Required validation for signature

[harikrishna149]

Hi,

I am working with jSignature in my application using asp.net mvc angularjs. I want to do vallidate this signature as required. I tried using getdata method when canvas is empty and i get the signature length is 2430. how can i validate the signature. please help me asap.

Code: $scope.saveSignature = function () { var data = $("#signature").jSignature("getData"); alert(data.length); $scope.SignData = sig.jSignature('getData'); }

I want to validate the signature in saveSignature function. Please help me

[brinley]

Try using ismodified to check if the canvas has any content

[harikrishna149]

Hi Brinley,

isModified method is working fine when cavas has no content. but how can we validate the signature using isModidied and getdata length?.

I am using both the methods and i am getting some length of canvas conent. how to validate that canvas content length?

Thanks, Harikrishna

[brinley]

getData on a canvas will always return data even for a blank canvas. Perhaps you can save the data for your blank canvas and use that to compare if there is any content.

[peerles]

Why not use the method like this: '$sigdiv.jSignature('getData', 'native').length'? if the length is 0, then the canvas has no content, else the canvas has any content and the lenth is eauals to the number of strokes