private Image LoadImage(string imageExpression)
{
try
{
using (IDataValue imageData = FrontendSession.Pipe.RequestDocument(imageExpression))
{
var streamCopy = new MemoryStream();
Stream stream = imageData.OpenStream();
try
{
StreamUtility.CopyStream(stream, streamCopy);
}
finally
{
stream.Close();
}
return(Image.FromStream(streamCopy));
}
}
catch (Exception exception)
{
Dataphoria.Warnings.AppendError(this, exception, true);
// Don't rethrow
}
return(null);
}
public override object InternalExecute(Program program, object[] arguments)
{
IDataValue tempValue = arguments[0] as IDataValue;
if (tempValue == null)
{
tempValue = DataValue.FromNative(program.ValueManager, arguments[0]);
}
if (tempValue.IsPhysicalStreaming)
{
using (Stream stream = tempValue.OpenStream())
{
return((int)CRC32Utility.GetCRC32(stream));
}
}
else
{
byte[] physical = new byte[tempValue.GetPhysicalSize(true)];
tempValue.WriteToPhysical(physical, 0, true);
return((int)CRC32Utility.GetCRC32(physical));
}
}
