Nevron .NET Vision Documentation
Sorting

Sorting changes the order of the data series items according to some criterion. Ascending, descending or custom sort orders can be used. The user can sort individual data series or collection of data series.

Sorting individual data series

Two methods of the NDataSeries class can help you sort the items of an individual data series. The first variant of the Sort method receives a parameter of type DataSeriesSortOrder which has the following fields:

Ascending
Descending

The following example will sort the Values data series of a bar series:

C#
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bar.Values.Sort(DataSeriesSortOrder.Ascending);
Visual Basic
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bar.Values.Sort(DataSeriesSortOrder.Ascending)

It is important to remember that only the data series of type Double or String can be sorted with the first variant of the Sort method. If you attempt to perform the default Sort operation on a data series with different data type the function will throw an exception.

The second variant of the sort method lets you specify a custom comparer class. For example you can implement a custom comparer for complex types as fill styles.

Sorting collections of data series

The Sort methods of the NDataSeriesCollection class allow a set of aligned data series to be sorted simultaneously. One of the data series in the collection is used as a key for sorting. The other data series are reordered accordingly. The following code will create a data series collection containing the values, labels and fill styles of a series.

C#
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NDataSeriesCollection dataSeriesCollection = new NDataSeriesCollection();
dataSeriesCollection.Add(series.Values);
dataSeriesCollection.Add(series.Labels);
dataSeriesCollection.Add(series.FillStyles);
Visual Basic
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Dim dataSeriesCollection As NDataSeriesCollection = New NDataSeriesCollection()
dataSeriesCollection.Add(series.Values)
dataSeriesCollection.Add(series.Labels)
dataSeriesCollection.Add(series.FillStyles)

Now that the collection is created you can perform sorting on the values or labels data series:

C#
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// sort all data series in the collection on the values
dataSeriesCollection.Sort(0, DataSeriesSortOrder.Ascending);

// sort all data series in the collection on the labels
dataSeriesCollection.Sort(1, DataSeriesSortOrder.Ascending);
Visual Basic
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' sort all data series in the collection on the values
dataSeriesCollection.Sort(0, DataSeriesSortOrder.Ascending)

' sort all data series in the collection on the labels
dataSeriesCollection.Sort(1, DataSeriesSortOrder.Ascending)

If you want to sort the collection using the fill styles as a key, you have to use the second overload of the Sort method and specify a custom comparer.

Related Examples
Windows forms: All Examples\Data Manipulation\Sorting
See Also

 

 


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