GridColumnDataEventArgs.RowData Property

Gets an object that contains information on the currently processed row.

Namespace: DevExpress.XamarinForms.DataGrid

Assembly: DevExpress.XamarinForms.Grid.dll

Declaration

public IRowData RowData { get; }

Property Value

Type	Description
IRowData	An object that implements the IRowData interface.

Remarks

Use the IRowData object’s properties and methods to access required data values of the processed row when you handle the DataGridView.CustomUnboundColumnData event to supply data for an unbound column. The IRowData.RowHandle property returns the processed row handle. To obtain an object that represents a record in the grid’s underlying data source, use the IRowData.Item property. To get a value in the specified field, use the IRowData.GetFieldValue method.

If the DataGridView.CustomUnboundColumnData event is raised when an unbound column’s value is modified in the grid (GridColumnDataEventArgs.IsSetData is true), you can change any field’s value based on the modified value of the unbound column. To do this, use the IEditableRowData.SetFieldValue method of an object that the GridColumnDataEventArgs.EditableRowData property returns.

Example

Assume that the DataGridView instance is bound to a collection of orders. An order has the Product.Name, Product.UnitPrice and Quantity fields. This example shows how to add an unbound column (Total) to the grid to calculate each order amount according to the expression: UnitPrice*Quantity.

Implement logic to calculate column values in one of the following ways:

• Use the GridColumn.UnboundExpression property:

XAML

<dxg:DataGridView x:Name="grid" ItemsSource="{Binding Orders}">
    <dxg:DataGridView.Columns>
        <dxg:TextColumn FieldName="Product.Name" Caption="Product" Width="170" />
        <dxg:NumberColumn FieldName="Product.UnitPrice" Caption="Price" DisplayFormat="C0"/>
        <dxg:NumberColumn FieldName="Quantity"/>
        <dxg:NumberColumn FieldName="Total" UnboundType="Integer"
                          UnboundExpression="[Quantity] * [Product.UnitPrice]" 
                          IsReadOnly="True" DisplayFormat="C0"/>
    </dxg:DataGridView.Columns>
</dxg:DataGridView>

• Use the DataGridView.CustomUnboundColumnData event:

XAML

<dxg:DataGridView x:Name="grid" ItemsSource="{Binding Orders}" CustomUnboundColumnData="Grid_CustomUnboundColumnData">
    <dxg:DataGridView.Columns>
        <dxg:TextColumn FieldName="Product.Name" Caption="Product" Width="170" />
        <dxg:NumberColumn FieldName="Product.UnitPrice" Caption="Price" DisplayFormat="C0"/>
        <dxg:NumberColumn FieldName="Quantity"/>
        <dxg:NumberColumn FieldName="Total" UnboundType="Integer"
                          IsReadOnly="True" DisplayFormat="C0"/>
    </dxg:DataGridView.Columns>
</dxg:DataGridView>

C#

// Returns the total for a specific row.
decimal getTotalValue(DataGridView grid, int rowHandle) {
    decimal unitPrice = Convert.ToDecimal(grid.GetCellValue(rowHandle, "Product.UnitPrice"));
    decimal quantity = Convert.ToDecimal(grid.GetCellValue(rowHandle, "Quantity"));
    return unitPrice * quantity;
}

// Provides data for the Total column.
void Grid_CustomUnboundColumnData(object sender, GridColumnDataEventArgs e) {
    if (e.Column.FieldName == "Total" && e.IsGetData)
        e.Value = getTotalValue (e.Source, e.RowData.RowHandle);
}