How to save the Signature image to a folder in an application?

2 mins read

Description

The Signature control by default records the drawn signature in Base64 string format for later regeneration. Hence, we can use this to store in folder in your application.

Solution

To store the drawn signature image in the application folder, follow the steps below:

Initially convert the signature value to the Base64 string value by using the canvas toDataURL() method and then pass it to controller action by using jQuery AJAX post.
Specify the file name and path to save the signature using FileStream.
Convert the image’s Base64 string value to the image using BinaryWriter.

The following code explains how to store signature image to a folder in an 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();
 
        }

The below is the screenshot of the image stored in the folder by using the above codes