Save WebCam Captured image in Directory in ASP.Net MVC

sample below is alert ok

<script type="text/javascript">
    $(function () {
        Webcam.set({
            width: 320,
            height: 240,
            image_format: 'jpeg',
            jpeg_quality: 90
        });
        Webcam.attach('#webcam');
        $("#btnCapture").click(function () {
            Webcam.snap(function (data_uri) {
                $("#imgCapture")[0].src = data_uri;
                $("#btnUpload").removeAttr("disabled");
            });
        });
        $("#btnUpload").click(function () {
            alert("upload press")

        });
    });
</script>

but not work below

<script type="text/javascript">
    $(function () {
        Webcam.set({
            width: 320,
            height: 240,
            image_format: 'jpeg',
            jpeg_quality: 90
        });
        Webcam.attach('#webcam');
        $("#btnCapture").click(function () {
            Webcam.snap(function (data_uri) {
                $("#imgCapture")[0].src = data_uri;
                $("#btnUpload").removeAttr("disabled");
            });
        });
        $("#btnUpload").click(function () {
            $.ajax({
                type: "POST",
                url: "/Home/SaveCapture",
                data: "{data: '" + "deneme test" + "'}",
                // data: "{data: '" + $("#imgCapture")[0].src + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (r) { alert("upload press"); }
            });

        });
    });
</script>