Multi file upload using c# on ASP.NET 4.0 environment

Question

I am looking for a solution to upload multiple files (click on browse button, and select multiple files using shift key).

I see several solutions that need to be upl

Answer 1

We have been using the below jQuery plugin to help us.

jQuery Multiple File Upload Plugin

After including the necessary js file : jQuery.multifile.pack.js, we can use it like below.

Giving class="multi" makes it to accept more than one file.

You can also apply the constraints if you want. Like class = "max-3" would allow maximum three files to be uploaded. class = "accept-gif|jpg" would only allow files with gif OR jpg extensions to be uploaded.

For getting the multiple files on the sever side you will need to include the namespace : System.Web;

Then you can have the below code for iterating through each file uploaded.

if (Request.Files.Count > 0)
{
    HttpFileCollection attachments = Request.Files;
    for (int i = 0; i < attachments.Count; i++)
    {
        HttpPostedFile attachment = attachments[i];
        if (attachment.ContentLength > 0 && !String.IsNullOrEmpty(attachment.FileName))
        {
            //do your file saving or any related tasks here.
        }
    }
}

This would be regardless of .net framework version.