How to Upload Multiple Files Along with Other Form Fields, ASP.NET MVC

I believe you can do this using Uploadify. There are two options you'd want to look at. First, set auto to false to prevent selected files from immediately being loaded. Second, use the formdata option to send along your other form fields along with the payload.

You'd then call the upload method when the user submits the form, uploading each file in the queue and sending the form data all at once.

Server Side Part:

You'll probably be submitting the form to an ASPX file or ASHX handler. I prefer using an ASHX handler since they're more light-weight. Both will allow you access to the HttpContext or the HttpRequest object. First, you'll need to check context.Request.Files.Count to make sure files were posted:

if (context.Request.Files.Count > 0) // We have files uploaded
{
   var file = context.Request.Files[0]; // First file, but there could be others
   // You can call file.SaveAs() to save the file, or file.InputString to access a stream
}

Obtaining the other form fields should be just as easy:

var formfield = context.Request["MyFormField"]; // Some form field

You can also write results back to the client, such as a JSON encoded description of any resulting errors:

context.Response.Write(response); // Anything you write here gets passed in to onUploadSuccess

I think that should get you started anyway!