windows phone 7 - System.IO.File does not contain ReadAllByt

本文关键字：does not contain ReadAllByt File IO phone System windows | 更新日期: 2023-09-27 18:00:29

在C#中，我正在为WP7创建一个简单的facebook应用程序，但遇到了一个问题。

我正在尝试在相册或提要中上传图片。

代码：

FacebookMediaObject facebookUploader = new FacebookMediaObject { FileName = "SplashScreenImage.jpg", ContentType = "image/jpg" };
var bytes = System.IO.File.ReadAllBytes(Server.MapPath("~") + facebookUploader.FileName);
facebookUploader.SetValue(bytes);

错误：

  • System.IO.File不包含ReadAllBytes的定义

windows phone 7 - System.IO.File does not contain ReadAllByt

您遇到了几个问题。首先，Server.MapPath不会为您提供文件位置（因为您不在web应用程序中）。但是，一旦您知道了要查找的文件路径（在IsolatedStorage中），就可以执行类似的操作，将文件读取为字节数组：

    public byte[] ReadFile(String fileName)
    {
        byte[] bytes;
        using (IsolatedStorageFile appStorage = IsolatedStorageFile.GetUserStoreForApplication())
        {
            using (IsolatedStorageFileStream file = appStorage.OpenFile(fileName, FileMode.Open, FileAccess.Read))
            {
                bytes = new byte[file.Length];
                var count = 1024;
                var read = file.Read(bytes, 0, count);
                var blocks = 1;
                while(read > 0)
                {
                    read = file.Read(bytes, blocks * count, count); 
                    blocks += 1;
                }
            }
        }
        return bytes;
    }

我找到了一个解决方案。

代码：

string imageName = boxPostImage.Text;
StreamResourceInfo sri = null;
Uri jpegUri = new Uri(imageName, UriKind.Relative);
sri = Application.GetResourceStream(jpegUri);
try
{
    byte[] imageData = new byte[sri.Stream.Length];
    sri.Stream.Read(imageData, 0, System.Convert.ToInt32(sri.Stream.Length));
    FacebookMediaObject fbUpload = new FacebookMediaObject
    {
         FileName = imageName,
         ContentType = "image/jpg"
    };
    fbUpload.SetValue(imageData);

    IDictionary<string, object> parameters = new Dictionary<string, object>();
    parameters.Add("access_token", _AccessToken);
    parameters.Add("source", fbUpload);
    //_fbClient.PostAsync("/"+MainPage._albumId+"/photos", parameters);
    _fbClient.PostAsync("/me/photos", parameters);

    MessageBox.Show("Image has been posted successfully..");
}
catch (Exception error)
{
    MessageBox.Show("Sorry, there's an error occured, please try again.");
}
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