// use this method to request an image from a file and to store it in the cache
public void requestImageFromFile(String _fileName, delegate_OnReqestImageDone _sink)
{
try
{
String imageId = _fileName;
// if image is already in cache, we immediately notify the sinks
if (this.existsImage(_fileName))
{
if (_sink != null)
{
((delegate_OnReqestImageDone)_sink)(_fileName);
}
}
else
{
this.addImage(imageId, Image.FromFile(_fileName));
if (_sink != null)
{
((delegate_OnReqestImageDone)_sink)(_fileName);
}
}
}
catch (Exception e)
{
this.writeLog(LogType.Error, String.Format("Fehler bei 'requestImageFromFile' für Datei '{0}'", _fileName), e);
}
}
// use this method to request an image from an url and to store it in the cache
public void requestImageFromUrl(String _imageUrl, delegate_OnReqestImageDone _sink)
{
try
{
// if image is already in cache, we immediately notify the sinks
// otherwise start web request for url
if (this.existsImage(_imageUrl))
{
if (_sink != null)
{
((delegate_OnReqestImageDone)_sink)(_imageUrl);
}
}
else
{
lock (imageUrlOnRequest)
{
if (!imageUrlOnRequest.ContainsKey(_imageUrl))
{
imageUrlOnRequest.Add(_imageUrl, new List <delegate_OnReqestImageDone>());
webRequestHelper.httpPostRequestAsync(_imageUrl, null, null, (response) => requestImageFromUrlSink(response, _sink, _imageUrl));
}
else
{
imageUrlOnRequest[_imageUrl].Add(_sink);
}
}
}
}
catch (Exception e)
{
this.writeLog(LogType.Error, String.Format("Fehler bei 'requestImageFromUrl' für Url '{0}'", _imageUrl), e);
}
}
// this method is called if a reqestImageFromUrl action has retrieved the data
protected virtual void requestImageFromUrlSink(HttpWebResponse _reponse, delegate_OnReqestImageDone _sink, String _imageId)
{
try
{
String imageId = _imageId;
Stream stream = _reponse.GetResponseStream();
if (stream == null)
{
return;
}
this.addImage(imageId, Image.FromStream(stream));
if (_sink != null)
{
((delegate_OnReqestImageDone)_sink)(imageId);
}
}
catch (Exception e)
{
this.writeLog(LogType.Error, String.Format("Fehler bei 'requestImageFromUrlSink' für Url '{0}'", _reponse.ResponseUri.AbsoluteUri), e);
}
lock (imageUrlOnRequest)
{
if (imageUrlOnRequest.ContainsKey(_imageId))
{
foreach (var delegateLink in imageUrlOnRequest[_imageId])
{
if (delegateLink != null)
{
((delegate_OnReqestImageDone)delegateLink)(_imageId);
}
}
imageUrlOnRequest.Remove(_imageId);
}
}
}
// this method is called if a reqestImageFromUrl action has retrieved the data
protected virtual void requestImageFromUrlSink(HttpWebResponse _reponse, delegate_OnReqestImageDone _sink, String _imageId)
{
try
{
String imageId = _imageId;
Stream stream = _reponse.GetResponseStream();
if (stream == null)
return;
this.addImage(imageId, Image.FromStream(stream));
if (_sink != null) ((delegate_OnReqestImageDone)_sink)(imageId);
}
catch(Exception e)
{
this.writeLog(LogType.Error, String.Format("Fehler bei 'requestImageFromUrlSink' für Url '{0}'", _reponse.ResponseUri.AbsoluteUri), e);
}
lock (imageUrlOnRequest)
{
if (imageUrlOnRequest.ContainsKey(_imageId))
{
foreach(var delegateLink in imageUrlOnRequest[_imageId])
{
if (delegateLink != null) ((delegate_OnReqestImageDone)delegateLink)(_imageId);
}
imageUrlOnRequest.Remove(_imageId);
}
}
}
// use this method to request an image from an url and to store it in the cache
public void requestImageFromUrl(String _imageUrl, delegate_OnReqestImageDone _sink)
{
try
{
// if image is already in cache, we immediately notify the sinks
// otherwise start web request for url
if (this.existsImage(_imageUrl))
{
if (_sink != null) ((delegate_OnReqestImageDone)_sink)(_imageUrl);
}
else
{
lock (imageUrlOnRequest)
{
if (!imageUrlOnRequest.ContainsKey(_imageUrl))
{
imageUrlOnRequest.Add(_imageUrl, new List<delegate_OnReqestImageDone>());
webRequestHelper.httpPostRequestAsync(_imageUrl, null, null, (response) => requestImageFromUrlSink(response, _sink, _imageUrl));
}
else
{
imageUrlOnRequest[_imageUrl].Add(_sink);
}
}
}
}
catch (Exception e)
{
this.writeLog(LogType.Error, String.Format("Fehler bei 'requestImageFromUrl' für Url '{0}'", _imageUrl), e);
}
}
// use this method to request an image from a file and to store it in the cache
public void requestImageFromFile(String _fileName, delegate_OnReqestImageDone _sink)
{
try
{
String imageId = _fileName;
// if image is already in cache, we immediately notify the sinks
if (this.existsImage(_fileName))
{
if (_sink != null) ((delegate_OnReqestImageDone)_sink)(_fileName);
}
else
{
this.addImage(imageId, Image.FromFile(_fileName));
if (_sink != null) ((delegate_OnReqestImageDone)_sink)(_fileName);
}
}
catch (Exception e)
{
this.writeLog(LogType.Error, String.Format("Fehler bei 'requestImageFromFile' für Datei '{0}'", _fileName),e);
}
}
