ArcGISEngine realizes zooming in, zooming out and panning on the map

ArcGISEngine implements zooming in, zooming out and panning on the map:

 Personally, I think it is panning, but the Internet is all roaming. In layman's terms, it is just pulling a map object from one side to the other. Just watch what people say.

 Implementation:

First, the introduction of namespace

   using ESRI.ArcGIS.Geometry;

   using ESRI.ArcGIS.Controls;

Second, the code implementation.

  

int flag = 0;
  private void 放大ToolStripMenuItem_Click(object sender, EventArgs e){
  axMapControl1.MousePointer = esriControlsMousePointer.esriPointerPageZoomIn;
   flag = 1;
        }

  private void 缩小ToolStripMenuItem_Click(object sender, EventArgs e){
   axMapControl1.MousePointer = esriControlsMousePointer.esriPointerPageZoomOut;
   flag = 2;
        
        }

  private void 平移ToolStripMenuItem_Click(object sender, EventArgs e){
   axMapControl1.MousePointer = esriControlsMousePointer.esriPointerPan;
   flag = 3;
     }

   private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e){
   IEnvelope ipenv= axMapControl1.TrackRectangle();
      if(flag==1){

        axMapControl1.Extent = ipenv;
      }else if(flag==2){

           ipenv = axMapControl1.Extent;
           ipenv.Expand(2, 2, true);
           axMapControl1.Extent = ipenv;
            }else if(flag==3){

               ipenv= axMapControl1.Extent ;
                axMapControl1.Pan();
            }
           
        }
    }

 

 3. Supplement:

   In AE, when adding .jpg and .bmp type layer files to the map control, it is much simpler to call the following method.

   

IRasterLayer rasterLayer = new RasterLayer();
 rasterLayer.CreateFromFilePath(str);
 axMapControl1.AddLayer (rasterLayer, 0);

 where str is the file path.