var formData = new FormData(this);
            debugger;
            $.ajax({
                url: formURL,
                type: 'POST',
                data: formData,
                mimeType: "multipart/form-data",
                contentType: false,
                cache: false,
                processData: false,
                success: function (data, textStatus, jqXHR) {
                    debugger;
                    

                },
                error: function (jqXHR, textStatus, errorThrown) {
                    
 
                }
            });

The above code will help you post content plus files in one submit call.

The post method parameter should include HttpPostedFileBase[] file so the list of files will appear in this file parameter

var formData = new FormData(this);
debugger;
$.ajax({
  url: formURL,
  type: 'POST',
  data: formData,
  mimeType: "multipart/form-data",
  contentType: false,
  cache: false,
  processData: false,
  success: function (data, textStatus, jqXHR) {
    debugger;
  },
  error: function (jqXHR, textStatus, errorThrown) {
                    
  }
});

The above code will help you post content plus files in one submit call.

The post method parameter should include HttpPostedFileBase[] file so the list of files will appear in this file parameter