2
我想上傳一張圖片Twitter的的PhotoChooserTask捕捉他。我遇到的問題是我不知道如何通過BitmapImage，這是我選擇圖像並將其傳遞給Stream時的格式。TweetSharp上傳圖像與PhotoChooserTask和SendTweetWithMedia
下面是我的代碼示例：
namespace Twitter
{
public partial class TwitterUploadImage : PhoneApplicationPage
{
// Constructor
TwitterService service;
private const string consumerKey = "";
private const string consumerSecret = "";
private OAuthRequestToken requestToken;
private OAuthAccessToken accesToken;
private bool userAuthenticated = false;
//Uri uri = new Uri("/Background.png", UriKind.Relative);
//Stream imageStream = Application.GetResourceStream(uri);
Stream imageStream;
string namePhoto;
public TwitterUploadImage()
{
InitializeComponent();
service = new TwitterService(consumerKey,consumerSecret);
//Chek if we already have the Autehntification data
var token = getAccessToken();
if (token != null)
{
service.AuthenticateWith(token.Token, token.TokenSecret);
userAuthenticated = true;
}
}
//protected override void OnNavigatedTo(NavigationEventArgs e)
//{
// // Get a dictionary of query string keys and values.
// IDictionary<string, string> queryStrings = this.NavigationContext.QueryString;
// // Ensure that there is at least one key in the query string, and check whether the "FileId" key is present.
// if (queryStrings.ContainsKey("FileId"))
// {
// // Retrieve the photo from the media library using the FileID passed to the app.
// MediaLibrary library = new MediaLibrary();
// Picture photoFromLibrary = library.GetPictureFromToken(queryStrings["FileId"]);
// // Create a BitmapImage object and add set it as the image control source.
// // To retrieve a full-resolution image, use the GetImage() method instead.
// BitmapImage bitmapFromPhoto = new BitmapImage();
// bitmapFromPhoto.SetSource(photoFromLibrary.GetPreviewImage());
// image1.Source = bitmapFromPhoto;
// }
//}
private void tweetClick(object sender, RoutedEventArgs e)
{
if (userAuthenticated)
Tweet(Message.Text, imageStream);
else
service.GetRequestToken(processRequestToken);
}
private void processRequestToken(OAuthRequestToken token, TwitterResponse response)
{
if (token == null)
Dispatcher.BeginInvoke(() => { MessageBox.Show("Error obtaining Request token"); });
else
{
requestToken = token;
Dispatcher.BeginInvoke(() =>
{
Browser.Visibility = System.Windows.Visibility.Visible;
Browser.Navigate(service.GetAuthorizationUri(requestToken));
});
}
}
private void processAccessToken(OAuthAccessToken token, TwitterResponse response)
{
if (token == null)
Dispatcher.BeginInvoke(() => { MessageBox.Show("Error obtaining Access token"); });
else
{
accesToken = token;
service.AuthenticateWith(token.Token, token.TokenSecret);
saveAccessToken(token);
userAuthenticated = true;
Dispatcher.BeginInvoke(() =>
{
Tweet(Message.Text, imageStream);
});
}
}
private void Tweet(string message, Stream ImageStream)
{
//SendTweetOptions msg = new SendTweetOptions();
//msg.Status = message;
//service.SendTweet(msg, tweetResponse);
//MediaLibrary library = new MediaLibrary();
//Picture picture = library.GetPictureFromToken(namePhoto);
////Stream stream = picture.ToString;
//var stream = library.GetPictureFromToken(namePhoto);
PhotoChooserTask photoChooserTask = new PhotoChooserTask();
photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChooserTask_Completed);
photoChooserTask.Show();
SendTweetWithMediaOptions msgMedia = new SendTweetWithMediaOptions();
msgMedia.Status = message;
Dictionary<string, Stream> imageDict = new Dictionary<string, Stream> { { "test", imageStream } };
//imageDict.Add(imagePath, imageStream);
msgMedia.Images = imageDict;
//status = service.SendTweetWithMedia(new SendTweetWithMediaOptions() { Status = readerMsg.Message, Images = imageDict });
service.SendTweetWithMedia(msgMedia, tweetResponse);
////var service = GetAuthenticatedService();
//using (var stream = new FileStream("daniel_8bit.png", FileMode.Open))
//{
// var tweet = service.SendTweetWithMedia(new SendTweetWithMediaOptions
// {
// Status = "Can_tweet_with_image:Tweet",
// Images = new Dictionary<string, Stream> {{"test", stream}}
// });
// //Assert.IsNotNull(tweet);
// //Assert.AreNotEqual(0, tweet.Id);
//}
//service.SendTweetWithMedia(new SendTweetWithMediaOptions
//{
// Status = "Can_tweet_with_image:Tweet",
// Images = new Dictionary<string, Stream> { { "test", imageStream } }
//});
}
private void tweetResponse(TwitterStatus tweet, TwitterResponse response)
{
if (response.StatusCode == HttpStatusCode.OK)
{
Dispatcher.BeginInvoke(() => { MessageBox.Show("Tweet posted successfully"); });
}
else
{
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
saveAccessToken(null);
userAuthenticated = false;
Dispatcher.BeginInvoke(() => { MessageBox.Show("Authentication error"); });
}
else
Dispatcher.BeginInvoke(() => { MessageBox.Show("Error, please try again later"); });
}
}
private void BrowserNavitaged(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
if (e.Uri.AbsoluteUri.Contains("oauth_verifier"))
{
var values = ParseQueryString(e.Uri.AbsoluteUri);
string verifier = values["oauth_verifier"];
service.GetAccessToken(requestToken, verifier, processAccessToken);
Dispatcher.BeginInvoke(() => { Browser.Visibility = System.Windows.Visibility.Collapsed; });
}
}
private void saveAccessToken(OAuthAccessToken token)
{
if (IsolatedStorageSettings.ApplicationSettings.Contains("accessToken"))
IsolatedStorageSettings.ApplicationSettings["accessToken"] = token;
else
IsolatedStorageSettings.ApplicationSettings.Add("accessToken", token);
IsolatedStorageSettings.ApplicationSettings.Save();
}
private OAuthAccessToken getAccessToken()
{
if (IsolatedStorageSettings.ApplicationSettings.Contains("accessToken"))
return IsolatedStorageSettings.ApplicationSettings["accessToken"] as OAuthAccessToken;
else
return null;
}
protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
{
if (Browser.Visibility == System.Windows.Visibility.Visible)
{
Browser.Visibility = System.Windows.Visibility.Collapsed;
e.Cancel = true;
}
base.OnBackKeyPress(e);
}
// From Hammock.Extensions.StringExtensions.cs
public static IDictionary<string, string> ParseQueryString(string query)
{
// [DC]: This method does not URL decode, and cannot handle decoded input
if (query.StartsWith("?")) query = query.Substring(1);
if (query.Equals(string.Empty))
{
return new Dictionary<string, string>();
}
var parts = query.Split(new[] { '&' });
return parts.Select(
part => part.Split(new[] { '=' })).ToDictionary(
pair => pair[0], pair => pair[1]
);
}
private void takepicture(object sender, RoutedEventArgs e)
{
//PhotoChooserTask photoChooserTask = new PhotoChooserTask();
//photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChooserTask_Completed);
//photoChooserTask.Show();
}
void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
var img = new BitmapImage();
img.SetSource(e.ChosenPhoto);
imageStream = img;
//namePhoto = e.OriginalFileName;
//BitmapImage image = new BitmapImage();
//image.SetSource(e.ChosenPhoto);
//this.img.Source = image;
}
}
}
}