Flex Datagrid item renderer DateField, Combobox Issue help !

1) Using datefield as item renderer in flex

I am dynamically creating datagrid and its columns. like

dataGridColumn=new DataGridColumn();
dataGridColumn.dataField="invoiceDTO.invoiceDate";// I read this value from XML
dataGridColumn.editorDataField="selectedDate";
dataGridColumn.itemRenderer=new ClassFactory(DateFieldRenderer);
dataGridColumn.rendererIsEditor=true;

But when UI is generated i get the error invoiceDTO.invoiceDate not found on the TestDTO

//Test DTO

public class TestDTO
{
 public var invoiceDTO:InvoiceDTO;
}              

My objective is my dataField should be binded with datafield inside the datagrid.How can i do it in actionscript

2) I need to present combo开发者_如何学编程box as item renderer. (same like case 1). But how can i assign dataprovider in the combobox which is present inside the datagrid.

FYI this needs to be done in actionscript

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About the first part of question. You can't use complex expressions in dataField parameter. To display a custom label it is better to use labelFunction.

What about the second part you should read official documentation. There is a sample of creating custom ActionScript item renderers. To be short you can operate data property within item renderer to have access to a current element of data provider.