Get Value from Gridview in Gridview RowCommand Event

gistfile1.cs

<asp:TemplateField HeaderText="Account No">
   <ItemTemplate>
     <asp:Label ID="lblAccountNo" runat="server" Text="<%# Bind('ReceivedItemInfo_AccountNo') %>"></asp:Label>
     <asp:HiddenField ID="hdnIsFlag" Value="<%# Bind('ReceivedItemInfo_IsFlag') %>" runat="server" />
     <asp:HiddenField ID="hdnPreviousState" Value="<%# Bind('ReceivedItemInfo_PreviousState') %>" runat="server" />
   </ItemTemplate>
</asp:TemplateField>


protected void gridViewReceivedInfo_RowCommand(object sender, GridViewCommandEventArgs e)
{
    GridViewRow row = (GridViewRow)(((Button)e.CommandSource).NamingContainer);
    HiddenField hdnPreviousState = (HiddenField)row.Cells[1].FindControl("hdnPreviousState");
    string previousState = hdnPreviousState.Value;
}

Thanks for solution,
Even we can optimize it as
string previousState = ((HiddenField)((GridViewRow)(((Button)e.CommandSource).NamingContainer)).FindControl("hdnPreviousState")).Value;

muchas gracias!
Thank you too much