1.LayoutControl And MapControl View synchronization

1.1. View synchronization

/// <summary>
///  The map view is synchronized with the data view 
/// </summary>
/// <param name="mapcontrol"></param>
/// <param name="layoutControl"></param>
public static void CopyMapToLayput(AxMapControl mapcontrol,AxPageLayoutControl layoutControl)
{
    
    if (mapcontrol is null) return;
    layoutControl.ActiveView.Clear();
    IObjectCopy objectCopy = new ObjectCopyClass();
    var from = objectCopy.Copy(mapcontrol.Map);
    object to = layoutControl.ActiveView.FocusMap;
    objectCopy.Overwrite(from, ref to);
    layoutControl.ZoomToWholePage();
}

1.2. principle

copy front ,mapcontrol.extent Equal to the range of the red box on the figure （range）, However copy The display range has changed after , This is because copy There is no change in the front and back scale , namely

• LayoutControl.ActiveView.FocusMap.MapScale = mapcontrol.MapScale .

therefore copy after ,

• The width of the red frame =range.Width / mapcontrol.MapScale * 100( centimeter );（ about 5.9743461756502541 centimeter ）
• Height of red frame =range.Height / mapcontrol.MapScale * 100( centimeter ); about （6.9638472610237478 centimeter ）

Compared with the properties of the data frame ,copy The rear layout view is centered as shown in the figure above

Use the code to find that the attribute of the data frame in the figure above is ：

  var lw = pMapFrame.MapBounds.Width / pMapFrame.MapScale*100;
  var lh = pMapFrame.MapBounds.Height / pMapFrame.MapScale * 100;

1.3. Print view zooms to the visible range of a map view

from 1.2 The principle analysis of , To keep the print view consistent with the data view range , It needs to be adjusted by comparing the example ruler , Generally, small changes are used to adapt to the whole range （ Adapt with large changes , The other side is out of range ）, The code is as follows ：

/// <summary>
///  Range adaptation 
/// </summary>
/// <param name="env"></param>
/// <returns></returns>
private IEnvelope CalExtent(IEnvelope env)
{
    
    IEnvelope result = new EnvelopeClass();
    var pGraphicsContainer = LayoutControl.ActiveView as IGraphicsContainer;
    IMapFrame pMapFrame = (IMapFrame)pGraphicsContainer.FindFrame(LayoutControl.ActiveView.FocusMap);
    // The length and width of the data frame of the actual display element 
    var lw = pMapFrame.MapBounds.Width / pMapFrame.MapScale*100;
    var lh = pMapFrame.MapBounds.Height / pMapFrame.MapScale * 100;
    //mapcontrol The length and width of 
    var mw = env.Width;
    var mh = env.Height;
    /// copy The front and back scales remain unchanged ,
    ///  So calculate the width of the actual database （lw  centimeter ） And the width on the project scope width drawing （mw / mapcontrol.MapScale * 100  centimeter ） The ratio of the 
    var d1 = lw / (mw / mapcontrol.MapScale * 100);
    /// Highly similar 
    var d2 = lh / (mh / mapcontrol.MapScale * 100);
    /// Adjust the range of the whole map with small changes 
    var d=Math.Min(d1, d2);
    LayoutControl.ActiveView.FocusMap.MapScale = mapcontrol.MapScale / d;
    if (Scalces.Count() > 4)
        Scalces.Remove(Scalces.LastOrDefault());
    var scale = $"1：{
      LayoutControl.ActiveView.FocusMap.MapScale.ToString("F3")}";
    Scalces.Add(scale);
    SelectedScale = scale;
    Marshal.ReleaseComObject(pGraphicsContainer);
    return result;
}

The adaptation results are shown in the figure below ：

2.LayoutControl Point extraction on Mapcontrol The points on the

private void LayoutControl_OnMouseDown(object sender, IPageLayoutControlEvents_OnMouseDownEvent e)
{
    
	 var point = CalMapPoint(e.pageX, e.pageY);
}
/// <summary>
/// LayoutControl The point on the push back mapcontrol The actual position on the 
/// </summary>
/// <param name="pageX"></param>
/// <param name="pageY"></param>
/// <returns></returns>
private IPoint CalMapPoint(double pageX,double pageY)
{
    
    ///copy Before the map mapcontrol.Actiview.Extent
    /// Since adaptation has been made , therefore vb≠ Current mapcontrol.Actiview.Extent
    var vb = mapcontrol.ActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds;
    //frame The actual pixel size for the map control , Corresponding to the current mapcontrol.Actiview.Extent
    //var frame = mapcontrol.ActiveView.ScreenDisplay.DisplayTransformation.get_DeviceFrame();
    var pMapFrame = (IMapFrame)LayoutControl.ActiveView.GraphicsContainer.FindFrame(LayoutControl.ActiveView.FocusMap);
    // The length and width of the data frame of the actual display element 
    var lw = pMapFrame.MapBounds.Width / pMapFrame.MapScale * 100;
    var lh = pMapFrame.MapBounds.Height / pMapFrame.MapScale * 100;
    //mapcontrol Distance on the road /layoutcontrol The distance on the graph 
    double mapDisPerCm;
    IPoint point = new PointClass();
    ///mapcontrol Partial width , The width shall prevail 
    if (vb.Width / lw > vb.Height / lh)
    {
    
        mapDisPerCm = vb.Width / lw;
        // The actual height on the map （ centimeter ）
        var mapHeightCm = vb.Height / mapDisPerCm;
        //vb The lower left corner is layoutcontrol The corresponding coordinates on （ Relative to the lower left corner of the whole paper ）
        var lxCm = (Width - lw) / 2;
        var lyCm = (Height - mapHeightCm) / 2;
        //e.pageX It means the whole A4 The lower left corner of the paper , Larger than the data frame 
        var mapX = vb.XMin + (pageX - lxCm) * mapDisPerCm;
        var mapY = vb.YMin + (pageY - lyCm) * mapDisPerCm;
        point.PutCoords(mapX, mapY);
    }
    ///mapcontrol High , The height shall prevail 
    else
    {
    
        mapDisPerCm = vb.Height / lh;
        // The actual width on the map （ centimeter ）
        var mapWidthCm = vb.Width / mapDisPerCm;
        //vb The lower left corner is layoutcontrol The corresponding coordinates on （ Relative to the lower left corner of the whole paper ）
        var lxCm = (Width - mapWidthCm) / 2;
        var lyCm = (Height - lh) / 2;
        //e.pageX It means the whole A$ The lower left corner of the paper , Larger than the data frame 
        var mapX = vb.XMin + (pageX - lxCm) * mapDisPerCm;
        var mapY = vb.YMin + (pageY - lyCm) * mapDisPerCm;
        point.PutCoords(mapX, mapY);
    }
    return point;
}