Is there a way to upload a file without reloading the page and without using JS?

You cannot do Ajax file uploads. They're not supported.May HTML5 support this I am not sure.

 I recommend using the Fine Uploader plugin.You can use also

• Ajax File Upload Plugin
• Multiple File Upload Plugin

you can use HTML5 upload process for that particular step, or set your upload page target to blank page (Pop-up) to avoid full page reload.

You have to have some way to execute code.
If you do not want JavaScript then you may explore Flash, Siverlight, or Java Applets.

HTML5 , otherwise go with AJAX (which you dont want to)!!

You can use hidden iframe and make form target to that.

Yes a simple jquery plugin: http://blueimp.github.io/jQuery-File-Upload/

var AjaxFileUploader = function () {

    this._file = null;

    var self = this;

 

    this.uploadFile = function (uploadUrl, file) {

        var xhr = new XMLHttpRequest();

        xhr.onprogress = function (e) {

            ...

        };

 

        xhr.onload = function (e) {

            ...

        };

 

        xhr.onerror = function (e) {

            ...

        };

 

        xhr.open("post", uploadUrl, true);

 

        xhr.setRequestHeader("Content-Type", "multipart/form-data");

        xhr.setRequestHeader("X-File-Name", file.name);

        xhr.setRequestHeader("X-File-Size", file.size);

        xhr.setRequestHeader("X-File-Type", file.type);

 

        xhr.send(file);

    };

};

 

AjaxFileUploader.IsAsyncFileUploadSupported = function () {

    return typeof (new XMLHttpRequest().upload) !== 'undefined';

}

 

 if (AjaxFileUploader.IsAsyncFileUploadSupported) {

        ajaxFileUploader = new AjaxFileUploader();

 

        $("form").submit(function () {

            var uploader = $("#fileUploader")[0];

 

            if (uploader.files.length ==0) {

                return;

            } else {

                ajaxFileUploader.uploadFile(

                    "/YourUploadUrl",

                    uploader.files[0]);

            }

 

            return false;

        });

    }

 

source: http://stackoverflow.com/questions//ajax-file-upload-form-submit-without-jquery-or-iframes

You said with out reloading. if that is the case then a normal submit button would do the job. If that is not the intended question, then as Mr.Daanish Rumani had said you can use flash or some other alternative. But in the end a http request header has to be generated for communicating with the server. 

read about uploading using iframe.