How To find Out Row index in GridView?

<asp:gridview id="grd" onrowcommand="grd_RowCommand">
<columns>
<asp:templatefield>
    <itemtemplate>
		<asp:TextBox id="txtName" runat="server" />
        <asp:linkbutton id="btn" runat="server" text="Click" commandname="Click" />
    </itemtemplate>
</asp:templatefield>
</columns>
</asp:gridview>

protected void grd_RowCommand(object sender, GridViewRowEventArgs e)
{
	if (e.Row.RowType == DataControlRowType.DataRow)
	{
		string name = e.Row.Cells[0].Text;
	}
}