在MapXtreme 2005中添加标注图层是非常容易的，只要知道要标准的表和相关的列，几行代码就搞定了，比想像中要容易多了。当然还有一些标注样式可以设置，可以从类库中查到相关的说明。
/// <summary>
/// 添加标注图层
/// Design by Glacier
/// 2008年8月6日
/// <param name="tableName">标注的表名</param>
/// <param name="columnName">标注的列名</param>
/// </summary>
public static void ShowLabelLayer(string tableName, string columnName)
{
MapInfo.Mapping.Map myMap = MapInfo.Engine.Session.Current.MapFactory[MapControl1.MapAlias];
//新建标注图层
LabelLayer labelLayer = new LabelLayer();
myMap.Layers.Add(labelLayer);
//指定要标注的数据表
LabelSource labelSource = new LabelSource(MapInfo.Engine.Session.Current.Catalog.GetTable(tableName);
labelLayer.Sources.Append(labelSource);
//指定要标准字段所在的列
labelSource.DefaultLabelProperties.Caption = columnName;
//标注样式等属性
//source.DefaultLabelProperties.Visibility.Enabled = true;
//source.DefaultLabelProperties.Visibility.VisibleRangeEnabled = true;
//source.DefaultLabelProperties.Visibility.VisibleRange = new VisibleRange(0.01, 10, MapInfo.Geometry.DistanceUnit.Mile);
//source.DefaultLabelProperties.Visibility.AllowDuplicates = true;
//source.DefaultLabelProperties.Visibility.AllowOverlap = true;
//source.DefaultLabelProperties.Visibility.AllowOutOfView = true;
//source.Maximum = 50;
//source.DefaultLabelProperties.Layout.UseRelativeOrientation = true;
//source.DefaultLabelProperties.Layout.RelativeOrientation = MapInfo.Text.RelativeOrientation.FollowPath;
//source.DefaultLabelProperties.Layout.Angle = 33.0;
//source.DefaultLabelProperties.Priority.Major = "index";
//source.DefaultLabelProperties.Layout.Offset = 7;
//source.DefaultLabelProperties.Layout.Alignment = MapInfo.Text.Alignment.BottomRight;
//Font font = new Font("黑体", 10);
//font.ForeColor = System.Drawing.Color.DarkBlue;
//source.DefaultLabelProperties.Style.Font = font;
}
