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Xceed Toolkit Plus for WPF v5.1 Documentation
Xceed.Wpf.ListBox Assembly / Xceed.Wpf.Data.Stats Namespace / CountFunction Class
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    CountFunction Class
    In This Topic
    Class that represents the Count statistical function, which is the result of a tally that reveals the number of items in a set.
    Syntax
    'Declaration
 
Public Class CountFunction 
   Inherits CumulativeStatFunction
    'Usage
 
Dim instance As CountFunction
    public class CountFunction : CumulativeStatFunction
    Inheritance Hierarchy

    System.Object
       Xceed.Wpf.Data.Stats.StatFunction
          Xceed.Wpf.Data.Stats.CumulativeStatFunction
             Xceed.Wpf.Data.Stats.CountFunction

    Public Constructors
     NameDescription
    Public ConstructorCountFunction ConstructorOverloaded. Initializes a new instance of the CountFunction class.  
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    Public Properties
     NameDescription
    Public PropertyIncludeNullValuesGets or sets a value indicating whether null (Nothing in Visual Basic) and DbNull values are to be counted.  
    Public PropertyResultPropertyNameGets or sets the unique, case-sensitive property name from which the result of the statistical function can be retrieved. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Public PropertySourcePropertyNameGets or sets the name of the column whose values will be used to calculate the result of the statistical function. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
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    Protected Properties
     NameDescription
    Protected Internal PropertyIsInitializedGets a value indicating whether the Initialize method has been called, indicating that the types in which the values will be accumulated have been initialized. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Protected PropertyIsSealedGets a value indicating whether an instance of a statistical function is in an immutable state. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Protected Internal PropertyPrerequisiteFunctionsGets a list of the statistical functions whose results are required by the current function in order to calculate its own result. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Protected Internal PropertyRequiresAccumulationGets a value indicating whether the statistical function needs to accumulate its own results. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
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    Public Methods
     NameDescription
    Public MethodGetSourcePropertyNames (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
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    Protected Methods
     NameDescription
    Protected Internal MethodAccumulateOverridden. Accumulates the values required to calculate the result of the statistical function.  
    Protected Internal MethodAccumulateChildResultOverridden. Accumulates the values required to calculate the result of the statistical function from the results of a child group.  
    Protected MethodCheckSealedChecks whether an instance of a statistical function is in an immutable state. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Protected Internal MethodGetEquivalenceKeyOverridden. Retrieves a value that represents the statistical function's unique equivalence key.  
    Protected Internal MethodGetResultOverridden. Retrieves the result of the statistical function.  
    Protected MethodInitializeInitializes the statistical function specifying the types in which the values will be accumulated. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Protected Internal MethodInitializeFromInstanceOverridden. Initializes the properties of the current instance of the same-type statistical function when a new instance of the same function needs to be created.  
    Protected Internal MethodInitializePrerequisitesInitializes the prerequisite statistical functions defined by the PrerequisiteFunctions property. (Inherited from Xceed.Wpf.Data.Stats.StatFunction)
    Protected Internal MethodIsEquivalentOverridden. Retrieves a value indicating whether a statistical function is the equivalent of the current function such that both will return the same result for the same set of values.  
    Protected Internal MethodResetOverridden. Resets the statistical function to its original state.  
    Protected Internal MethodValidateOverridden. Validates the statistical function to ensure that it is able to calculate its result.  
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    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also

    Reference

    CountFunction Members
    Xceed.Wpf.Data.Stats Namespace

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