I have a asp.net vb.net app, with a upload file control, when i upload the file i can get the type of file the extension : .(extension), But if the user change the extension how i can get the re开发者_JAVA技巧al type of file?
Any ideas??
You should analyse the header contents of the uploaded data.
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......
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