiteRootUrl.Value = "https://localhost:44319/Uno.aspx";)  - it will work, if I would assign value to the hdnSiteRootUrl in WebUpload1_UploadFinishing or WebUpload1_UploadFinished then in WebUpload1_FileUploaded hdnSiteRootUrl  will be "Original" i.e. initial value .. I wonder why...  

<input id="hdnSiteRootUrl" runat="server" type="hidden" value="Original" />

FileSelecting

Hi Stamen.. FileSelected works fine. Thanks for your help.

Hello Michael,

I am sorry for the delayed response!

I had to dig in a bit deeper  but you are right, the FileUploading event cannot really be used to cancel uploads on user request as it is fired during the uploading progress, after the request has already been made. It could work for larger files where the user has some time to decide but it's overall better to use FileSelected.

Alternatively, if FileSelected doesn't meet your UX requirements, I can create a workaround hijacking the click event on Upload button so that you can hook to it. Let me know if you prefer that.

Best regards,

Stamen Stoychev

I guess if nothing else, like attach somehow click event to the uploadStart button (2nd phase), I can put confirm to FileSelecting event..