DevExpress PivotControl关联ChartControl
Integration with the Chart Control
The Pivot Grid presents multidimensional data in a cross-tabular form, allowing end-users to perform various data shaping operations.
以交叉表的形式展示多维数据, 允许用户显示数据变形.
They can customize the report to reshape data and get a layout that fits their specific data analysis needs.
Pivot Grid control allows end-users to go further and visualize data displayed in the pivot grid using the Chart Control.
Note
Watch the Video DevExpress WinForms Pivot Grid: Integration with Chart Control (YouTube)
This topic contains the following sections.
Binding Overview 如何绑定
The ChartControl retrieves data from the Pivot Grid control in the following manner.
- The Series data member values are generated based on Pivot Grid control columns.
- The argument data member values are generated based on Pivot Grid control rows.
- The Value data member contains summary values.
Series and argument data members are created based on column/row headers (e.g., '1994', 'Produce Total', 'Grand Total').
If a column/row is identified by multiple fields, the corresponding data member value is constructed from the respective field values connected by the '|' sign (e.g., '1995 | January', 'Beverages | Chai').
Implementation
To set a Pivot Grid control as the Chart control data source, do one of the following:
-
At design-time, click the Chart control smart tag and select the PivotGridControl instance from the Choose Data Source drop-down list:
- Assign the PivotGridControl instance to the ChartControl.DataSource property.
By default, the ChartControl visualizes data that is selected in the Pivot Grid control. To display all the data in the Pivot Grid control, set the PivotGridOptionsChartDataSource.SelectionOnly property to false.
To change the default behavior in order to create a series data member based on rows and an argument data member based on columns, set the PivotGridOptionsChartDataSourceBase.ProvideDataByColumns property to false.
Note
Use the PivotGridOptionsChartDataSourceBase.DataProvideMode property to control whether or not Pivot Grid control should pass to Chart control only values from the lowest aggregation level.
Binding and Layout Options
When the PivotGridControl instance is assigned to the ChartControl.DataSource property, the chart bindings and layout are auto-adjusted. If necessary, you can manually specify ChartControl binding settings that define how to create a diagram from supplied data.
There are two modes of providing binding settings to ChartControl: automatic and manual. You can specify which one to use via the ChartControl.AutoBindingSettingsEnabled property.
- In automatic mode (the ChartControl.AutoBindingSettingsEnabled property is set to true), binding settings are automatically adjusted. In this instance, Chart control uses the data source series, argument and value data members to create series, arguments and values, respectively. You can manually adjust automatically applied binding settings by handling the ChartControl.CustomizeAutoBindingSettings event. This event occurs after automatic settings have been applied to a chart data source.
- In manual mode (the ChartControl.AutoBindingSettingsEnabled property is set to false), you need to specify which data member should be used to create series via the ChartControl.SeriesDataMember property. Then use the SeriesBase.ArgumentDataMember and SeriesBase.ValueDataMembers properties of the ChartControl.SeriesTemplate object to specify which data members should be used to create arguments and values, respectively. Use the 'Series', 'Arguments' and 'Values' strings to refer to corresponding data members stored in the data source.
When binding settings are applied, you can manually specify layout settings that define how to display a diagram. As with binding settings, you can let ChartControl adjust these settings automatically (in this instance, you can manually customize them by handling various events) or specify them manually. Use the ChartControl.AutoLayoutSettingsEnabled property to specify whether or not layout settings are automatically adjusted.
For a list of binding and layout settings, see the Pivot Charting topic in the XtraCharts Suite documentation.
Data Types Specifics
If a Pivot Grid control contains multiple data fields with different data types (PivotGridField.DataType), Cell values are converted to System.Decimal (if possible). Use the PivotGridOptionsChartDataSourceBase.ProvideCellValuesAsType property to override this behavior by explicitly specifying a data type to which Cell values should be converted.
Chart control supports only Numeric and DateTime series point values (see Series Scale Types to learn more). To convert cell values into an appropriate type in a custom manner, handle the PivotGridControl.CustomChartDataSourceData event.
When choosing a Chart type, note that only Series with a single value per Series point are supported.
Member Table
The Pivot Grid control provides multiple options that enable you to specify how its data is interpreted by the ChartControl. These options are represented by a PivotGridOptionsChartDataSource class instance, and accessed via the PivotGridControl.OptionsChartDataSource property.
| Property | Description |
|---|---|
| PivotGridOptionsChartDataSourceBase.ProvideDataByColumns | Gets or sets whether series in a chart control are created for PivotGrid columns or rows. |
| PivotGridOptionsChartDataSource.SelectionOnly | Gets or sets whether a chart control must display selected cells or all the data of the PivotGrid control. |
| PivotGridOptionsChartDataSourceBase.ProvideEmptyCells | Gets or sets whether empty cells should be processed by the Chart control. |
| PivotGridOptionsChartDataSourceBase.DataProvideMode | Gets or sets what data the pivot grid should pass to a bound chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideColumnCustomTotals | Gets or sets whether column custom totals should be passed to a chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideColumnGrandTotals | Gets or sets whether column grand totals are passed to a chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideRowCustomTotals | Gets or sets whether row custom totals should be displayed in a chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideRowGrandTotals | Gets or sets whether row grand totals are passed to a chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideRowTotals | Gets or sets whether row Totals are passed to a chart control. |
| PivotGridOptionsChartDataSourceBase.FieldValuesProvideMode | Gets or sets how field values are passed to the chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideCellValuesAsType | Gets or sets the type to which cell values are converted, before they are exported to the Chart Control. |
| PivotGridOptionsChartDataSourceBase.ProvideColumnFieldValuesAsType | Gets or sets the type to which the column field values are converted before they are exported to the chart control. |
| PivotGridOptionsChartDataSourceBase.ProvideRowFieldValuesAsType | Gets or sets the type to which the row field values are converted, before they are exported to the chart control. |
| PivotGridOptionsChartDataSourceBase.MaxAllowedPointCountInSeries | Gets or sets the maximum number of points allowed in a series. |
| PivotGridOptionsChartDataSourceBase.MaxAllowedSeriesCount | Gets or sets the maximum number of series allowed in the chart data source. |
| PivotGridOptionsChartDataSource.UpdateDelay | Gets or sets the delay between changing the cell focus or selection, and updating the bound Chart control. |
Note
Note that PivotGridOptionsChartDataSourceBase.Provide...Totals properties is in effect when the PivotGridOptionsChartDataSourceBase.DataProvideMode is set to the PivotChartDataProvideMode.UseCustomSettings.
Example
