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This example demonstrates how to show the products with top N sales by category.

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DevExpress-Examples/winforms-dashboard-w-function-example

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Dashboard for WinForms - How to Use the W Function to Show Top N Products by Category

This example demonstrates how to show the products with top N sales by category.

The dashboard contains calculated fields with the following expressions:

Field Expression
ProductRankInCategory aggr(w(RankDense(Sum([ProductSales]), 'desc'), PartitionBy([CategoryName]), OrderBy()), [CategoryName], [ProductName])

The grid shows the products with the ProductRankInCategory value that is more or equal to the parameter value (default value is 2).

Grid rows in the Top Products and OTHERS are sorted by the TopNProductsSortOrder calculated field for proper arrangement.

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