无法在ajax调用中调试ASPX中的WebMethod

时间:2014-04-16 07:46:42

标签: c# jquery asp.net ajax firebug

我正在尝试使用AJAX调用和POST方法将通过html2canvas完成的屏幕截图发送到服务器,但它没有发生。当我尝试通过在相关行设置断点来使用Firebug调试脚本时,我的应用程序没有到达断点。

这是我的客户端代码(使用jQuery):

$("#excel").on("click", function (e) {
        e.preventDefault();

        html2canvas($("#placeholder").get(0), {
            onrendered: function (canvas) {
                //document.body.appendChild(canvas);

                var img = canvas.toDataURL().replace(/^data[:]image\/(png|jpg|jpeg)[;]base64,/i, "");
                $.ajax({
                    "type": "POST",
                    "url": "Default.aspx/MyMethod",
                    "data": {
                        "imageData": img //Send to WebMethod
                    }
                }).done(function (o) {
                    console.log(["Response:", o]);
                });

            }
    });

这是我的服务器端ASPX WebMethod:

 [WebMethod()]
public static void MyMethod(string imageData)
{

    string fileNameWitPath = "D:/Kabir/custom_name.png";
    using (FileStream fs = new FileStream(fileNameWitPath, FileMode.Create))
    {
        using (BinaryWriter bw = new BinaryWriter(fs))
        {
            byte[] data = Convert.FromBase64String(imageData);//convert from base64
            bw.Write(data);
            bw.Close();
        }
    }

当我尝试在Firebug中看到它时,它的状态为200 OK。为什么会这样?

2 个答案:

答案 0 :(得分:0)

你有无效的JSON:

                "type": "POST",
                "url": "Default.aspx/MyMethod",
                "data": {
                    "imageData": img //Send to WebMethod
                }

问题在于您的画布数据,请使用此选项。并只需替换var img =“image”;变量作为您的愿望输入

$(document).ready(function () {
            $("#excel").on("click", function (e) {
                e.preventDefault();
                //document.body.appendChild(canvas);
                var img = "image";
                $.ajax({
                    type: "POST",
                    url: "Default.aspx/MyMethod",
                    data: JSON.stringify({ imageData: img }),
                    contentType: "application/json; charset=utf-8"
                }).done(function (o) {
                    console.log(["Response:", o]);
                });


            });
        });

答案 1 :(得分:0)

在您的客户端

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#excel").on("click", function (e) {
                e.preventDefault();
                //document.body.appendChild(canvas);
                var img = "image";
                $.ajax({
                    type: "POST",
                    url: "Default.aspx/MyMethod",
                    data: JSON.stringify({ imageData: img }),
                    contentType: "application/json; charset=utf-8"
                }).done(function (o) {
                    console.log(["Response:", o]);
                });
            });
        });
    </script>
    <input type="button" id="excel" title="something" />

关于代码

 [WebMethod()]
        public static void MyMethod(string imageData)
        {

            string fileNameWitPath = "D:/Kabir/custom_name.png";
            using (FileStream fs = new FileStream(fileNameWitPath, FileMode.Create))
            {
                using (BinaryWriter bw = new BinaryWriter(fs))
                {
                    byte[] data = Convert.FromBase64String(imageData);//convert from base64
                    bw.Write(data);
                    bw.Close();
                }
            }
        }