CollectionFactoryExpressionExtensions.AddFor<TRow, TColumn, TDisplayColumn>(CollectionFactory<DataGridSummaryGroupItemBuilder<TRow>>, Expression<Func<TRow, TColumn>>, Expression<Func<TRow, TDisplayColumn>>) Method

Adds a group summary item to a specific column of a strongly-typed DataGrid.

Namespace: DevExtreme.AspNet.Mvc

Assembly: DevExtreme.AspNet.Core.dll

Declaration

public static DataGridSummaryGroupItemBuilder<TRow> AddFor<TRow, TColumn, TDisplayColumn>(
    this CollectionFactory<DataGridSummaryGroupItemBuilder<TRow>> factory,
    Expression<Func<TRow, TColumn>> column,
    Expression<Func<TRow, TDisplayColumn>> displayColumn
)

Parameters

Name	Type	Description
factory	CollectionFactory<DataGridSummaryGroupItemBuilder<TRow>>	The DataGrid summary item collection factory.
column	Expression<Func<TRow, TColumn>>	A strongly-typed lambda expression. Returns a model property that supplies data to a summary item.
displayColumn	Expression<Func<TRow, TDisplayColumn>>	A strongly-typed lambda expression. Returns a model property that corresponds to the column where a summary item should be displayed.

Type Parameters

Name	Description
TRow	The model type of the strongly-typed DataGrid.
TColumn	The type of the expression result.
TDisplayColumn	The type of the expression result.

Returns

Type	Description
DataGridSummaryGroupItemBuilder<TRow>	A reference to this instance after the method is called.

Remarks

Use this extension method to add a group summary item to a specific column of a strongly-typed DataGrid.

The method performs the following actions:

• Creates a new summary item

• Binds the summary item to two model properties:

  • the property that supplies data for the item
  • the property that corresponds to the column where the item should be placed
• Returns a DataGridSummaryGroupItemBuilder<T> instance so you can use its methods to customize the summary item

Razor C#

@(Html.DevExtreme().DataGrid<OrderViewModel>()
    .Summary(summary => summary
        .GroupItems(groupItems => {
            groupItems.AddFor(m => m.OrderDate, m => m.OrderId); // call methods in a chain to customize the summary item
        })
    )
)

Refer to Nested Options and Collections for more information.