在winfrom中使用mapxtreme2008,其中实现测距工具时,在mapControl_MouseClick中取到位置点:
List<System.Drawing.Point> disPtList = new List<System.Drawing.Point>(); private void mapControl_MouseClick(object sender, MouseEventArgs e) { try { if (mapControl.Tools.LeftButtonTool == MapToolKit.Distance) { if (e.Button == MouseButtons.Left) { disPtList.Add(new System.Drawing.Point(e.X, e.Y)); double minPix = mapControl.Map.Zoom.Value * 1.609 / mapControl.Width; double dis = 0, disAll = 0; for (int i = 0; i < disPtList.Count - 1; i++) { dis = Math.Sqrt((disPtList[i].X - disPtList[i + 1].X) * (disPtList[i].X - disPtList[i + 1].X) + (disPtList[i].Y - disPtList[i + 1].Y) * (disPtList[i].Y - disPtList[i + 1].Y)) * minPix; disAll += dis; } StringBuilder stb = new StringBuilder(50); stb.Append("当前距离:"); stb.Append(dis.ToString("f3")); stb.Append("km,总距离:"); stb.Append(disAll.ToString("f3")); stb.Append("km"); toolStripStatusLabelMousePos.Text = stb.ToString(); RefreshDistance(); //在地图上画测距的线 } }
其中的minPix可以认为是当前地图的缩放系数