CountFunction Constructor(String,String)

Initializes a new instance of the CountFunction class specifying the unique property name from which the result of the function can be retrieved as well as the name of the column whose values will be used to calculate the result.

Syntax

Visual Basic
C#

'Declaration
 
Public Function New( _

   ByVal resultPropertyName As String, _

   ByVal sourcePropertyName As String _

)

'Usage
 
Dim resultPropertyName As String

Dim sourcePropertyName As String

 

Dim instance As New CountFunction(resultPropertyName, sourcePropertyName)

public CountFunction( 

   string resultPropertyName,

   string sourcePropertyName

)

Parameters

resultPropertyName: The unique, case-sensitive property name from which the result of the function can be retrieved.
sourcePropertyName: The name of the column whose values will be used to calculate the result. The provided name must correspond to the FieldName property of a column.

Remarks

Any a null reference (Nothing in Visual Basic) and DbNull values will be excluded from the count. To include them, the IncludeNullValues must be set to true,

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

Reference

CountFunction Class
CountFunction Members
Overload List