devexpress-examples / how-to-use-two-way-data-bound-aspxgridlookup-in-edit-form-of-aspxgridview-to-edit-data-e2979

Create a column edit item template, add a grid lookup control to the template, and use the control's DataSourceID property and Bind method to bind the control to data sources.

Grid View for ASP.NET Web Forms - How to use a two-way data-bound grid lookup in the grid's edit form

This example demonstrates how to create a column edit item template, add a grid lookup control to the template, and use the control's DataSourceID property and Bind method to bind the control to data sources.

Overview

Create a combo box column and specify its EditItemTemplate property. Add a grid lookup control to the template and use its DataSourceID property to specify the control's data source. Then use the Bind method to bind the control's Value property to the corresponding field in the main grid's data source.

<dx:GridViewDataComboBoxColumn FieldName="CategoryID" VisibleIndex="1">
    <PropertiesComboBox DataSourceID="dsCategories" TextField="CategoryName" ValueField="CategoryID"
        ValueType="System.Int32">
    </PropertiesComboBox>
    <EditItemTemplate>
        <dx:ASPxGridLookup ID="glCategory" runat="server" AutoGenerateColumns="False" 
            DataSourceID="dsCategories" KeyFieldName="CategoryID" OnLoad="glCategory_Load" 
            TextFormatString="{1}" Value='<%# Bind("CategoryID") %>' Width="260px">
            <GridViewProperties>
                <SettingsBehavior AllowFocusedRow="True" AllowSelectByRowClick="True" 
                    AllowSelectSingleRowOnly="True" />
            </GridViewProperties>
            <Columns>
                <dx:GridViewDataTextColumn FieldName="CategoryID" ReadOnly="True" 
                    Visible="False" VisibleIndex="0">
                    <EditFormSettings Visible="False" />
                </dx:GridViewDataTextColumn>
                <dx:GridViewDataTextColumn FieldName="CategoryName" VisibleIndex="1" />
                <dx:GridViewDataTextColumn FieldName="Description" VisibleIndex="2" />
            </Columns>
        </dx:ASPxGridLookup>
    </EditItemTemplate>
</dx:GridViewDataComboBoxColumn>

Files to Review

• Default.aspx (VB: Default.aspx)

Documentation

• Data-Binding Expressions Overview

More Examples

• Two-Way Binding