问使用asp.net 4.0 ajax将图像保存到Sql Server数据库表中

EN

$("#storeDataAndImgBtn").bind("click", function () {
    var msg = $("#emailMsg").val();
    var from = $("#fromEmail").val();
    $.ajax({
        type: "POST",
        url: "Default.aspx/storeDataAndImg",
        data: "{\"from\":\"" + from + "\" ,\"msg\":\"" + msg + "\" ,\"value\":\" 'image should be here' \" }",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (temp) {
            alert(temp.d);
            $("#mailForm").fadeOut(function () {
                $("#overlay").fadeOut();
            });
        }
    });
    return false;
});