ASP.NET

public class PageCleanerStream
{
  // implement filter stuff here
}

public class PageCleanerHttpModule : IHttpModule
{
  PageCleanerHttpModule() { }
  public void Dispose() { }

  public void Init(HttpApplication context)
  {
    context.PostRequestHandlerExecute += new EventHandler(
      delegate(object sender, EventArgs args)
      {
        if (sender is HttpApplication)
        {
          using (HttpApplication app = sender as HttpApplication)
          {
            if (app.Context.CurrentHandler is Page)
              app.Response.Filter = new PageCleanerStream(app.Response.Filter);	
          }
        }
      }
    );
  }
}

Page page = app.Context.CurrentHandler as Page;
if (page.Request.Url.GetLeftPart(UriPartial.Path).IndexOf("somepage.aspx") < 0)
  app.Response.Filter = new PageCleanerStream(app.Response.Filter);	

if ((app.Response.Headers["URI"]).IndexOf("somepage.aspx") < 0)
  app.Response.Filter = new PageCleanerStream(app.Response.Filter);

<asp:TemplateField HeaderText="test templet">
    <ItemTemplate>
        <asp:CheckBox ID="CheckBox2" runat="server" AutoPostBack="True"
            Checked='<%# Bind("Archived") %>' oncheckedchanged="CheckBox2_CheckedChanged"/>
            </ItemTemplate>
</asp:TemplateField>

ERROR 16 Jul 2009 09:01:13,970 (Webpage code-behind class name) - Failed conversion of value
System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at (name of calling function in ASP.NET code-behind)

try
{
    dataObject.Weight = Convert.ToInt32(txbWeight.Text);
}
catch (Exception e)
{
    log.Error("Failed conversion of value", e);
}

<asp:CompareValidator runat="server" ControlToValidate="txbWeight" Type="Integer" 
Operator="GreaterThanEqual" ValueToCompare="0" Text="Positive number only for weight."
Display="Dynamic" />