Mapxtreme 添加和删除图元并且添加一些自定义的属性

        /**//// <summary>
        /// 给给定图层添加图元
        /// </summary>
        /// <param name="layerName"></param>
        /// <param name="list"></param>
        private void DrawFeature(string layerName, ArrayList list)
        {
            DPoint dpoint;
            Point point;
            BitmapPointStyle vs;
            Feature f;
            FeatureLayer flayer;

            try
            {
                flayer = map.Layers[layerName] as FeatureLayer;
                if (flayer == null)
                    return;

                Table fTable = flayer.Table;

                foreach (object o in list)
                {
                    
                    Trouble t = (Trouble) o;
                    dpoint = new DPoint(t.X, t.Y);
                    point = new Point(map.GetDisplayCoordSys(), dpoint);

                    vs = new BitmapPointStyle();
                    vs.Name = @t.BmpName;
                    vs.PointSize = Convert.ToInt16(24);
                    vs.Attributes = StyleAttributes.PointAttributes.BaseAll;
                    vs.SetApplyAll();

                    f = new Feature(fTable.TableInfo.Columns);
                    f.Geometry = point;
                    f.Style = vs;
                    f[GlobalHelper.MIFields[0]] = t.TroubleType;
                    f[GlobalHelper.MIFields[1]] = t.Id;
                    f[GlobalHelper.MIFields[2]] = t.SpecTypeCode;


                    flayer.Table.InsertFeature(f);
                }

            }
            catch (Exception ex)
            {
                GlobalHelper.ShowError("绘制隐患图元错误，原因：" + ex.Message);
            }

        }

上半部分都是获得地理信息和图标，到了这边

                    f = new Feature(fTable.TableInfo.Columns);
                    f.Geometry = point;
                    f.Style = vs;
                    f[GlobalHelper.MIFields[0]] = t.TroubleType;
                    f[GlobalHelper.MIFields[1]] = t.Id;
                    f[GlobalHelper.MIFields[2]] = t.SpecTypeCode;
第一句主要是从图层的表中获得列结构，然后给这个feature赋值地理信息和图标，后面三句就是给这个feature添加编号和类型等信息（当然这些属性都是图层表中的结构），这样当点击图元的时候可以根据这些信息进行搜索
如下代码可以创建表结构

/**//// <summary>
        /// 创建图层
        /// </summary>
        /// <param name="tableName"></param>
        public static void CreateLayerTableFile(string tableName, Map map)
        {
            try {
                string[] colNames = GlobalHelper.MIFields;
                TableInfoNative ti = new TableInfoNative(tableName);
                ti.TablePath = GlobalHelper.UserMapFilePath + tableName + ".tab";
                ti.DataPath = GlobalHelper.UserMapFilePath + tableName + ".dat";
                //添加列
                ti.Columns.Add(ColumnFactory.CreateFeatureGeometryColumn(map.GetDisplayCoordSys()));
                ti.Columns.Add(ColumnFactory.CreateStyleColumn());
                for (int i = 0; i < colNames.Length; i++)
                {
                    Column c = ColumnFactory.CreateStringColumn(colNames[i], 150);
                    //给ID做索引，方便搜索
                    if (colNames[i].Equals("ID"))
                        c.Indexed = true;
                    ti.Columns.Add(c);
                }
                ti.WriteTabFile();
                //插入图层
                Table table = Session.Current.Catalog.CreateTable(ti);
                FeatureLayer flayer = new FeatureLayer(table);
                map.Layers.Add(flayer);
            }catch(Exception ex) {
                GlobalHelper.ShowError("创建图层文件出错，原因：" + ex.Message);
            }

        }

转载于:https://www.cnblogs.com/tigertian/archive/2008/10/05/1304115.html