How to save the signature image to a folder in .NET WebForms application?

 
 
    <div class="frame">
           @Html.EJ().Signature("mysign").Height("400px").StrokeWidth(3).IsResponsive(true)
 
        <input type="button" id="btnSave" name="btnSave" value="Save" />
    </div>
 
<script>
 
 
    $(function () {
 
// function on button click to convert the image to Base64 string value and then passing it to the server side
 
        $("#btnSave").click(function () {
 
 
            var div = $("#mysign");
            var canvas = div["children"]()[0]; 
            image = canvas.toDataURL("image/png");
            newimage = image.replace('data:image/png;base64,', '');
 
            $.ajax({
                type: 'POST',
                url: '@Url.Action("SignatureSave", "Signature")',
                data: {
                    imageData: newimage
                },
 
                success: function (data) {
                    alert("success" );
                }
            });
        });
    });
 
</script>
 
 

 
// method to get the signature content and then store in a folder
 
 
              static string path = @"C:\Users\David\Desktop\SignatureMVC\App_Data\"; // give your folder in the application for storing
 
 
        [HttpPost]
 
        public ActionResult SignatureSave(string imageData)
        {
 
            string fileNameWitPath = path + DateTime.Now.ToString().Replace("/", "-").Replace(" ", "- ").Replace(":", "") + ".png";
 
            using (FileStream fs = new FileStream(fileNameWitPath, FileMode.Create))
            {
                using (BinaryWriter bw = new BinaryWriter(fs))
                {
 
                    byte[] data = Convert.FromBase64String(imageData);
 
                    bw.Write(data);
 
                    bw.Close();
                }
 
            }
            return View();
 
        }