private static async void SetRasterColorByRGBAttributeFields(RasterLayer raster, List <string> fields)
{
await QueuedTask.Run(() =>
{
// set fieldName to the first column
var fieldName = "n/a";
bool setFieldName = false;
foreach (var attributeColumn in fields)
{
if (attributeColumn.Equals("value", StringComparison.OrdinalIgnoreCase))
{
setFieldName = true;
}
else
{
if (setFieldName)
{
fieldName = attributeColumn;
break;
}
}
}
var colorizerDef = new UniqueValueColorizerDefinition(fieldName);
var colorizer = raster.CreateColorizer(colorizerDef);
raster.SetColorizer(colorizer);
});
}
private static async void SetRasterColorByAttributeField(RasterLayer raster, string fieldName, StyleProjectItem styleProjItem)
{
await QueuedTask.Run(() =>
{
var ramps = styleProjItem.SearchColorRamps("Green Blues");
CIMColorRamp colorRamp = ramps[0].ColorRamp;
var colorizerDef = new UniqueValueColorizerDefinition(fieldName, colorRamp);
var colorizer = raster.CreateColorizer(colorizerDef);
// fix up colorizer ... due to a problem with getting the values for different attribute table fields:
// we use the Raster's attribute table to collect a dictionary with the correct replacement values
Dictionary <string, string> landuseToFieldValue = new Dictionary <string, string>();
if (colorizer is CIMRasterUniqueValueColorizer uvrColorizer)
{
var rasterTbl = raster.GetRaster().GetAttributeTable();
var cursor = rasterTbl.Search();
while (cursor.MoveNext())
{
var row = cursor.Current;
var correctField = row[fieldName].ToString();
var key = row[uvrColorizer.Groups[0].Heading].ToString();
landuseToFieldValue.Add(key.ToLower(), correctField);
}
uvrColorizer.Groups[0].Heading = fieldName;
for (var idxGrp = 0; idxGrp < uvrColorizer.Groups[0].Classes.Length; idxGrp++)
{
var grpClass = uvrColorizer.Groups[0].Classes[idxGrp];
var oldValue = grpClass.Values[0].ToLower();
var correctField = landuseToFieldValue[oldValue];
grpClass.Values[0] = correctField;
grpClass.Label = $@"{correctField}";
}
}
raster.SetColorizer(colorizer);
});
}
public static async Task SetToUniqueValueColorizer(string layerName, string styleCategory,
string styleName, string fieldName)
{
// Get the layer we want to symbolize from the map
Layer oLayer =
MapView.Active.Map.Layers.FirstOrDefault <Layer>(m => m.Name.Equals(layerName, StringComparison.CurrentCultureIgnoreCase));
if (oLayer == null)
{
return;
}
RasterLayer rasterLayer = (RasterLayer)oLayer;
StyleProjectItem style =
Project.Current.GetItems <StyleProjectItem>().FirstOrDefault(s => s.Name == styleCategory);
if (style == null)
{
return;
}
var colorRampList = await QueuedTask.Run(() => style.SearchColorRamps(styleName));
if (colorRampList == null || colorRampList.Count == 0)
{
return;
}
CIMColorRamp cimColorRamp = colorRampList[0].ColorRamp;
// Creates a new UV Colorizer Definition using the default constructor.
UniqueValueColorizerDefinition UVColorizerDef = new UniqueValueColorizerDefinition(fieldName, cimColorRamp);
// Creates a new UV colorizer using the colorizer definition created above.
CIMRasterUniqueValueColorizer newColorizer = await rasterLayer.CreateColorizerAsync(UVColorizerDef) as CIMRasterUniqueValueColorizer;
// Sets the newly created colorizer on the layer.
await QueuedTask.Run(() =>
{
rasterLayer.SetColorizer(MapTools.RecalculateColorizer(newColorizer));
});
}