Properties feature layer

316
2
10-25-2021 02:47 AM
DavidMrázek
Occasional Contributor II

Hello,

is there a possibility to set that the line will have certain properties (size, color) when creating new layers (polyline)?

 

protected override async void OnClick()
        {

           await CreateMyLineAsync();
        }

        private static async Task CreateMyLineAsync()
        {


            var name = "Linie";
            EnumFeatureClassType type = EnumFeatureClassType.POLYLINE;
           await CreateLayer(name, type);
            await QueuedTask.Run(async () =>
                {
            GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
            {
                SymbolTemplate = SymbolFactory.Instance
                    .ConstructLineSymbol(ColorFactory.Instance.GreenRGB, 20, SimpleLineStyle.Solid)
                    .MakeSymbolReference(),

            };
            var fcLayer = MapView.Active.Map.GetLayersAsFlattenedList().Where(l => l.Name == "Linie").FirstOrDefault() as FeatureLayer;
            await SelectLayer(fcLayer, @"D:\featLToFeatC.shp");
                   LayerFactory.Instance.CreateFeatureLayer(new Uri(@"C:\Users\mrazekd\Desktop\Vyber.gdb"),
                     MapView.Active.Map, layerName:"Linie",rendererDefinition: gcDef);
                });
        }

        private static async Task SelectLayer(FeatureLayer featureLayer,  string Output)
        {
            var parameters = Geoprocessing.MakeValueArray(featureLayer, Output);
            var selectLayer = "conversion.FeatureClassToFeatureClass";
            await  FunctionPart(selectLayer, parameters);
        }

        private static async Task FunctionPart(string stringFunc, IReadOnlyList<string> parameters)
        {
            try
            {
                await Geoprocessing.ExecuteToolAsync(stringFunc, parameters).ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.ToString(), Assembly.GetExecutingAssembly().FullName);
                throw;
            }
        }


        private enum EnumFeatureClassType
        {
            POINT,
            MULTIPOINT,
            POLYGON,
            POLYLINE

        }

        private static async Task CreateLayer(string fcName, EnumFeatureClassType fcType)
        {

            await CreateFeatureClass(fcName, fcType);

            var fcLayer = MapView.Active.Map.GetLayersAsFlattenedList().Where(l => l.Name == fcName).FirstOrDefault() as BasicFeatureLayer;
            if (fcLayer == null)
            {
                MessageBox.Show($@"Nelze najít {fcName} v této mapě");
                return;
            }
            {

                var dataSource = await GetDataSource(fcLayer);
                Debug.WriteLine($@"{dataSource} bylo nalezeno ... přidej pole");
                await ExecuteAddFieldToolAsync(fcLayer,
                            new KeyValuePair<string, string>("Description", "Desc."), "Text", 50);
            }
        }
        private static async Task CreateFeatureClass(string featureclassName, EnumFeatureClassType featureclassType)
        {

            List<object> arguments = new List<object>
                        {

                            CoreModule.CurrentProject.DefaultGeodatabasePath,

                            featureclassName,

                            featureclassType.ToString(),

                            "",

                            "DISABLED",

                            "DISABLED"
                        };
            await QueuedTask.Run(() =>
            {
                arguments.Add(SpatialReferenceBuilder.CreateSpatialReference(5514));
            });
            await Geoprocessing.ExecuteToolAsync("CreateFeatureclass_management", Geoprocessing.MakeValueArray(arguments.ToArray()));
        }
        private static async Task<string> GetDataSource(BasicFeatureLayer theLayer)
        {
            try
            {
                return await QueuedTask.Run(() =>
                {
                    var inTable = theLayer.Name;
                    var table = theLayer.GetTable();
                    var dataStore = table.GetDatastore();
                    var workspaceNameDef = dataStore.GetConnectionString();
                    var workspaceName = workspaceNameDef.Split('=')[1];
                    var fullSpec = Path.Combine(workspaceName, inTable);
                    return fullSpec;
                });
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return string.Empty;
            }
        }
        private static async Task<string> ExecuteAddFieldToolAsync(
            BasicFeatureLayer theLayer,
            KeyValuePair<string, string> field,
            string fieldType, int? fieldLength = null,
            bool isNullable = true)
        {
            return await QueuedTask.Run(() =>
            {
                try
                {
                    var inTable = theLayer.Name;
                    var table = theLayer.GetTable();
                    var dataStore = table.GetDatastore();
                    var workspaceNameDef = dataStore.GetConnectionString();
                    var workspaceName = workspaceNameDef.Split('=')[1];

                    var fullSpec = Path.Combine(workspaceName, inTable);
                    Debug.WriteLine($@"Přidat {field.Key} z {fullSpec}");

                    var parameters = Geoprocessing.MakeValueArray(fullSpec, field.Key, fieldType.ToUpper(), null, null,
                        fieldLength, field.Value, isNullable ? "NULABLE" : "NON_NULLABLE");
                    var cts = new CancellationTokenSource();
                    var results = Geoprocessing.ExecuteToolAsync("management.AddField", parameters, null, cts.Token,
                        (eventName, o) =>
                        {
                            Debug.WriteLine($@"GP event: {eventName}");
                        });
                    var isFailure = results.Result.IsFailed || results.Result.IsCanceled;
                    return !isFailure ? "Chyba" : "Ok";
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                    return ex.ToString();
                }
            });
        }

 

 

Thank you for any advice or ideas

Thanks

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2 Replies
Wolf
by Esri Regular Contributor
Esri Regular Contributor

You can create a feature layer using the feature class and the renderer as parameters of the CreateFeatureLayer function as shown here:

ArcGIS Pro 2.8 API Reference Guide - CreateFeatureLayer(Uri,ILayerContainerEdit,LayerPosition,String...

This is the sample snippet demonstrating the usage:

string colorBrewerSchemesName = "ColorBrewer Schemes (RGB)";
StyleProjectItem style = Project.Current.GetItems<StyleProjectItem>().First(s => s.Name == colorBrewerSchemesName);
string colorRampName = "Greens (Continuous)";
IList<ColorRampStyleItem> colorRampList = await QueuedTask.Run(() =>
{
  return style.SearchColorRamps(colorRampName);
});
ColorRampStyleItem colorRamp = colorRampList[0];

await QueuedTask.Run(() =>
{
  GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
  {
    ClassificationField = "CROP_ACR07",
    ClassificationMethod = ArcGIS.Core.CIM.ClassificationMethod.NaturalBreaks,
    BreakCount = 6,
    ColorRamp = colorRamp.ColorRamp,
    SymbolTemplate = SymbolFactory.Instance.ConstructPolygonSymbol(
                            ColorFactory.Instance.GreenRGB, SimpleFillStyle.Solid, null).MakeSymbolReference(),
    ExclusionClause = "CROP_ACR07 = -99",
    ExclusionSymbol = SymbolFactory.Instance.ConstructPolygonSymbol(
                            ColorFactory.Instance.RedRGB, SimpleFillStyle.Solid, null).MakeSymbolReference(),
    ExclusionLabel = "No yield",
  };

  LayerFactory.Instance.CreateFeatureLayer(new Uri(@"c:\Data\CountyData.gdb\Counties"),
            MapView.Active.Map, layerName: "Crop", rendererDefinition: gcDef);
});

Please note that CreateFeatureLayer is overloaded allowing for different options.

DavidMrázek
Occasional Contributor II

Hi Wolf,


@Wolf wrote:

You can create a feature layer using the feature class and the renderer as parameters of the CreateFeatureLayer function as shown here:

ArcGIS Pro 2.8 API Reference Guide - CreateFeatureLayer(Uri,ILayerContainerEdit,LayerPosition,String...

This is the sample snippet demonstrating the usage:

 

string colorBrewerSchemesName = "ColorBrewer Schemes (RGB)";
StyleProjectItem style = Project.Current.GetItems<StyleProjectItem>().First(s => s.Name == colorBrewerSchemesName);
string colorRampName = "Greens (Continuous)";
IList<ColorRampStyleItem> colorRampList = await QueuedTask.Run(() =>
{
  return style.SearchColorRamps(colorRampName);
});
ColorRampStyleItem colorRamp = colorRampList[0];

await QueuedTask.Run(() =>
{
  GraduatedColorsRendererDefinition gcDef = new GraduatedColorsRendererDefinition()
  {
    ClassificationField = "CROP_ACR07",
    ClassificationMethod = ArcGIS.Core.CIM.ClassificationMethod.NaturalBreaks,
    BreakCount = 6,
    ColorRamp = colorRamp.ColorRamp,
    SymbolTemplate = SymbolFactory.Instance.ConstructPolygonSymbol(
                            ColorFactory.Instance.GreenRGB, SimpleFillStyle.Solid, null).MakeSymbolReference(),
    ExclusionClause = "CROP_ACR07 = -99",
    ExclusionSymbol = SymbolFactory.Instance.ConstructPolygonSymbol(
                            ColorFactory.Instance.RedRGB, SimpleFillStyle.Solid, null).MakeSymbolReference(),
    ExclusionLabel = "No yield",
  };

  LayerFactory.Instance.CreateFeatureLayer(new Uri(@"c:\Data\CountyData.gdb\Counties"),
            MapView.Active.Map, layerName: "Crop", rendererDefinition: gcDef);
});

 

Please note that CreateFeatureLayer is overloaded allowing for different options.


 

In the section:

LayerFactory.Instance.CreateFeatureLayer (new Uri (@ "c: \ Data \ CountyData.gdb \ Counties"), MapView.Active.Map, layerName: "Lines", rendererDefinition: gcDef);

the program throws an error message:

'Failed to add data, unsupported data type. c: \ Data \ CountyData.gdb \ Counties'

Why? It's a completely new sobour, isn't it?

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