Filter Summaries | DataFilter for WinForms

Filter Summaries

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DataFilter control allows you to configure the Checklist filter to implement the filter summaries using AggregateType property by assigning AggregateType Enum. The feature makes it easier for you to analyze the count, sum, maximum and minimum values of the filter items.

Let us take a use case to display count and maximum values of the filter items in a checklist filter. In the image and example below, count of the individual filter items of the Brand filter are listed and maximum price values for the filter items in the Category filter are listed.

Filter Summaries

You can use the following code to display the count of the filter items and the maximum value of a filter item corresponding to the data as shown in the above example using AggregateType property.

private void c1DataFilter1_FilterAutoGenerating(object sender, C1.DataFilter.FilterAutoGeneratingEventArgs e)
{
  switch (e.Property.Name)
  {
    //Set the checklist items for Brand filter
    case "Brand":
    brandFilter = (C1.Win.DataFilter.ChecklistFilter)e.Filter;
    brandFilter.ItemsSource = c1NWindDataSet.Cars;
    brandFilter.ValueMemberPath = "Brand";

    //Define the summary for the Checklist filter defined for Brand Field.
    //This summary displays the count of cars available for each brand.
    brandFilter.FilterSummary.AggregateType = AggregateType.Count;
    brandFilter.FilterSummary.Label = "Count";
    brandFilter.FilterSummary.PropertyName = "Brand";
    //Select all the filter items
    brandFilter.SelectAll();
    break;

    //Set the checklist items for Category filter
    case "Category":
    var categoryFilter = (C1.Win.DataFilter.ChecklistFilter)e.Filter;
    categoryFilter.ItemsSource = c1NWindDataSet.Cars;
    categoryFilter.ValueMemberPath = "Category";
    //Define the summary for the Checklist filter defined for Category Field.
    //This summary displays the maximum price of cars for the specific category.
    categoryFilter.FilterSummary.AggregateType = AggregateType.Max;
    categoryFilter.FilterSummary.Label = "Max";
    categoryFilter.FilterSummary.PropertyName = "Price";

    //Select all the filter items
    categoryFilter.SelectAll();
    break;

    //Set the minimum/maximum value for the Price filter
    case "Price":
    var priceFilter = (C1.Win.DataFilter.RangeFilter)e.Filter;
    priceFilter.Maximum = c1NWindDataSet.Cars.AsEnumerable().Max(x => x.Field<double>("Price"));
    priceFilter.Minimum = c1NWindDataSet.Cars.AsEnumerable().Min(x => x.Field<double>("Price"));
    priceFilter.Increment = 1000;
    priceFilter.Digits = 0;
    break;
    //Cancels the creation of all other filters
    default:
    e.Cancel = true;
    break;
   }
}