private void btnChangeRGBRenderer_Click(object sender, EventArgs e)
{
//Only effective to Raster Layer
IMap map = axMapControl1.ActiveView.FocusMap;
ILayer aLayer = map.get_Layer(0);
//IRasterLayer rLayer = map.get_Layer(3) as IRasterLayer;
//IRasterLayer rLayer = (IRasterLayer)aLayer;
IRasterLayer rLayer = aLayer as IRasterLayer;
IRaster raster = rLayer.Raster;
IRasterBandCollection bandCol = raster as IRasterBandCollection;
if (bandCol.Count < 3)
{
//not meet the requirements
return;
}
IRasterRGBRenderer rgbRen = new RasterRGBRenderer();
IRasterRenderer rasRen = rgbRen as IRasterRenderer;
rasRen.Raster = raster;
rasRen.Update();
//change band ro renderer
rgbRen.RedBandIndex = 2;
rgbRen.GreenBandIndex = 1;
rgbRen.BlueBandIndex = 0;
//updtae renderer and refresh layer
rLayer.Renderer = rgbRen as IRasterRenderer;
axMapControl1.ActiveView.Refresh();
axTOCControl1.Update();
}
private void RGBCompositeRender(ILayer pLayerR, int bandred, int bandgreen, int bandblue)
{
// Get raster input from layer
IRasterLayer rasterLayer = (IRasterLayer)pLayerR;
IRaster raster = rasterLayer.Raster;
IRasterBandCollection bandCol = (IRasterBandCollection)raster;
if (bandCol.Count < 3)
{
return;
}
// Create UniqueValue renderer and QI RasterRenderer
IRasterRGBRenderer2 rasterRGBRen = new RasterRGBRenderer() as IRasterRGBRenderer2;
IRasterRenderer rasterRen = (IRasterRenderer)rasterRGBRen;
// Connect the renderer and the raster
rasterRen.Raster = raster;
rasterRen.Update();
rasterRGBRen.RedBandIndex = bandred;
rasterRGBRen.GreenBandIndex = bandgreen;
rasterRGBRen.BlueBandIndex = bandblue;
//Update render and refresh layer
rasterRen.Update();
rasterLayer.Renderer = (IRasterRenderer)rasterRGBRen;
}
public static bool UsingRGBRenderer(IRasterLayer irasterLayer_0)
{
IRaster raster = irasterLayer_0.Raster;
IRasterBandCollection bands = raster as IRasterBandCollection;
if (bands.Count < 3)
{
return(false);
}
IRasterRGBRenderer renderer = new RasterRGBRenderer();
IRasterRenderer renderer2 = renderer as IRasterRenderer;
renderer2.Raster = raster;
renderer2.Update();
renderer.RedBandIndex = 2;
renderer.GreenBandIndex = 1;
renderer.BlueBandIndex = 0;
renderer2.Update();
irasterLayer_0.Renderer = renderer as IRasterRenderer;
return(true);
}
public static IRasterRGBRenderer RasterRGBRenderer(IRasterLayer irasterLayer_0)
{
IRasterRGBRenderer rasterRGBRenderer;
try
{
IRasterRGBRenderer rasterRGBRendererClass = new RasterRGBRenderer();
IRasterRenderer raster = (IRasterRenderer)rasterRGBRendererClass;
raster.Raster = irasterLayer_0.Raster;
rasterRGBRendererClass.RedBandIndex = 0;
rasterRGBRendererClass.GreenBandIndex = 1;
rasterRGBRendererClass.BlueBandIndex = 2;
raster.Update();
rasterRGBRenderer = raster as IRasterRGBRenderer;
}
catch (Exception exception)
{
Debug.WriteLine(exception.Message);
rasterRGBRenderer = null;
}
return(rasterRGBRenderer);
}
