[Solved] OnRemove e.data parameters always null

[Sean]

I'm using the onUpload and onRemove client events and attaching metadata per the documentation. It works great for onUpload, but when I set e.data for OnRemove, the values always come through as null. I even hardcoded one of the values for a parameter just to double-check that my variable shouldn't really be null. Am I doing something wrong?

        @(Html.Telerik().Upload()
            .Name("attachments")
            .Multiple(true)
            .Async(async => async
                .Save("SaveAttachment", "ControllerNameHere")
                .Remove("RemoveAttachment", "ControllerNameHere")
                .AutoUpload(true)
            )
            .ClientEvents(events => {
                events.OnRemove("onRemove");
                events.OnUpload("onUpload");
            })
        )



The javascript looks like this:

 

function onRemove(e) {

     e.data = { test: 1, imageIdentifier: $("#ImageIdentifier").val() };

    return true;

}

The controller method looks like this:

public ActionResult RemoveAttachment(string[] fileNames, int? test, Guid? imageIdentifier) {
    //test is null (hard-coded in the javascript just to prove it wasn't really null)
    //imageIdentifier is null

}

[T. Tsonev]

Hello Sean,

That's a known issue that we've managed to fix recently. The fix will be available in the SP1 release which is scheduled for September 15th.

Apologies for the caused inconvenience!

Greetings,
Tsvetomir Tsonev
the Telerik team

[Ravi]

Hello,

We are using 2012.1.214 version and i am having the same problem with upload button. Like i am trying to upload which multiple is false and for the second upload it is calling Remove server method with params null. I want to send the filename to that method but i can't.

My code snippet is:

@(Html.Telerik().Upload()
                               .Name("attachments")
                               .Multiple(false)
                               .Async(async => async
                               .Save("SaveTempFile", "FileUpload")
                                .Remove("Remove", "FileUpload")
                               .AutoUpload(true))
                               .ClientEvents(events => events
                                       .OnLoad("OnLoad")
                                       .OnSuccess("OnSuccess")
                                       .OnRemove("OnRemove")
           ))

public JsonResult Remove(string fileName)
{
}

Client event OnRemove is calling when i click on Remove not for second upload. so how to pass fileName  param to server method. 

[T. Tsonev]

Hello,

We are not aware of such issue.

You can try the browser development tools or Fiddler to inspect the requests. You should be able to see if the file name is being sent to the server.

Regards,
Tsvetomir Tsonev
the Telerik team

[Douglas]

did you ever figure this out?

I am having the same problem:

http://www.telerik.com/community/forums/aspnet-mvc/upload/upload-remove-not-working.aspx 

The parameter mainImage is always null:

public ActionResult Remove(string mainImage)
    {
        var fileName = Path.GetFileName(mainImage);
        var physicalPath = Path.Combine(Server.MapPath("~/Flyers"), fileName);

        if(System.IO.File.Exists(physicalPath))
            System.IO.File.Delete(physicalPath);
        return Content("");

    }

[Douglas]

Nevermind...

I opened up Google's developer tools to look at what was being posted back on REMOVE and noticed that I failed to adhere to the implementation to which Telerik had in their code:

public ActionResult Remove(string[] fileNames)
       {
           // The parameter of the Remove action must be called "fileNames"
           foreach (var fullName in fileNames)
           {
               var fileName = Path.GetFileName(fullName);
               var physicalPath = Path.Combine(Server.MapPath("~/App_Data"), fileName);

               // TODO: Verify user permissions
               if (System.IO.File.Exists(physicalPath))
               {
                   // The files are not actually removed in this demo
                   // System.IO.File.Delete(physicalPath);
               }
           }
           // Return an empty string to signify success
           return Content("");
       }

When I changed the parameter to a string array, it worked like a charm..