Gridview Datakey value

[Guest]

Hiya,

Im sure this is one of those easy if you know how type
basically i have a dataview and i want to bind it to a gridview


grdResults.DataSource=objDataSet.Tables["results"].DefaultView;
grdResults.DataBind();

However i want to set the key like in the old datagrid so i can access it on
arow by row basis
Ive tried grdResults.DataKeyNames = "idKey" but nothing happens

TIA

Stu