Hello Matthew,
There is a breaking change with the latest binaries
in case you have a custom upload handler. To get a param value you should
not use
this.Request.Form[paramName] and you should replaced it with
this.GetQueryParameter(paramName).
It is not OS related, but related to the latest of version of the binaries and the RadUploadHandler.dll that you are referencing in your Web project.
Please apply the change and let us know if you have any more problems with this.
The reason for the change is that now we support multiple files upload in a single request. That is why all file specific parameters are prefixed with the file index.
Please let us know how it goes!
Kind regards,
Valentin.Stoychev
the Telerik team
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