How to maintain the value of label after postback in Asp.net?

In asp.net page I need to know how to maintain the value of a particular label assign by the html button click. After postback done. Detailed code: <table> <tr> <td><asp:Label ID="lbl1" runat="server" ClientIDMode="Static">Before Changing</asp:Label></td> <td><asp:Label id="lbl2" runat="server" ClientIDMode="Static"></asp:Label></td> <td><asp:TextBox ID="txtbox" runat="server"></asp:TextBox></td> </tr> <tr> <td><asp:Button ID="btnasp" runat="server" Text="ASP Button" Height="50px" Width="150px" OnClick="btnasp_Click"/></td> <td><input type="button" id="btnhtml" value="HTML … Read more