Question

我正在使用facebook c＃sdk开发Windows手机应用程序。我在将照片上传到Facebook墙时遇到问题。 “var imageStream = File.OpenRead（imagepath）;”行中发生异常。我在这里做错了什么？

void cameraCaptureTask_Completed(object sender, PhotoResult e)
    {
        if (e.TaskResult == TaskResult.OK)
        {
            Uri uri = new Uri(e.OriginalFileName, UriKind.RelativeOrAbsolute);
            //Code to display the photo on the page in an image control named myImage.
            WriteableBitmap bmp = PictureDecoder.DecodeJpeg(e.ChosenPhoto);

            myImage.Source = bmp;

            imageSource = this.SaveImageToLocalStorage(bmp,System.IO.Path.GetFileName(e.OriginalFileName));
        }
    }

    private string SaveImageToLocalStorage(WriteableBitmap image, string imageFileName)
    {

        if (image == null)
        {
            throw new ArgumentNullException("imageBytes");
        }
        try
        {
            var isoFile = IsolatedStorageFile.GetUserStoreForApplication();

            if (!isoFile.DirectoryExists("MyPhotos"))
            {
                isoFile.CreateDirectory("MyPhotos");
            }

            string filePath = System.IO.Path.Combine("/" + "MyPhotos" + "/", imageFileName);
            using (var stream = isoFile.CreateFile(filePath))
            {
                image.SaveJpeg(stream, image.PixelWidth, image.PixelHeight, 0, 80);
            }

            return new Uri(filePath, UriKind.Relative).ToString();
        }
        catch (Exception)
        {
            throw;
        }
    }


    private void ApplicationBarIconButton_Click(object sender, EventArgs e)
    {
        postImage(App.AccessToken,titleBox.Text + descriptionBox.Text, imageSource);
    }

    private void postImage(string p1, string p2, string imagepath)
    {
        FacebookClient fb = new FacebookClient(p1);
        var imageStream = File.OpenRead(imagepath);
        dynamic res = fb.PostTaskAsync("/me/photos", new
        {
            message = p2,
            file = new FacebookMediaStream
            {
                ContentType = "image/jpg",
                FileName = Path.GetFileName(imagepath)
            }.SetValue(imageStream)
        });

    }

Answer 1

您不应将正斜杠（ / ）传递给Path.Combine。 Path.Combine为你增加了灵感。

string filePath = System.IO.Path.Combine("MyPhotos", imageFileName);

这将使正确的路径正确：MyPhotos / imageFileName您的原始代码出错路径：/ imageFileName

修改

在postImage()方法中，使用IsolatedStorageFile的OpenFile方法而不是File.OpenRead。

var isf = IsolatedStorageFile.GetUserStoreForApplication(); var imageStream = isf.OpenFile(imagepath, FileMode.Open);

DirectoryNotFoundException - 将照片上传到Facebook

1 个答案: