Hello, how can i configure the AllowedFileExtensions property to allow files having no file extension to be uploaded? For example, i want to allow .jpg and .txt, and also any file that has no extension. I have tried adding just ".", but it doesn't work.
This functionality is not supported out of the box, some custom coding is required to in order to get it work. I have prepared sample project that demonstrates a possible approach, you may find it as an attachment. I also suggest that you take a look at the following help article that explains how to apply custom validation to RadUpload.
Sincerely yours,
Genady Sergeev
the Telerik team
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