private IRasterProvider createProviderInstance()
{
if (_parameters == null)
{
throw new InvalidOperationException("Parameter values not set");
}
InMemoryRasterProvider provider = null;
string filename = _parameters["file_name"];
if (_rpoviders.ContainsKey(filename))
{
provider = _rpoviders[filename];
if (provider.Bitmap != null)
{
bool bitmapIsOk = true;
try
{
int h = provider.Bitmap.Height;
}
catch (ObjectDisposedException)
{
bitmapIsOk = false;
}
if (bitmapIsOk)
{
return(provider);
}
}
}
_rpoviders.Remove(filename);
provider = new InMemoryRasterProvider();
if (File.Exists(filename))
{
provider.Bitmap = (Bitmap)System.Drawing.Image.FromFile(_parameters["file_name"]);
_rpoviders.Add(filename, provider);
}
else
{
throw new FileNotFoundException(_parameters["file_name"]);
}
return(provider);
}
private IRasterProvider createProviderInstance()
{
if (_parameters == null)
throw new InvalidOperationException("Parameter values not set");
InMemoryRasterProvider provider = null;
string filename = _parameters["file_name"];
if(_rpoviders.ContainsKey(filename))
{
provider = _rpoviders[filename];
if(provider.Bitmap != null)
{
bool bitmapIsOk = true;
try
{
int h = provider.Bitmap.Height;
}
catch(ObjectDisposedException)
{
bitmapIsOk = false;
}
if (bitmapIsOk) return provider;
}
}
_rpoviders.Remove(filename);
provider = new InMemoryRasterProvider();
if (File.Exists(filename))
{
provider.Bitmap = (Bitmap)System.Drawing.Image.FromFile(_parameters["file_name"]);
_rpoviders.Add(filename, provider);
}
else
throw new FileNotFoundException(_parameters["file_name"]);
return provider;
}
