C# - Datagrid Getting Selected Value (delete Xml Node)?

Lets assume there are 2 columns in my datagrid:

<asp:View ID="viewRemove" runat="server">
<asp:DataGrid ID="dgRemove" runat="server" AutoGenerateColumns="False" OnDeleteCommand="dg_DeleteCommand">
<Columns>
<asp:BoundColumn DataField="name" HeaderText="names" />
<asp:ButtonColumn ButtonType="PushButton" Text="Delete" CommandName="Delete" ></asp:ButtonColumn>
</Columns>
</asp:DataGrid>
</asp:View>

The first column displays names from a xml file and the button column just hold delete buttons so i can delete the corresponding item to the left of it (1st column).

How exactly can i retrieve/pass this selected value to a function? In other words when i press the button to the right of the name, it passes the value so i can work with that to remove the corresponding xml node. (using XPath)

XmlDocument XMLDoc = new XmlDocument();
XMLDoc.Load(file);
XPathNavigator nav = XMLDoc.CreateNavigator();
var node = nav.SelectSingleNode("/root/name['" + ??? + "']");
node.DeleteSelf();
XMLDoc.Save(file);