MapWinGIS4.9.3的二次開發

昨晚花了三個小時的時間，寫了個MapWinGIS4.9.3二次開發的Demo。發現新版本接口變了好多，特別是註記和自定義圖元。

代碼摘錄如下：

            //設置標記
            MapWinGIS.Labels lbl = fileName4.Labels;
            fileName4.Labels.Generate("[NAME]", MapWinGIS.tkLabelPositioning.lpCenter, false);
            fileName4.Labels.FrameVisible = false;
            fileName4.Labels.FontColor = (uint)ColorTranslator.ToOle(Color.DarkViolet);

            //換圖元
            MapWinGIS.Image img = new MapWinGIS.Image();
            if (img.Open(Environment.CurrentDirectory + @"\MapIcon\town.png",
                MapWinGIS.ImageType.USE_FILE_EXTENSION, true, null))
            {
                MapWinGIS.ShapefileCategory ct = fileName4.Categories.Add("Town");
                ct.Expression = "[Name] <> \"\"";
                ct.DrawingOptions.PointType = MapWinGIS.tkPointSymbolType.ptSymbolPicture;
                ct.DrawingOptions.Picture = img;
            }
            fileName4.DefaultDrawingOptions.Visible = false;   // hide all the unclassified points
            fileName4.Categories.ApplyExpressions();

下面來一張效果圖。