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      Examples: Calculating Summaries
      How to: Add Multiple Total Summaries for Column
      How To: Calculate Custom Summaries Based on Column Summary Items
      How to: Calculate Single Total Summary for Grid's Column
      How to: Create Group Summaries
      How to: Sort Group Rows by Summary Values
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How To: Calculate Custom Summaries Based on Column Summary Items

This example illustrates how to utilize values from multiple grid column summary fields to calculate a value for a custom summary item.

The sample grid control contains two numeric columns. The first column has only one summary item. To set a single summary item for a column, use the GridColumn.SummaryItem property.

The second column has more than one summary item. For such columns, use the GridColumn.Summary collection instead of the GridColumn.SummaryItem property.

The code above adds three summary fields. Two of them are auto-calculated and display the maximum column value and total records count. The last summary item has its SummaryItemType property set to Custom. Custom summaries receive their values on the GridView.CustomSummaryCalculate event. The code below illustrates how to handle this event to retrieve auto-calculated summary values. Based on these values, the value for the custom summary field is calculated.

Complete example code is shown below.

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