How to assign Datakeyname to a Grid - Nested Objects

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grid

data

I am facing a issue while assigning the DataKeyNames to a grid.

<
Sample - My Class objects:

Class Human
{
string Name;
}

Class Employee
{
Human human;
string EmpId;
}
>

<asp:GridView runat="server" ID="grdInformation"
DataKeyNames="EmpId,human.Name" >

This assignment for Data Keyname throws error, is there any possiblity to assign from code behind as,

grdInformation.DataKeyNames = new string []{ ......what has to be done here... } 

Please edit if my question can be made better understandable.

Thanks in advance.

Let me know in case more infor required [In comments]