一、如果【地块回退】为面, 按"DKMC"字段，在面中心配置符号Pushpin

Await QueuedTask.Run(Sub()
                         pFeaturelayer = pmap.FindLayers("地块回退").First()
                         '-----------------唯一值渲染
                         Dim Fields = New List(Of String) From {"DKMC"}   '用于检索唯一值的字段
                         '将点符号构建为模板符号
                         Dim pointSym As CIMPointSymbol = SymbolFactory.Instance.ConstructPointSymbol(ColorFactory.Instance.GreenRGB, 16.0, SimpleMarkerStyle.Pushpin)
                         Dim symbolPointTemplate As CIMSymbolReference = pointSym.MakeSymbolReference()
                         '构造唯一值呈现器的呈现器定义
                         Dim uniqueValueRendererDef As UniqueValueRendererDefinition = New UniqueValueRendererDefinition(Fields, symbolPointTemplate)
                         '创建唯一值呈现器
                         Dim uniqueValueRenderer As CIMUniqueValueRenderer = pFeaturelayer.CreateRenderer(uniqueValueRendererDef)
                         pFeaturelayer.SetRenderer(uniqueValueRenderer)
                     End Sub)

效果：

二、如果【地块回退】为面, 按"DKMC"字段，配置填充色

 Await QueuedTask.Run(Sub()
                          pFeaturelayer = pmap.FindLayers("地块回退").First()
                          '-----------------唯一值色填充渲染
                          Dim Fields = New List(Of String) From {"DKTBMC"}   '用于检索唯一值的字段
                          Dim Symbol_ps = New CIMSolidStroke()
                          With Symbol_ps
                              .Width = 1.5
                              .Color = CIMColor.CreateRGBColor(255, 0, 0, 127)
                          End With
                          Dim Symbol As CIMPolygonSymbol = SymbolFactory.Instance.ConstructPolygonSymbol(ColorFactory.Instance.GreenRGB, SimpleFillStyle.Solid, Symbol_ps）
                          Dim symbolPointTemplate As CIMSymbolReference = Symbol.MakeSymbolReference()
                          '构造唯一值呈现器的呈现器定义
                          Dim uniqueValueRendererDef As UniqueValueRendererDefinition = New UniqueValueRendererDefinition(Fields, symbolPointTemplate)
                          '创建唯一值呈现器
                          Dim uniqueValueRenderer As CIMUniqueValueRenderer = pFeaturelayer.CreateRenderer(uniqueValueRendererDef)
                          pFeaturelayer.SetRenderer(uniqueValueRenderer)
                      End Sub)

效果：