[GIS] How to work with .lyr files in ArcGIS Engine

arcgis-10.0arcgis-enginearcobjectsdevelopment

I want to be able to load .lyr files created in ArcMap and ArcGIS Engine and save any updates in symbology in ArcGIS Engine back to the .lyr file.

What APIs should I use the only method I found so far is MapControl.addLayerFromFile() but the MapControl only let's me load a .lyr file?

I found an API during writing the question so I add an answer myself so it can be a wiki.

Best Answer

There is an Interface ILayerFile in the carto namespace that can be used for this purpose. See also the samples: How to save a layer file, Save a layer file in a MapControl application

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ArcGIS Progress – Showing Progress in ArcGIS Engine Application

The code below works for me. If you load a new map, you'll need to re-wire your events. Maybe try start animating when IDisplayEvents.Start fires (and IViewRefresh.Drawing is true). Then stop animating when IActiveViewEvents.AfterDraw fires with drawPhase == esriViewDrawPhase.esriViewForeground.

private IDisplayEvents_Event m_dispevt;
private IActiveViewEvents_Event m_avEvt;
private int m_lastTick;
private void WireEvents(IMap map)
{
    Debug.Print("wiring");
    m_dispevt = ((IActiveView)map).ScreenDisplay as IDisplayEvents_Event;
    m_dispevt.DisplayStarted += new IDisplayEvents_DisplayStartedEventHandler(MainForm_DisplayStarted);
    m_dispevt.DisplayFinished += new IDisplayEvents_DisplayFinishedEventHandler(MainForm_DisplayFinished);
    m_dispevt.DisplayInvalidated += new IDisplayEvents_DisplayInvalidatedEventHandler(MainForm_DisplayInvalidated);
    m_dispevt.DisplayScrolled += new IDisplayEvents_DisplayScrolledEventHandler(MainForm_DisplayScrolled);
    m_avEvt = (IActiveViewEvents_Event)map;
    m_avEvt.AfterDraw += new IActiveViewEvents_AfterDrawEventHandler(m_avEvt_AfterDraw);
    m_avEvt.AfterItemDraw += new IActiveViewEvents_AfterItemDrawEventHandler(m_avEvt_AfterItemDraw);
}

void m_avEvt_AfterItemDraw(short Index, IDisplay Display, esriDrawPhase phase)
{
    Debug.Print("afteritemdraw {0} {1}", Index, phase);
}

void m_avEvt_AfterDraw(IDisplay Display, esriViewDrawPhase phase)
{
    if(phase == esriViewDrawPhase.esriViewForeground)
        Debug.Print("foreground finished afterdraw {0} {1} msecs", phase, Environment.TickCount - m_lastTick);
    if (phase == esriViewDrawPhase.esriViewBackground)
        m_lastTick = Environment.TickCount;
}

void MainForm_DisplayScrolled(IDisplay Display, int deltaX, int deltaY)
{
    Debug.Print("scrolled");
}

void MainForm_DisplayInvalidated(IDisplay Display, ESRI.ArcGIS.Geometry.IEnvelope rect, bool erase, short cacheID)
{
    Debug.Print("invalidated");
}

void MainForm_DisplayFinished(IDisplay Display)
{
    Debug.Print("finished");
}

void MainForm_DisplayStarted(IDisplay Display)
{
    Debug.Print("started {0}", ((IViewRefresh)axMapControl1.Map).Drawing);
}

[GIS] Which API should we use for printing a PageLayout

PrintAndExport is the recommended approach at ArcGIS 10. This class was not just added for data driven pages support. It was added as a wrapper method to simplify print and export for developers. In addition to wrapping many COM calls, it also handles many of the GDI/Win32 calls that are needed for correct printing and exporting.

Best Answer

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ArcGIS Progress – Showing Progress in ArcGIS Engine Application

[GIS] Which API should we use for printing a PageLayout

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