AnnCodecs Class

Provides support for loading and saving objects to annotation files.

Object Model

Syntax

WinRT C#
WinRT JavaScript

public sealed class AnnCodecs

function Leadtools.Annotations.Core.AnnCodecs()

Remarks

This class supports loading and saving annotation objects from/to an XML string as well as getting information on previously saved annotations data.

This class also supports saving and loading multi-page annotation data where each page contains a full Annotation Container.

Use the SaveAsync method to save an annotation container as XML data. You can then use the browser capabilities to save this XML data to disk or use a Web Service to store it on a server. The SerializeOptions property can be used to set saving options and monitor the objects being saved.

Use the LoadAsync method to load an annotation container from XML data. The XML data must be previously loaded from disk using the browser capabilities or obtained from a server using a Web Service. The DeserializeOptions property can be used to set loading options, monitor the objects being loaded and handle errors.

Use the GetInfoAsync to check if an XML data contains valid annotations data such as the format and number of pages.

LEADTOOLS supports saving multiple annotations into the same data. This can be used to save the annotations of a multi-page document in the same data.

Example

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

[TestMethod]
public async Task AnnCodecs_AnnCodecs()
{
   // Create a new annotation container, 8.5 by 11 inches
   AnnContainer container = new AnnContainer();
   // Size must be in annotation units (1/720 of an inch)
   container.Size = LeadSizeDHelper.Create(8.5 * 720, 11 * 720);
   double inch = 720.0;
   // Add a red line object, from 1in 1in to 2in 2in
   AnnPolylineObject lineObj = new AnnPolylineObject();
   lineObj.Points.Add(LeadPointDHelper.Create(1 * inch, 1 * inch));
   lineObj.Points.Add(LeadPointDHelper.Create(2 * inch, 2 * inch));
   lineObj.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Red"), LeadLengthDHelper.Create(1));
   container.Children.Add(lineObj);

   // Add a blue on yellow rectangle from 3in 3in to 4in 4in
   AnnRectangleObject rectObj = new AnnRectangleObject();
   rectObj.Rect = LeadRectDHelper.Create(3 * inch, 3 * inch, 1 * inch, 1 * inch);
   rectObj.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Blue"), LeadLengthDHelper.Create(1));
   rectObj.Fill = AnnSolidColorBrush.Create("Yellow");
   container.Children.Add(rectObj);

   // Show the container
   ShowContainer("Before save", container);

   // Create the codecs object to save and load annotations
   AnnCodecs codecs = new AnnCodecs();

   // Save the container

   string destFileName = @"container.xml";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(saveFile, container, AnnFormat.Annotations, 1);

   // delete the container
   container = null;

   // Show information about the data we just saved
   AnnCodecsInfo info = await codecs.GetInfoAsync(saveFile);
   string message;
   if (info.Format == AnnFormat.Annotations)
   {
      message = "Version: ";
      message += info.Version;
      message += " No. of pages: ";
      message += info.Pages.Length;
      message += " page nos: ";
      for (int i = 0; i < info.Pages.Length; i++)
      {
         message += info.Pages[i] + " ";
      }
   }
   else
   {
      message = "Invalid annotations data";
   }

   Debug.WriteLine(message);

   // Load the container we just saved
   container = await codecs.LoadAsync(saveFile, 1);

   // Show it
   ShowContainer("After load", container);
}

private void ShowContainer(String message, AnnContainer container)
{
   string str = message + "\nContainer size: ";

   // Add the size
   double inch = 720;
   double width = container.Size.Width / inch;
   double height = container.Size.Height / inch;
   str += width + " by " + height + " inches" + "\n";

   // Add the objects
   str += "Contains " + container.Children.Count + " objects(s)\n";
   for (int i = 0; i < container.Children.Count; i++)
   {
      AnnObject annObj = container.Children[i];

      str += "Object: " + annObj.FriendlyName + " at ";
      for (int j = 0; j < annObj.Points.Count; j++)
      {
         LeadPointD pt = annObj.Points[j];
         double x = pt.X / inch;
         double y = pt.Y / inch;
         str += "(" + x + ", " + y + ") ";
      }

      str += "\n";
   }

   Debug.WriteLine(str);
}

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

AnnCodecs Members
Leadtools.Annotations.Core Namespace
Annotation Files