Package	mx.collections
Class	public class SummaryField2
Inheritance	SummaryField2 Object

Note: In the previous release of Flex, you used the SummaryField class to create summary data. The SummaryField2 class is new for Flex 4 and provides better performance than SummaryField.

Use the dataField property to specify the data field used to generate the summary, the label property to specify the name of the data field created to hold the summary data, and the summaryOperation property to specify how to create the summary for numeric fields. You can specify one of the following values: SUM, MIN, MAX, AVG, or COUNT.

The following example creates summary rows based on two fields of the data provider of the AdvancedDataGrid control:

  <mx:AdvancedDataGrid id="myADG" 
    initialize="gc.refresh();"> 
    <mx:dataProvider>
      <mx:GroupingCollection id="gc" source="{dpFlat}">
        <mx:Grouping>
          <mx:GroupingField name="Region">
            <mx:summaries>
              <mx:SummaryRow summaryPlacement="group">
                <mx:fields>
                  <mx:SummaryField2 dataField="Actual" 
                    label="Min Actual" summaryOperation="MIN"/>
                  <mx:SummaryField2 dataField="Actual" 
                    label="Max Actual" summaryOperation="MAX"/>
                </mx:fields>
              </mx:SummaryRow>
            </mx:summaries>
          </mx:GroupingField>
          <mx:GroupingField name="Territory">
            <mx:summaries>
              <mx:SummaryRow summaryPlacement="group">
                <mx:fields>
                  <mx:SummaryField2 dataField="Actual" 
                    label="Min Actual" summaryOperation="MIN"/>
                  <mx:SummaryField2 dataField="Actual" 
                    label="Max Actual" summaryOperation="MAX"/>
                </mx:fields>
              </mx:SummaryRow>
            </mx:summaries>
          </mx:GroupingField>
        </mx:Grouping>
      </mx:GroupingCollection>
    </mx:dataProvider> 
 
    <mx:columns>
      <mx:AdvancedDataGridColumn dataField="Region"/>
      <mx:AdvancedDataGridColumn dataField="Territory_Rep"
        headerText="Territory Rep"/>
      <mx:AdvancedDataGridColumn dataField="Actual"/>
      <mx:AdvancedDataGridColumn dataField="Estimate"/>
      <mx:AdvancedDataGridColumn dataField="Min Actual"/>
      <mx:AdvancedDataGridColumn dataField="Max Actual"/>
    </mx:columns>
  </mx:AdvancedDataGrid>
  

Show MXML Syntax

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  <mx:SummaryField2
  Properties 
    dataField="No default"
    label="No default"
    summaryOperation="SUM"
  />
  

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