Class

LocalDataSourceProvider

Initializes a new instance of the LocalDataSourceProvider class with default pivot engine. Sets up the provider for processing local data sources with in-memory pivot operations and drill-down support.

Declaration

public LocalDataSourceProvider()

Gets a collection of LocalAggregateDescription objects that specify how data should be aggregated within the intersection of row and column groups. These define the calculated values displayed in pivot cells using various aggregate functions like Sum, Count, Average, etc.

Declaration

public Collection<LocalAggregateDescription> AggregateDescriptions { get; }

Property Value

Gets a collection of CalculatedField objects that define calculated aggregate values. Calculated fields allow creating custom expressions and formulas that can be used as aggregate values in the pivot, providing advanced computation capabilities beyond standard aggregate functions.

Declaration

public Collection<CalculatedField> CalculatedFields { get; }

Property Value

Gets a collection of PropertyGroupDescriptionBase objects that specify how the pivot data should be grouped by columns. Column groupings create the hierarchical structure displayed at the top of the pivot grid using object properties.

Declaration

public Collection<PropertyGroupDescriptionBase> ColumnGroupDescriptions { get; }

Property Value

Gets or sets the CultureInfo used for grouping, formatting, and sorting operations. This culture affects how data is grouped, displayed, and compared in different locales.

Declaration

public CultureInfo Culture { get; set; }

Property Value

Gets or sets a value indicating whether nested properties of objects in the ItemsSource should be displayed in a hierarchical structure. When enabled, complex object properties are shown as expandable tree nodes in the field list.

Declaration

public bool EnableHierarchy { get; set; }

Property Value

Gets a collection of PropertyFilterDescriptionBase objects that specify how pivot items should be filtered. Filters are applied to restrict which data items are included in pivot calculations and display.

Declaration

public Collection<PropertyFilterDescriptionBase> FilterDescriptions { get; }

Property Value

Gets or sets the data source for pivot operations. This can be any IEnumerable collection such as IList, Array, ObservableCollection, or other enumerable data sources containing the objects to be analyzed and grouped in the pivot.

Declaration

public object ItemsSource { get; set; }

Property Value

Gets the current pivot calculation results containing the processed data from the local data source. This property provides access to the aggregated and grouped data ready for display in pivot controls.

Declaration

protected override IPivotResults Results { get; }

Property Value

Overrides DataProviderBase.Results

Gets a collection of PropertyGroupDescriptionBase objects that specify how the pivot data should be grouped by rows. Row groupings create the hierarchical structure displayed on the left side of the pivot grid using object properties.

Declaration

public Collection<PropertyGroupDescriptionBase> RowGroupDescriptions { get; }

Property Value

Gets the current state object representing the items source for this data provider. This state is used for field description retrieval and data source management.

Declaration

public override object State { get; }

Property Value

Overrides DataProviderBase.State

Blocks the calling thread until the current refresh operation completes. For local data source provider, this waits for the parallel processing engine to complete all operations.

Declaration

public override void BlockUntilRefreshCompletes()

Overrides DataProviderBase.BlockUntilRefreshCompletes()

Creates a field description provider for retrieving metadata and field information from the local data source. This provider analyzes object properties to discover available fields for pivot operations.

Declaration

protected override IFieldDescriptionProvider CreateFieldDescriptionsProvider()

Returns

Overrides DataProviderBase.CreateFieldDescriptionsProvider()

Creates an aggregate description for the specified field that can be used in local data source pivot operations. The description is configured based on the field type, using appropriate aggregate functions for numeric vs non-numeric data.

Declaration

protected override IAggregateDescription GetAggregateDescriptionForFieldDescriptionCore(IPivotFieldInfo description)

Parameters

Returns

Exceptions

Overrides DataProviderBase.GetAggregateDescriptionForFieldDescriptionCore(IPivotFieldInfo)

Creates a filter description for the specified field that can be used in local data source filtering operations. The description is configured with the field name for property-based filtering.

Declaration

protected override FilterDescription GetFilterDescriptionForFieldDescriptionCore(IPivotFieldInfo description)

Parameters

Returns

Exceptions

Overrides DataProviderBase.GetFilterDescriptionForFieldDescriptionCore(IPivotFieldInfo)

Creates a group description for the specified field that can be used in local data source pivot grouping operations. The description type is chosen based on the field data type, supporting numeric ranges, date/time steps, and property grouping.

Declaration

protected override IGroupDescription GetGroupDescriptionForFieldDescriptionCore(IPivotFieldInfo description)

Parameters

Returns

Exceptions

Overrides DataProviderBase.GetGroupDescriptionForFieldDescriptionCore(IPivotFieldInfo)

Extracts the underlying data items for the specified row and column group intersection. This method provides drill-down functionality to access the detailed data behind pivot aggregates.

Declaration

public void GetUnderlyingData(IGroup rowGroup, IGroup columnGroup)

Parameters

Implements IUnderlyingDataProvider.GetUnderlyingData(IGroup, IGroup)

Performs the core refresh operation by processing the local data source, initializing descriptions, and executing pivot calculations. This method handles field initialization and pivot engine execution.

Declaration

protected override void RefreshOverride()

Overrides DataProviderBase.RefreshOverride()

Occurs when the underlying data extraction for drill-down operations is completed. This event provides access to the detailed data behind specific pivot intersections.

Declaration

public event EventHandler<DrillDownCompletedEventArgs> GetUnderlyingDataCompleted

Event Value

Implements IUnderlyingDataProvider.GetUnderlyingDataCompleted