![](dotnetdiagramimages/MESCIUS_ActiveReports_Core_Rendering_GrapeCity_DataVisualization_Options__NumberConverter.png)
'宣言
Public Class _NumberConverter Inherits GrapeCity.DataVisualization.Options.JsonConverter(Of Nullable(Of Double))
public class _NumberConverter : GrapeCity.DataVisualization.Options.JsonConverter<Nullable<double>>
System.Object
GrapeCity.DataVisualization.Options.JsonConverter<T>
GrapeCity.DataVisualization.Options._NumberConverter