在水晶报表中加载ArcEngine地图

众所周知
水晶报表中动态更新
只能通过与数据库的连接实现

于是得出
若要将地图窗口的视图动态打印出来
可以通过以下这种思路：
1.构建数据表，最好是在本地，避免网络耗时；在其中添加blob字段。
2.程序中加载Crystal viewer，与报表关联；
3.编程获取mapcontrol的当前视图，并导出为图像格式；
4.将ArcEngine导出的图片通过二进制格式读入到报表关联的数据库blob字段中；
5.针对水晶报表中blob字段对应的对象，则可以显示出欲打印的地图。

部分参考代码如下：
private void simpleButton1_Click(object sender, System.EventArgs e)
                {
                        ESRI.ArcGIS.esriSystem.IObjectCopy ObjectCopy = new ESRI.ArcGIS.esriSystem.ObjectCopyClass();
                        ESRI.ArcGIS.Carto.IActiveView View0;
                        View0 = this.axMapControl1.ActiveView;
                        //导出图片
                        ESRI.ArcGIS.Output.IExport Export;
                        Export = new ESRI.ArcGIS.Output.ExportJPEGClass();
                        Export.ExportFileName = "1053.jpg";
                        //Export.Resolution = 96;

                        ESRI.ArcGIS.Display.tagRECT exportRec;
                        exportRec = View0.ExportFrame;
                        ESRI.ArcGIS.Geometry.IEnvelope Bounds = new ESRI.ArcGIS.Geometry.EnvelopeClass();
                        Bounds.PutCoords(exportRec.left,exportRec.top,exportRec.right,exportRec.bottom);
                        Export.PixelBounds = Bounds;

                        int hdc;
                        hdc = Export.StartExporting();

                        View0.Output(hdc,96,ref exportRec,null,null);

                        Export.FinishExporting();
                        Export.Cleanup();      
                       
                        Form2 frm = new Form2();
                        frm.ShowDialog();
                }






private void Form2_Load(object sender, System.EventArgs e)
                {
                        YSSQ cr = new YSSQ();
                        DataSet ds = new DataSet();
                        String path;
                        DataColumn column = new DataColumn();
                        DataRow row;

                        //调整格式
                        BlobFieldObject BObj;
                        BObj = cr.ReportDefinition.ReportObjects["XMTB1"] as BlobFieldObject;
                       
                       
                        //构造一个对应于xsd文件的表结构
                        ds.Tables.Add("Map");
                        ds.Tables[0].Columns.Add("XMBH",System.Type.GetType("System.String"));
                        ds.Tables[0].Columns.Add("XMTB",System.Type.GetType("System.Byte[]"));
                        //写入数据
                        path="1053.jpg";
               
                        row = ds.Tables[0].NewRow();
                        row[0] = "J0000001";
                        FileStream fs = new FileStream(path,FileMode.Open);//获取文件流
                        BinaryReader br = new BinaryReader(fs);//创建二进制读取对象
                        int len = (int)br.BaseStream.Length;
                        row[1] = br.ReadBytes(len);
                        ds.Tables[0].Rows.Add(row);
                        br.Close();
                        fs.Close();

                        cr.SetDataSource(ds);
                        this.crystalReportViewer1.ReportSource = cr;
               
               
                }