ArcEngine序列化矢量图层的标注属性

				/// <summary>
        /// 序列化图层的标注属性
        /// </summary>
        /// <param name="lyr">矢量图层</param>
        /// <returns>byte[]，包括标注的字体样式和位置</returns>
        public static byte[] SerializeLabelProperty(IGeoFeatureLayer lyr)
        {
            try
            {
                    IXMLStream pStream = new XMLStreamClass();
                    IXMLWriter pWriter = new XMLWriterClass();
                    pWriter.WriteTo((IStream)pStream);
                    IXMLSerializer pSerializer = new XMLSerializerClass();
                    ESRI.ArcGIS.Carto.IAnnotateLayerProperties pAnno;
                    IElementCollection pEle;
                    IElementCollection pEle2;
                    lyr.AnnotationProperties.QueryItem(0, out pAnno, out pEle, out pEle2);
                    ILabelEngineLayerProperties pLabelPro = pAnno as ILabelEngineLayerProperties;
                    ESRI.ArcGIS.Carto.IBasicOverposterLayerProperties pBasicLyrProp = pLabelPro.BasicOverposterLayerProperties;
                    ESRI.ArcGIS.Display.IFormattedTextSymbol pFormatSymbol = pLabelPro.Symbol as ESRI.ArcGIS.Display.IFormattedTextSymbol;
                    IPropertySet propertySet = new PropertySetClass();
                    propertySet.SetProperty("BasicOverposterLayerProperties", pBasicLyrProp);
                    propertySet.SetProperty("FormattedTextSymbol", pFormatSymbol);
                    pSerializer.WriteObject(pWriter, null, null, "", "", propertySet);
                    return pStream.SaveToBytes();
            }
            catch
            {
                return null;
            }
            return null;
        }

图层的标注属性，除了字段值及样式以外，还有字体的旋转角度等，使用序列化的方式直接保存起来，

方便使用，可能需要以下引用：

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Windows.Forms;
using System.Drawing;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.DataSourcesRaster;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesRasterUI;
using Pacia.Map.Engine;
using ESRI.ArcGIS.Display;