GridViewDataColumn.UnboundExpression Property
Gets or sets an expression used to evaluate values for the current unbound column.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v24.2.dll
Declaration
Property Value
Type | Default | Description |
---|---|---|
String | String.Empty | An expression used to evaluate values for the current column. |
Remarks
Set the GridViewDataColumn.UnboundType property to a specific data type to create an unbound column. Populate unbound columns in the designer or use the ASPxGridView.CustomUnboundColumnData event or the UnboundExpression property. The Expressions section describes the expression syntax.
Expressions do not allow you to save data entered by end users. For this purpose, use the ASPxGridView.CustomUnboundColumnData event to provide data for unbound fields.
Concept
Example
<dx:ASPxGridView ID="Grid" runat="server" DataSourceID="ProductsDataSource" KeyFieldName="OrderID" >
<Columns>
<dx:GridViewDataSpinEditColumn FieldName="UnitPrice" />
<dx:GridViewDataSpinEditColumn FieldName="Quantity" />
<dx:GridViewDataSpinEditColumn FieldName="Discount" />
<dx:GridViewDataTextColumn FieldName="Total" UnboundType="Decimal"
UnboundExpression="UnitPrice*Quantity*(1-Discount)" />
</Columns>
</dx:ASPxGridView>
See Also