public static BitmapImageLoadingInfo CreateDefault()
{
BitmapImageLoadingInfo result = new BitmapImageLoadingInfo();
result.Image = new BitmapImage();
result.Loaded = false;
result.Loading = false;
return result;
}
public static BitmapImageLoadingInfo CreateDefault()
{
BitmapImageLoadingInfo result = new BitmapImageLoadingInfo();
result.Image = new BitmapImage();
result.Loaded = false;
result.Loading = false;
return(result);
}
public async void LoadImage()
{
string file = ImageFileName;
if (string.IsNullOrWhiteSpace(file))
{
return;
}
string imagePath = $"{Global.AppDataPath}{Path.DirectorySeparatorChar}{Global.ImagesCacheDirectory}{Path.DirectorySeparatorChar}{file}";
if (!Global.CachedImages.ContainsKey(file))
{
Global.CachedImages.Add(file, BitmapImageLoadingInfo.CreateDefault());
}
BitmapImageLoadingInfo info = Global.CachedImages[file];
if (info.Loaded)
{
this.Image = info.Image;
}
if (info.Loading)
{
await Task.Run(async() =>
{
// ugly hack to test wheter image is loaded,
// assigment of Image.Source before BitmapImage has been loaded causes NullReferenceException in BitmapImage.EndInit()
while (info.Loading)
{
await Task.Delay(100);
}
});
this.Image = info.Image;
}
if (info.Loaded || info.Loading)
{
return;
}
info.Loading = true;
if (File.Exists(imagePath))
{
byte[] imageData = File.ReadAllBytes(imagePath);
MemoryStream stream = new MemoryStream(imageData);
info.Image.BeginInit();
info.Image.CacheOption = BitmapCacheOption.OnLoad;
info.Image.StreamSource = stream;
info.Image.EndInit();
this.Image = info.Image;
info.Loaded = true;
}
else
{
MemoryStream memory = new MemoryStream();
bool success = await Task.Run <bool>(() =>
{
Stream stream = null;
if (IsContextValid && !m_context.OnlyContext)
{
stream = m_context.GetManufacturerImageStream();
}
else if (!Custom && !string.IsNullOrWhiteSpace(ManufacturerImageLink))
{
try
{
HttpWebRequest request = Requests.CreateDefaultRequest(ManufacturerImageLink);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
stream = response.GetResponseStream();
}
catch
{
stream = null;
}
}
if (stream != null)
{
FileStream fileStream = new FileStream(imagePath, FileMode.Create);
try
{
byte[] buffer = new byte[1024];
int len;
while ((len = stream.Read(buffer, 0, buffer.Length)) > 0)
{
memory.Write(buffer, 0, len);
fileStream.Write(buffer, 0, len);
}
}
finally
{
stream.Close();
fileStream.Close();
}
return(true);
}
return(false);
});
if (success)
{
memory.Seek(0, SeekOrigin.Begin);
info.Image.BeginInit();
info.Image.CacheOption = BitmapCacheOption.OnLoad;
info.Image.StreamSource = memory;
info.Image.EndInit();
this.Image = info.Image;
info.Loaded = true;
}
}
info.Loading = false;
}
