Repopulate Signature control

Thread ID:	Created:	Updated:	Platform:	Replies:
148177	Oct 9,2019 09:40 AM UTC	Oct 10,2019 09:58 AM UTC	ASP.NET Core	1

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Tags: Signature

Pete Marshall

Asked On October 9, 2019 09:40 AM UTC

Hi,

I have set up the signature control to save to a database.

Is it possible to load this back into the signature control? On a series of forms, I would like to prepopulate the control with the signature on record for the logged in user, so they can use it or redraw.

Thanks

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Ashokkumar Balasubramanian [Syncfusion]

Replied On October 10, 2019 09:58 AM UTC

Hi Pete,

Good day to you.

Signature can be saved to a specific folder through AJAX. Please refer to the below KB document on how to save signature to a folder or database.

https://www.syncfusion.com/kb/7975/how-to-save-the-signature-image-to-a-folder-in-an-application

https://www.syncfusion.com/kb/7234/how-to-store-and-retrieve-a-signature-content-in-sql-database

After saving this image, you can render the signature control pre-loaded with this image using canvas. Since you need to load the signature during rendering, we suggest you render the control using JavaScript in Core project. Please refer to the following code.

</div>

$(function () {

// declaration

$("#signature").ejSignature({ height: "400px", isResponsive: true, strokeWidth: 3, width: "600px" });

var obj = $("#signature").ejSignature("instance"); // Create object for signature control

canvas = obj._canvas[0];

context = canvas.getContext("2d");

var img = new Image;

img.src = "../Images/Signature.png"; //specify image source

context.clearRect(0, 0, canvas.width, canvas.height); // Clear specified pixel

img.onload = function () {

context.drawImage(img, 0, 0);

}

obj.refresh();

});

</script>

We have attached a sample for your reference in the following link

https://www.syncfusion.com/downloads/support/forum/148177/ze/Signature-2069872897

UG: https://help.syncfusion.com/js/signature/how-to#pre-load-signature-image

Please let us know, if you require any further assistance on this.

Regards,

Ashokkumar B.

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Repopulate Signature control

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