GridUnboundColumnDataEventArgs Class

Contains data for the UnboundColumnData event.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v21.1.dll

NuGet Package: DevExpress.Blazor

Declaration

public class GridUnboundColumnDataEventArgs

Remarks

Handle the UnboundColumnData event to specify data for the unbound column. Use GridUnboundColumnDataEventArgs (Value, FieldName, and so on) to specify column values and access other grid data.

The following example illustrates how to create two unbound columns: “Discontinued” and “Total Price”. The UnboundType property specifies the data types of the unbound columns (Boolean and Decimal). To display the “Discontinued” column values as check boxes, use the DxCheckBox<T> component within the column’s cell template (CellDisplayTemplate). The UnboundColumnData event allows you to evaluate data for the unbound columns.

<DxGrid Data="GridDataSource"
    UnboundColumnData="Grid_CustomUnboundColumnData">
    <Columns>
        <DxGridDataColumn FieldName="ProductId" DisplayFormat="d" />
        <DxGridDataColumn FieldName="UnitPrice" />
        <DxGridDataColumn FieldName="Quantity" />
        <DxGridDataColumn FieldName="Discount" DisplayFormat="p0" />
        <DxGridDataColumn FieldName="Discontinued" UnboundType="GridUnboundColumnType.Boolean">
            <CellDisplayTemplate>
                <DxCheckBox Checked="@((bool)context.Value)" />
            </CellDisplayTemplate>
        </DxGridDataColumn>
        <DxGridDataColumn FieldName="TotalPrice"
                      DisplayFormat="c"
                      UnboundType="GridUnboundColumnType.Decimal" />
    </Columns>
</DxGrid>
@* ... *@
@code {

    object GridDataSource { get; set; }

    protected override void OnInitialized()
    {
        GridDataSource = Northwind.OrderDetails
            .Include(i => i.Product)
            .ToList();
    }

    void Grid_CustomUnboundColumnData(GridUnboundColumnDataEventArgs e)
    {
        if(e.FieldName == "TotalPrice")
        {
            var unitPrice = Convert.ToDecimal(e.GetRowValue("UnitPrice"));
            var quantity = Convert.ToDecimal(e.GetRowValue("Quantity"));
            var discount = Convert.ToDecimal(e.GetRowValue("Discount"));

            e.Value = quantity * unitPrice * (1 - discount);
        }

        if(e.FieldName == "Discontinued")
        {
            e.Value = Convert.ToDecimal(e.GetRowValue("Discount")) == 0;
        }
    }
}

Inheritance

Object

GridUnboundColumnDataEventArgs