MapInfo添加文字标签效果的代码

2016-09-01 08:43:03 访问(1393) 赞(0) 踩(0)


        /// <summary>
        /// label数据源，显示地图
        /// </summary>
        public void labelShow()
        {
            Catalog Cat
                    =
                    MapInfo.Engine.Session.Current.Catalog;

            Table table = Cat.GetTable("Point_temp");

            FeatureLayer featureLayer = new FeatureLayer(table);

            this.mapControl1.Map.Layers.Add(featureLayer);

            LabelLayer labelLayer = new LabelLayer();
            this.mapControl1.Map.Layers.Insert(0, labelLayer);

            LabelSource source = new LabelSource(table);

            source.DefaultLabelProperties.Caption = "CarNo";
            source.DefaultLabelProperties.Layout.Offset = 12;

            source.DefaultLabelProperties.Visibility.VisibleRangeEnabled = true;
            source.DefaultLabelProperties.Visibility.VisibleRange = new VisibleRange(0, 1, MapInfo.Geometry.DistanceUnit.Kilometer);
            MapInfo.Data.SearchInfo info = MapInfo.Data.SearchInfoFactory.SearchWhere("CarNo='民航C70123'");
            info.QueryDefinition.AppendColumns("CarNo");
            Feature nyState = Session.Current.Catalog.SearchForFeature(table, info);


            LabelProperties properties = new LabelProperties();
            properties.Attributes = LabelAttribute.VisibilityEnabled | LabelAttribute.Caption | LabelAttribute.Style;
            properties.Visibility.Enabled = true;
            properties.Caption = "CarNo";
            properties.Style.Font.ForeColor = Color.Blue;
            properties.Style.Font.Size = 9;
            SelectionLabelModifier modifier = new SelectionLabelModifier();
            modifier.Properties.Add(nyState.Key, properties);
            source.Modifiers.Append(modifier);
            labelLayer.Sources.Append(source);

        }