Want to implement the functions uploaded by the Multiple files, click a button to add a file to the box, which is previously seen on the network hard disk. JavaScript I know how to achieve any additional file controls, the problem is to add HTML controls, I don't know how to get the server to get the file. So the Google search "ASP.NET Multi-File Upload", I really found a file, the title "Upload" in ASP.NET ", the article is VB.NET implementation, the function is exactly the same," I mainly want to see how the server is getting uploaded by the client. I read the code in the article. It turns out as simple, System.Web.httpContext.current.Request.Files contains the file uploaded by the client browser, I use C # I wrote a simple code, I originally thought it should, and the result is unexpected to upload 3 pictures system.web.httpContext.current.Request.Files returned file format or 0. I don't know why, look at the code, I can't make a bit wrong, then look at another article in Google search results, I found that the first one of my see is not original, the author's website has two instances A version, one is VB.Net one is C #, now I don't have to write it yourself, copy the original code to the local, run, really, how can I write the code? Repeatedly compares the difference between my code and the code in the article, I tried a few places, and I finally found that there is no relationship with other places. The reason is in the
