Hi Darak,

• To export a map to xml you have to use map's elements geodetic coordinates. For SurfaceElement and PathElement this is the Polylines property and for SumbolElement this is the SymbolOrigin property . Try the following code:

private void ExportButton_Click(object sender, RoutedEventArgs e)
{
 var saveDialog = new SaveFileDialog
 {
  DefaultExt = "xml",
  Filter = "XML files (*.xml)|*.xml|All files (*.*)|*.*",
  FilterIndex = 1
 };

 if (saveDialog.ShowDialog() == true)
 {
  var map = ExportMapData(xamMap.Layers[0].Elements);

  var doc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"), map);

  using (var stream = saveDialog.OpenFile())
  {
   doc.Save(stream);
  }
 }
}

private XElement ExportMapData(IEnumerable<MapElement> elements)
{
 var sb = new StringBuilder();
 var map = new XElement("Map");

 foreach (var element in elements)
 {
  if (element is SurfaceElement)
  {
   ExportSurfaceElement((SurfaceElement)element, sb);                   
  }
  else if (element is SymbolElement)
  {
   ExportSymbolElement((SymbolElement)element, sb);                                       
  }
  else    // PathElement
  {
   ExportPathElement((PathElement)element, sb);                                                           
  }
  map.Add(new XElement("SpatialElement",
         new XAttribute("Name", element.Name ?? ""),
         new XAttribute("Caption", element.Caption ?? ""),
         new XAttribute("SpatialValue", sb.ToString())));

  sb.Clear();
 }

 return map;
}

private void ExportPathElement(PathElement element, StringBuilder sb)
{
 if (element.Polylines.Count > 0)
 {
  sb.Append("MULTILINESTRING ");
  sb.Append("(");

  ExportPolylines(element.Polylines, sb);

  sb.Append(")");
 }
 else
 {
  sb.Append("EMPTY");
 }
}       

private void ExportSymbolElement(SymbolElement element, StringBuilder sb)
{
 sb.Append("POINT ");
 sb.Append("(");

 var unprojectedPoint = xamMap.MapProjection.UnprojectFromMap(element.SymbolOrigin);
 sb.Append(unprojectedPoint.X.ToString(NumberFormatInfo.InvariantInfo)).Append(" ").Append(unprojectedPoint.Y.ToString(NumberFormatInfo.InvariantInfo));

 sb.Append(")");
}

private void ExportSurfaceElement(SurfaceElement element, StringBuilder points)
{
 if (element.Polylines.Count > 0)
 {
  points.Append("MULTIPOLYGON ");
  points.Append("(");

  ExportPolylines(element.Polylines, points);

  points.Append(")");
 }
 else
 {
  points.Append("EMPTY");
 }
}

private void ExportPolylines(IEnumerable<MapPolyline> polylines, StringBuilder sb)
{
 foreach (var polyline in polylines)
 {
  sb.Append("(");

  foreach (var point in polyline)
  {
   var unprojectedPoint = xamMap.MapProjection.UnprojectFromMap(point);
   sb.Append(unprojectedPoint.X.ToString(NumberFormatInfo.InvariantInfo)).Append(" ").Append(unprojectedPoint.Y.ToString(NumberFormatInfo.InvariantInfo)).Append(", ");
  }

  if (sb.Length > 0)
  {
   sb.Length -= 2;
  }

  sb.Append(")");
  sb.Append(", ");
 }

 if (sb.Length > 0)
 {
  sb.Length -= 2;
 }
}

• To import it back from xml use the following code:

private void ImportButton_Click(object sender, RoutedEventArgs e)
{
 var openDialog = new OpenFileDialog
 {
  Filter = "XML files (*.xml)|*.xml|All files (*.*)|*.*",
  FilterIndex = 1
 };

 if (openDialog.ShowDialog() == true)
 {
  using (var stream = openDialog.File.OpenRead())
  {
   var doc = XDocument.Load(stream);

   ImportSpatialData(doc);
  }
 }
}

private void ImportSpatialData(XDocument doc)
{
 var spatialData = from element in doc.Root.Elements()
       select new Dictionary<string, string>{
        { "Name", element.Attribute("Name").Value },
        { "Caption", element.Attribute("Caption").Value },
        { "SpatialValue", element.Attribute("SpatialValue").Value }};

 var layer = xamMap.Layers[0];

 layer.Reader = new SqlShapeReader
        {
         DataMapping = new DataMapping
        {
         new DataMappingPair("Name", "Name"),
         new DataMappingPair("Caption", "Caption"),
         new DataMappingPair("Data", "SpatialValue"),
        },
         DataSource = spatialData
        };           

 layer.ImportAsync();           
} 

internal class SpatialData
{
 public string Name { get; set; }
 public string Caption { get; set; }
 public string SpatialValue { get; set; }

 public SpatialData(string name, string caption, string spatialValue)
 {
  Name = name;
  Caption = caption;
  SpatialValue = spatialValue;
 }
}

Regards,

Ivan Kotev

Please take a look at this page: http://help.infragistics.com/NetAdvantage/DV/2010.3/CLR4.0/?page=xamWebMap_Creating_and_Editing_Custom_Shapefiles.html. It contains information how to create and editi custom shapefiles.

Regards,

Ivan Kotev