/// <summary>
/// Build cache
/// </summary>
private void BuildCache()
{
DocumentWalker walker = new DocumentWalker();
walker.VisualVisited += WalkerVisualVisited;
walker.Walk(_flowDocument);
}
/// <summary>
/// Clones a visual block
/// </summary>
/// <param name="block">block to be cloned</param>
/// <param name="pageNumber">current page number</param>
/// <returns>cloned block</returns>
/// <exception cref="InvalidProgramException">Error cloning XAML block</exception>
private ContainerVisual CloneVisualBlock(Block block, int pageNumber)
{
FlowDocument tmpDoc = new FlowDocument();
tmpDoc.ColumnWidth = double.PositiveInfinity;
tmpDoc.PageHeight = _report.PageHeight;
tmpDoc.PageWidth = _report.PageWidth;
tmpDoc.PagePadding = new Thickness(0);
string xaml = XamlWriter.Save(block);
Block newBlock = XamlReader.Parse(xaml) as Block;
if (newBlock == null)
{
throw new InvalidProgramException("Error cloning XAML block");
}
tmpDoc.Blocks.Add(newBlock);
DocumentWalker walkerBlock = new DocumentWalker();
ArrayList blockValues = new ArrayList();
blockValues.AddRange(walkerBlock.Walk <IInlineContextValue>(tmpDoc));
// fill context values
FillContextValues(blockValues, pageNumber);
DocumentPage dp = ((IDocumentPaginatorSource)tmpDoc).DocumentPaginator.GetPage(0);
return((ContainerVisual)dp.Visual);
}
/// <summary>
/// Creates a flow document of the report data
/// </summary>
/// <returns></returns>
/// <exception cref="ArgumentException">XAML data does not represent a FlowDocument</exception>
/// <exception cref="ArgumentException">Flow document must have a specified page height</exception>
/// <exception cref="ArgumentException">Flow document must have a specified page width</exception>
/// <exception cref="ArgumentException">"Flow document must have only one ReportProperties section, but it has {0}"</exception>
internal FlowDocument CreateFlowDocument()
{
MemoryStream mem = new MemoryStream();
byte[] buf = Encoding.UTF8.GetBytes(_xamlData);
mem.Write(buf, 0, buf.Length);
mem.Position = 0;
FlowDocument res = XamlReader.Load(mem) as FlowDocument;
if (res == null)
{
throw new ArgumentException("XAML data does not represent a FlowDocument");
}
if (res.PageHeight == double.NaN)
{
throw new ArgumentException("Flow document must have a specified page height");
}
if (res.PageWidth == double.NaN)
{
throw new ArgumentException("Flow document must have a specified page width");
}
// remember original values
_pageHeight = res.PageHeight;
_pageWidth = res.PageWidth;
// search report properties
DocumentWalker walker = new DocumentWalker();
List <SectionReportHeader> headers = walker.Walk <SectionReportHeader>(res);
List <SectionReportFooter> footers = walker.Walk <SectionReportFooter>(res);
List <ReportProperties> properties = walker.Walk <ReportProperties>(res);
if (properties.Count > 0)
{
if (properties.Count > 1)
{
throw new ArgumentException(String.Format("Flow document must have only one ReportProperties section, but it has {0}", properties.Count));
}
ReportProperties prop = properties[0];
if (prop.ReportName != null)
{
ReportName = prop.ReportName;
}
if (prop.ReportTitle != null)
{
ReportTitle = prop.ReportTitle;
}
// remove properties section from FlowDocument
DependencyObject parent = prop.Parent;
if (parent is FlowDocument)
{
((FlowDocument)parent).Blocks.Remove(prop); parent = null;
}
if (parent is Section)
{
((Section)parent).Blocks.Remove(prop);
}
}
if (headers.Count > 0)
{
PageHeaderHeight = headers[0].PageHeaderHeight;
}
if (footers.Count > 0)
{
PageFooterHeight = footers[0].PageFooterHeight;
}
// make height smaller to have enough space for page header and page footer
res.PageHeight = _pageHeight - _pageHeight * (PageHeaderHeight + PageFooterHeight) / 100d;
// search image objects
List <Image> images = new List <Image>();
walker.Tag = images;
walker.VisualVisited += WalkerVisualVisited;
walker.Walk(res);
// load all images
foreach (Image image in images)
{
if (ImageProcessing != null)
{
ImageProcessing(this, new ImageEventArgs(this, image));
}
try
{
if (image.Tag is string)
{
image.Source = new BitmapImage(new Uri("file:///" + Path.Combine(_xamlImagePath, image.Tag.ToString())));
}
}
catch (Exception ex)
{
// fire event on exception and check for Handled = true after each invoke
if (ImageError != null)
{
bool handled = false;
lock (ImageError)
{
ImageErrorEventArgs eventArgs = new ImageErrorEventArgs(ex, this, image);
foreach (var ed in ImageError.GetInvocationList())
{
ed.DynamicInvoke(this, eventArgs);
if (eventArgs.Handled)
{
handled = true; break;
}
}
}
if (!handled)
{
throw;
}
}
else
{
throw;
}
}
if (ImageProcessed != null)
{
ImageProcessed(this, new ImageEventArgs(this, image));
}
// TODO: find a better way to specify file names
}
return(res);
}
