protected override Document OnLoad(Stream input)
{
using (Image image = PdnResources.LoadImage(input))
{
Document document = Document.FromImage(image);
return(document);
}
}
public override void PerformAction(AppWorkspace appWorkspace)
{
if (!ScanningAndPrinting.CanScan)
{
Utility.ShowWiaError(appWorkspace);
return;
}
string tempName = Path.ChangeExtension(SystemLayer.FileSystem.GetTempFileName(), ".bmp");
ScanResult result;
try
{
result = ScanningAndPrinting.Scan(appWorkspace, tempName);
}
// If there was an exception, let's assume the user has already received an error dialog,
// either from Windows or from the WIA UI, and let's /not/ present another error dialog.
catch (Exception)
{
result = ScanResult.UserCancelled;
}
if (result == ScanResult.Success)
{
string errorText = null;
try
{
Image image;
try
{
image = PdnResources.LoadImage(tempName);
}
catch (FileNotFoundException)
{
errorText = PdnResources.GetString("LoadImage.Error.FileNotFoundException");
throw;
}
catch (OutOfMemoryException)
{
errorText = PdnResources.GetString("LoadImage.Error.OutOfMemoryException");
throw;
}
Document document;
try
{
document = Document.FromImage(image);
}
catch (OutOfMemoryException)
{
errorText = PdnResources.GetString("LoadImage.Error.OutOfMemoryException");
throw;
}
finally
{
image.Dispose();
image = null;
}
DocumentWorkspace dw = appWorkspace.AddNewDocumentWorkspace();
try
{
dw.Document = document;
}
catch (OutOfMemoryException)
{
errorText = PdnResources.GetString("LoadImage.Error.OutOfMemoryException");
throw;
}
document = null;
dw.SetDocumentSaveOptions(null, null, null);
dw.History.ClearAll();
HistoryMemento newHA = new NullHistoryMemento(
PdnResources.GetString("AcquireImageAction.Name"),
ImageResource.Get("Icons.MenuLayersAddNewLayerIcon.png"));
dw.History.PushNewMemento(newHA);
appWorkspace.ActiveDocumentWorkspace = dw;
// Try to delete the temp file but don't worry if we can't
try
{
File.Delete(tempName);
}
catch
{
}
}
catch (Exception)
{
if (errorText != null)
{
Utility.ErrorBox(appWorkspace, errorText);
}
else
{
throw;
}
}
}
}