How to generate checkbox on grouping column in advanced datagrid : flex 3

Question

This is my code .but it generate for all rows. I want checkbox for only where studyid displayed.
<mx:AdvancedDataGrid id="dgList" x="10" y="342" width="1001" height="175" sortExpertMode="true" borderColor="#992958" styleName="invoiceDataGrid">
                <mx:dataProvider>
                    <mx:GroupingCollection id="groupda" source="{CptArr}">
                        <mx:Grouping>
                            <mx:GroupingField name="patientname"></mx:GroupingField>
                            <mx:GroupingField name="studyId"></mx:GroupingField>
                        </mx:Grouping>
                    </mx:GroupingCollection>
                </mx:dataProvider>
                <mx:groupedColumns>
                    <mx:AdvancedDataGridColumn headerText="Patient Details" width="200"/>
                    <mx:AdvancedDataGridColumn dataField="cpt_code_val" headerText="CPT Code" width="100"/>
                    <mx:AdvancedDataGridColumn dataField="cpt_desc" headerText="CPT Description"/>
                    <mx:AdvancedDataGridColumn dataField="modifier" headerText="Modifier" width="100"/>
                    <mx:AdvancedDataGridColumn headerText="Fee Schedule" dataField="fee_schdule" width="100"/>
                    <mx:AdvancedDataGridColumn headerText="select" id="dgselect">
                    <mx:itemRenderer>
                        <mx:Component>
                            <mx:CheckBox visible="{data.cptdesc}"
                        </mx:Component>
                    </mx:itemRenderer>
                    </mx:AdvancedDataGridColumn>
                </mx:groupedColumns>
            </mx:AdvancedDataGrid>
output:
but i want like this:
Thanks in advance for your help.

Answer 1

Sunil,
Which column is the sal column? I can’t see any numeric columns in your query. If you use htmldb_item calls in your query column, then this makes them strings and you can’t build sums on string columns. If you want to build sums in an updateable report / tabular form, then don’t use the htmldb_item API. Instead use the built-in display types on the report column attributes page. Using the built-in display types is the better options in most cases anyway and they do allow you to calculate sums even if the column is a text field or display and save type field.
Regards,
Marc