Question

我需要使用phonegaps Camera和File Transfer API将图像上传到网络服务。

例如，在Webservice上有：

[WebMethod]
        [ScriptMethod(UseHttpGet = true)]
        public string SaveImage(string imageData, string filename)
        {

            string success = "Nothing";

            try
            {
                string filename = "text.png";
                if (!System.IO.Directory.Exists(HttpContext.Current.Server.MapPath("~/devimg")))
                {
                    System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath("~/devimg/"));
                }

                string path = HttpContext.Current.Server.MapPath("~/devimg/").ToString();

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

                using (var imgStream = new MemoryStream(imgByte, true))
                {
                    Bitmap img = new Bitmap(imgStream);

                    Image i = (Image)img;
                    i.Save(path + "" + filename, ImageFormat.Png);
                    success = "Image created!!";

                }
            }
            catch (Exception e)
            {
                success = e.ToString();
            }

            return success;
        }

并在应用中有：

navigator.camera.getPicture( function( imgdata ){
    //Base 64 encoded image file or whatever
}, CameraError , {
    quality: 50,
    destinationType: navigator.camera.DestinationType.DATA_URL,
    sourceType: navigator.camera.PictureSourceType.CAMERA,
    encodingType: navigator.camera.EncodingType.JPEG,
    saveToPhotoAlbum: true
});

当前的web服务允许将Base 64编码的图像传递到它中，然后创建图像并使用给定的文件名保存它。但是，如果我尝试从phonegap应用程序访问web服务，它就无法工作。

我试图通过ajax访问webservice，但只是一堆错误。有没有更好的方法将图像上传到服务器？

Answer 1

由于我无法选择评论作为答案，以下是我的代码以供将来参考： Phonegap JS：

navigator.camera.getPicture( function( imgdata ){
 var urlimg = "http:// *URL ADDRESS* /mobile.asmx/SaveImage";

 var params = new Object();
 params.otherinfo = "Whaterver"
 var options = new FileUploadOptions();
 options.fileKey = "file";
 options.fileName = imgdata.substr(imgdata.lastIndexOf('/')+1);
 options.mimeType = "image/jpeg";
 options.params = params;
 options.chunkedMode = false;

var ft = new FileTransfer();
 setTimeout(function() {
  ft.upload(imgdata, urlimg, function(){
   alert("Success")
  }, function(err){
  alert("Error: " + JSON.stringify(err));
  }, options );
 }, 600);

}, function(err){
 alert(err);
} , {
 quality: 50,
 destinationType: navigator.camera.DestinationType.FILE_URI,
 sourceType: navigator.camera.PictureSourceType.CAMERA,
 encodingType: navigator.camera.EncodingType.JPEG,
 saveToPhotoAlbum: true
});

<强>的WebService

[WebMethod]     
public void SaveImage()
{
 if (!System.IO.Directory.Exists(HttpContext.Current.Server.MapPath("~/devimg"))){
  System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath("~/devimg/"));
 }

string path = HttpContext.Current.Server.MapPath("~/devimg/").ToString();

var Request = HttpContext.Current.Request;
if (Request.Files.Count > 0){
 var file = Request.Files[0];
 file.SaveAs( path + file.FileName);
 }
}

Answer 2

见here。有关设置文件参数和调用Web服务的详细信息。

Phonegap Filetransfer将图像上传到Webservice

2 个答案: