ASP.NET FileUpload doesn’t work

So you added a FileUpload control in order to receive files from your clients. The problem? HasFile() returns false every time you send a file.

Reason of this problem is described in HTML specification. Basically, if the forms sent by your page will contain file data, multipart/form-data should be used.

To use it in ASP.NET we just need to specify following line in our code:

Page.Form.EncType = "multipart/form-data"

I am not 100% sure but I haven’t heard about a rule that forces you to use the above code in load, init, prerender or any other place. If you know more about this, feel free to write a comment.

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