Validation on Video size? (regular expression?)

In my web application while uploading a video file i restrict the user to upload up to 10 mb not more than 10 Mb, i write code for this, but can i get regular exp开发者_运维问答ression for size of the video, when user upload the video in fileupload control. Thank you.

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long numBytes = this.FileUpload1.FileBytes.Length;
double dLen = Convert.ToDouble(numBytes / 1000000);

dLen will be the size in MB.

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You could do this in ASP.NET but it's better to check locally with JavaScript as well to avoid wasting bandwidth. The file selector input box has some file-related properties, such as this one that you can check to see it's under 10MiB before uploading.

fileInput.files[0].size;

So, your check would be:

if (fileInput.files[0].size > 10485760) ...