使用c将地图保存到地铁应用程序中的图像＃

我正在用c＃和XAML开发Metro应用程序。使用c将地图保存到地铁应用程序中的图像＃

在我的应用程序，我需要在静态地图保存成图像像是从位置（经度，纬度）：http://dev.virtualearth.net/REST/v1/Imagery/Map/Road/47.619048,-122.35384/15?mapSize=500,500&key=BINGKEY

我已经发送的HTTPRequest到尝试过很多方法可以从它创建一个图像网址，但都是徒劳的。

例如：

HttpWebRequest httpWebRequest = (HttpWebRequest)result.AsyncState; 
      WebResponse response = httpWebRequest.EndGetResponse(result); 

      // Retrieve the reponse data. 
      Stream responseStream = response.GetResponseStream(); 


      StreamReader reader = new StreamReader(responseStream, Encoding.UTF8); 
      string xml = reader.ReadToEnd(); 

      System.Text.Encoding enc = System.Text.Encoding.UTF8; 
      Clsses.Common.Instance.imageBytes = enc.GetBytes(xml); 

      Stream stream = new MemoryStream(Clsses.Common.Instance.imageBytes); 

      InMemoryRandomAccessStream randomAccessStream = new InMemoryRandomAccessStream(); 
      DataWriter writer = new DataWriter(randomAccessStream.GetOutputStreamAt(0)); 

      writer.WriteBytes(Clsses.Common.Instance.imageBytes); 
      var result1 = await writer.StoreAsync(); 

      WriteableBitmap wb = new WriteableBitmapresult1 1); 
      MemoryStream ms = new MemoryStream(); 
      using (IRandomAccessStream writeStream = await sampleFile1.OpenAsync(FileAccessMode.ReadWrite)) 
      { 
       BitmapEncoder encoder = await BitmapEncoder.CreateAsync(new Guid(), writeStream); 
       encoder.SetPixelData(BitmapPixelFormat.Rgba8, BitmapAlphaMode.Premultiplied, (uint)wb.PixelWidth, (uint)wb.PixelHeight, 96, 96, Clsses.Common.Instance.imageBytes); 
       await encoder.FlushAsync(); 
      }

请帮我把它保存为图像对象。

来源

2012-04-19 Mandeep Kaur

以上URL的输出是图片吗？ – Shoban 2012-04-19 06:28:55

是的输出是一个JPEG图像 – 2012-04-19 06:31:22

我还没有尝试过，但你可以使用相同的技术，你可以在WP7使用WritableBitmap http://stackoverflow.com/questions/6299978/uielement-to-image-file-wp7 – Shoban 2012-04-19 06:33:08

public async Task<StorageFile> GetBingMapImage(string ImageUrl) 
{ 
    StorageFile storageFile = null; 
    HttpClient httpClient = new HttpClient(); 
    HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, ImageUrl); 
    HttpResponseMessage httpResponseMessage = await httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead); 
    if (httpResponseMessage.StatusCode == System.Net.HttpStatusCode.OK) 
    { 
     var fileSavePicker = new FileSavePicker(); 
     fileSavePicker.FileTypeChoices.Add("png", new List<string> { ".png" }); 
     fileSavePicker.SuggestedFileName = "map.png"; 
     fileSavePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; 
     storageFile = await fileSavePicker.PickSaveFileAsync(); 

     if (storageFile != null) 
     { 
      IRandomAccessStream randomAccessStream = await storageFile.OpenAsync(FileAccessMode.ReadWrite); 
      DataWriter dataWriter = new DataWriter(randomAccessStream.GetOutputStreamAt(0uL)); 
      var bytes = await httpResponseMessage.Content.ReadAsByteArrayAsync(); 
      dataWriter.WriteBytes(bytes); 
      await dataWriter.StoreAsync(); 
      await dataWriter.FlushAsync(); 
      await randomAccessStream.FlushAsync(); 
      dataWriter.Dispose(); 
      randomAccessStream.Dispose(); 
     } 
    } 
    return storageFile; 
}

来源

2013-03-26 10:10:13 Xyroid

使用c将地图保存到地铁应用程序中的图像＃

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