public static async Task<Raster> ApplyRasterForService(string rasterID, string theJSON_String, Raster currentRaster = null)
{
//RasterLayer rasterLayer = null;
Raster raster = null;
try
{
if (rasterID.Contains("Layout"))
{
rasterID = rasterID.Replace("_Layout", "");
}
if (MainWindow.Instance.ImageDetails3D.ContainsKey(rasterID))
{
List<object> details = MainWindow.Instance.ImageDetails3D[rasterID];
int objectID = (int)details[0];
string sensorName = (string)details[1];
string imageurl = (string)details[2];
string sceneid = (string)details[3];
ImageServiceRaster imageServiceRaster = new ImageServiceRaster(new Uri(imageurl));
await imageServiceRaster.LoadAsync();
if (imageServiceRaster.LoadStatus == Esri.ArcGISRuntime.LoadStatus.Loaded)
{
MosaicRule mosaicrule = new MosaicRule
{
MosaicMethod = MosaicMethod.LockRaster,
LockRasterIds = { objectID },
MosaicOperation = MosaicOperation.Max
};
imageServiceRaster.MosaicRule = mosaicrule;
//RasterLayer SelectedRasterLayer = new RasterLayer(imageServiceRaster);
//SelectedRasterLayer.Id = sceneid;
//SelectedRasterLayer.Name = sensorName;
//string Url = SelectedRasterLayer.Raster.Path;
//await SelectedRasterLayer.LoadAsync();
RasterFunction myRasterFunction = RasterFunction.FromJson(theJSON_String);
RasterFunctionArguments myRasterFunctionArguments = myRasterFunction.Arguments;
ReadOnlyCollection<string> myRasterNames = (ReadOnlyCollection<string>)myRasterFunctionArguments.GetRasterNames();
if (myRasterNames.Count == 0)
{
}
else
{
if (currentRaster != null)
{
myRasterFunctionArguments.SetRaster((string)myRasterNames[0], currentRaster);
}
else
myRasterFunctionArguments.SetRaster((string)myRasterNames[0], imageServiceRaster);
}
raster = new Raster(myRasterFunction);
await raster.LoadAsync();
//rasterLayer = new RasterLayer(raster);
//await rasterLayer.LoadAsync();
}
}
}
catch (Exception ex)
{
}
return raster;
}
string theJSON_String =
@"{
""raster_function_arguments"":
{
""band_ids"":{ ""int_array"":" + bandIds + @",""type"":""Raster_function_variable""},
""missing_band_action"":{ ""int"":""0"",""type"":""Raster_function_variable""},
""type"":""Raster_function_arguments"",
""raster"":{ ""name"":""$$"",""is_raster"":true,""type"":""Raster_function_variable""},
""nbits"":{ ""int"":8,""type"":""Raster_function_variable""}
},
""raster_function"":{ ""type"":""Extractband_function""},
""type"":""Raster_function_template""
}";
While loading raster, I am getting an exception of LoadError: {"A null pointer: Invalid raster function"}
What am I missing?
