/// /// You must call this method on the MCT! /// /// private CIMRenderer CreateUniqueValueRendererUsingColorTable(FeatureLayer lyrToColor, StandaloneTable colorTable) { //All of these methods have to be called on the MCT if (OnUIThread) throw new ArcGIS.Core.CalledOnWrongThreadException(); //make a dictionary with MapUnit and Color var dicMapUnitColor = new Dictionary<int, string>(); using (var rowCursor = colorTable.Search()) { while (rowCursor.MoveNext()) { using (var anyRow = rowCursor.Current) { dicMapUnitColor.Add((int)anyRow["MapUnit"], anyRow["Color"].ToString()); } } } //Create the Unique Value Renderer CIMUniqueValueRenderer uniqueValueRenderer = new CIMUniqueValueRenderer() { // set the value field Fields = new string[] { "MapUnit" } }; //Construct the list of UniqueValueClasses Listclasses = new List (); //define the unique values for each dicMapUnitColor entry foreach (var key in dicMapUnitColor.Keys) { var lstValue = new List () { new CIMUniqueValue() { FieldValues = new string[] { key.ToString() } } }; var namedColor = System.Drawing.Color.FromName(dicMapUnitColor[key]); var theColor = CIMColor.CreateRGBColor(namedColor.R, namedColor.G, namedColor.B); classes.Add( new CIMUniqueValueClass() { Values = lstValue.ToArray(), Label = $@"Color: {dicMapUnitColor[key]}", Visible = true, Editable = true, Symbol = new CIMSymbolReference() { Symbol = SymbolFactory.Instance.ConstructPointSymbol( SymbolFactory.Instance.ConstructMarker(theColor, 20, SimpleMarkerStyle.Pushpin)) } } ); } //Add the classes to a group (by default there is only one group or "symbol level") // Unique value groups CIMUniqueValueGroup groupOne = new CIMUniqueValueGroup() { Heading = "By Color", Classes = classes.ToArray() }; uniqueValueRenderer.Groups = new CIMUniqueValueGroup[] { groupOne }; //Draw the rest with the default symbol uniqueValueRenderer.UseDefaultSymbol = true; uniqueValueRenderer.DefaultLabel = "All other values"; var defaultColor = CIMColor.CreateRGBColor(215, 215, 215); uniqueValueRenderer.DefaultSymbol = new CIMSymbolReference() { Symbol = SymbolFactory.Instance.ConstructPointSymbol( SymbolFactory.Instance.ConstructMarker(defaultColor, 15, SimpleMarkerStyle.Diamond)) }; return uniqueValueRenderer as CIMRenderer; }
Original: https://www.cnblogs.com/gisoracle/p/16271588.html
Author: gisoracle
Title: ArcGIS Pro属性颜色符号化
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