Working with Request.Files and Changing from POST to GET without reloading page?

[Sean]

Hi Telerik,

I am trying to figure out if I have something wrong with my architecture, or if I am just in need of a quick fix.

I have the following on my page:

<csw:UploadDashboardRadWindow ID="UploadDashboardWindow" Runat="Server">
    <ContentTemplate>
        <div ID="UploadDashboardDecorationZone">
            <fieldset id="UploadDashboard">
                <legend>Upload Dashboard</legend>
                <telerik:RadUpload ID="UploadDashboardSelector" Runat="server" Width="235px" AllowedFileExtensions=".xml"  MaxFileInputsCount="1" ControlObjectsVisibility="None" />
            </fieldset>
            <div class="BottomButton">
                <telerik:RadButton ID="SubmitUploadDashboardButton" Runat="Server" Text="Upload" OnClientClicked="CloseUploadDashboard" />
            </div>
        </div>
    </ContentTemplate>
</csw:UploadDashboardRadWindow>

and the following server-side code:

protected void Page_Init(object sender, EventArgs e)
{
    if (Request.Files.Count > 0) HandleUploadedFile();
}

HandleUploadedFiles() works perfectly fine, but I am left with my Request's HTTPMethod set to POST and not GET. This means that if the user tries to refresh my Web Application they are prompted with a confirm form resubmission alert.

Previously, I had fixed this with the following:

Page.Response.Redirect(Page.Request.Url.ToString(), true);

But new additions to my code makes this a non-acceptable solution. Namely, I have implemented Start Edit / Cancel Edit / Save Changes -- and refreshing the page is analogous to 'Cancel Edit.' As such, refreshing via code isn't a possibility.

Could you show me how to parse an uploaded file while keeping the RadWindow wrapped in an update panel? Whenever I try to do it, Request.Files.Count is 0. 

Thanks

[Peter Filipov]

Hello Sean,

Please note that it is not possible to use RadUpload control into update panel - limitation of the
XmlHttpRequest object. You need to do a regular postback.
For more details review the following help article.

In case that the problem is not connected with described above, please provide me a working sample project that reproduces your issue.

Kind regards,
Peter Filipov
the Telerik team

[Sean]

Hi Peter,

No sample project to provide as it is reproducible on RadUpload - First Look. Go to this page, select any file and click upload. Now, refresh the page. 

You will be prompted with a 'Confirm Form Resubmission' dialog, varying by browser. This is because Request's HTTPMethod is being left as 'POST' and not 'GET'.

I would like to know how to craft my code such that this message does not occur without using the provided Response.Redirect code-snippet.

I am OK with the initial page reload -- that is expected, but I would like the user to be able to refresh the page without any negative consequences.

Sean

[Peter Filipov]

Hi Sean,

As far as I researched about resubmission of the form, I found out that the way to avoid resubmission is to implement PRG pattern and it is with redirection.

I will be glad to assist you again.

Best wishes,
Peter Filipov
the Telerik team