將處理后的圖像上傳到服務器

Question

我正在使用imageFX處理上傳的圖像，並在將其處理到服務器中之后將其保存。imageFX是一個javascript庫，它將圖像轉換為經過處理的畫布，我想做的就是拿走畫布並使用AJAX將其上傳到我的服務器中，但是我收到錯誤響應，這是我的代碼：

<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script src="Scripts/pixastic/pixastic.core.js" type="text/javascript"></script>
<script src="Scripts/pixastic/desaturate.js" type="text/javascript"></script>
<script type="text/javascript">
    $(document).ready(function () {

        $("#save").click(function () {

            var image = document.getElementById("filterimage").toDataURL("image/png");
            image = image.replace('data:image/png;base64,', '');
            alert(image);
            $.ajax({
                type: 'POST',
                url: "ImageFxExample.aspx/UploadImage",
                data: '{ "imageData" : "' + image + '" }',
                contentType: 'application/json; charset=utf-8',
                dataType: 'json',
                success: function (msg) {
                    alert('Image saved successfully !');
                },
                error: function () {
                    alert("error!!");
                }
            });
        });

    });
   </script>
 <script type="text/javascript">

     function strfilter(filter) {
         var img = document.getElementById("<%=filterimage.ClientID %>");
         Pixastic.process(img, filter);
         document.getElementById("save").style.display = "block";
     }
   </script>

標記：

    <asp:FileUpload ID="fileUpload" runat="server"   />
    <asp:Button ID="upload_btn" runat="server" onclick="upload_btn_Click" Text="upload" />
    <asp:Image ID="filterimage" runat="server" ImageUrl="" />

服務器端 ：

protected void upload_btn_Click(object sender, EventArgs e){
    string folderPath = "UploadedImage/";
    string imageName = fileUpload.FileName;
    string saveLocation = Server.MapPath(folderPath) + imageName;
    fileUpload.SaveAs(saveLocation);
    filterimage.ImageUrl = folderPath + imageName;
}

[WebMethod()]
public static void UploadImage(string imageData){
    string Path = "UploadedImage/";
    string folderPath = HttpContext.Current.Server.MapPath(Path);
    string fileNameWitPath = folderPath + DateTime.Now.ToString().Replace("/", "-").Replace(" ", "- ").Replace(":", "") + ".png";

    FileStream fs = new FileStream(fileNameWitPath, FileMode.Create);
    BinaryWriter bw = new BinaryWriter(fs);

    byte[] data = Convert.FromBase64String(imageData);

    bw.Write(data);
    bw.Close();
}

如果我在不使用上傳的情況下為filterimage放置了一個簡單的imageUrl，它就可以正常工作，但是如果我使用了上傳控件，它將無法正常工作，並且我得到了錯誤消息，請幫忙

Answer 1

我找到了正確的答案，它將圖像轉換為“ png” b4，您將其上傳

protected void upload_btn_Click(object sender, EventArgs e)
{
    string folderPath = "UploadedImage/";
    string  imageName = fileUpload.FileName;

    string saveLocation = Server.MapPath(folderPath);
    string ext = Path.GetExtension(imageName);
   string name= imageName.Replace(ext, ".png");
   saveLocation = Server.MapPath(folderPath) + name;
    fileUpload.SaveAs(saveLocation);
    filterimage.ImageUrl = folderPath + name;
}