Public Overloads Sub Filter( _
   ByVal compareMethod As CompareMethod, _
   ByVal compareValue As Double, _
   ByVal inputSeriesNames As String, _
   ByVal outputSeriesNames As String _
) 

Visual Basic (Usage)	Copy Code
Dim instance As DataManipulator Dim compareMethod As CompareMethod Dim compareValue As Double Dim inputSeriesNames As String Dim outputSeriesNames As String   instance.Filter(compareMethod, compareValue, inputSeriesNames, outputSeriesNames)

public void Filter( 
   CompareMethod compareMethod,
   double compareValue,
   string inputSeriesNames,
   string outputSeriesNames
)

Parameters

compareMethod

A CompareMethod enumeration value that determines the comparison method for the filtering rule. Can be "less than", "equal to", etc. .
Value comparing method.

compareValue

The value of the filtering rule that the first Y-value of data points is compared to.
Value to compare with.

inputSeriesNames

The name(s) of the series that will be filtered. For multiple series use a comma-separated list of names, and make sure that the series are aligned. An asterisk (*) may be used to filter all series in the series collection (in which case the outputSeriesName parameter must be empty)
Comma separated input series names.

outputSeriesNames

The name(s) of the series that store the filtered data. Make sure that the number of output series matches the number of input series, otherwise an exception will be thrown.
Comma separated output series names.

This method filters data points by applying a filtering rule, which is composed of an operator and a value (e.g. "< 5", "= 2.7", etc.). Data points are filtered using the first Y-value of the first series' points, and by default if points match this filtering rule then all corresponding points from all series are deleted.

Filtering should only be applied to multiple series that are aligned, otherwise an exception will be thrown (for information concerning alignment of data see the Aligning Data topic). Note also that multiple series are filtered using the first Y-value from the FIRST specified series. If two series must be filtered independently call the Filter method twice using one series as a parameter.

If a specified output series has not been created and added to the SeriesCollection when this function call is made it will be created and added to the collection automatically, and have default Series properties (e.g. column chart type, etc.). In addition, the ChartArea property of the series is set to "Default", and if a chart area with the name "Default" exists in the ChartAreasCollection it will be used to draw the chart. If there is no chart area with this name the first ChartArea object in the collection will be used to display the series.

Filtered points can be either removed from a series (default) or displayed as empty points, depending on the FilterSetEmptyPoints value.

Points can also be marked as filtered if they DO NOT match filtering criteria (determined by the FilterMatchPoints value).

Filters are always applied to an entire series.

To filter other values of data points (e.g. the second Y-value, etc.) use one of the function definitions that has a usingValue parameter.

To filter data and only keep a specified number of highest or lowest values use the FilterTopN method instead.

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

Reference