<dx:GridViewDataComboBoxColumn FieldName="ProductID" VisibleIndex="1" Caption="产品编号" ReadOnly="true">
            <EditItemTemplate>
                <dx:ASPxGridLookup ID="gluProductId" runat="server" ClientInstanceName="gluProductId"
                 KeyFieldName="ProductID" Width="100%"
                 DataSourceID="ldsProduct" TextFormatString="产品编号:{0}； 产品名称:{1}" Value='<%#Bind("ProductID") %>'>
                 <Columns>
                    <dx:GridViewDataColumn FieldName="ProductID" Caption="产品编号" Width="100px"/>
                    <dx:GridViewDataColumn FieldName="ProductName"  Caption="产品名称" />
                 </Columns>
                 <GridViewProperties>
                        <SettingsBehavior AllowFocusedRow="True" AllowSelectSingleRowOnly="True"></SettingsBehavior>
                    <SettingsPager PageSize="10">
                    </SettingsPager>
                    <Settings ShowFilterRow="True" />
                    </GridViewProperties>
                </dx:ASPxGridLookup>
            </EditItemTemplate>
        </dx:GridViewDataComboBoxColumn>

------解决方案--------------------

感觉好像你代码写的有点问题哦