全图

来源：互联网发布：淘宝怎么发淘口令编辑：程序博客网时间：2024/04/28 05:11

全图
public void Extend(PictureBox m_PictureBox)
        {
            try
            {

                String m_sDataFrame = map.GetDefaultMapName();
                fuzhou.MapServerInfo mapi = map.GetServerInfo(m_sDataFrame);

                fuzhou.Envelope pEnvelope = mapi.FullExtent;
                fuzhou.MapDescription pMapDescription = m_sMapDesc;
                fuzhou.MapExtent pMapExtext = new fuzhou.MapExtent();
                pMapExtext.Extent = pEnvelope;
                pMapDescription.MapArea = pMapExtext;

                // save the map description and draw the map
                m_sMapDesc = pMapDescription;
                drawMap(ref pMapDescription, m_PictureBox);
            }
catch (Exception exception)
            {
                MessageBox.Show(exception.Message, "An error has occurred");
            }
        }
放大操作的基本原理是取得mapserver服务器该地图的FullExtent，然后将其转换提交服务器，取得图形进行显示
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