Application errors and broken requests

[Marius Tennes Krogh]

Hi!
I've written some code in my globala.asax application_err or event to send me
some email whenever an error occur. I send the errormessage, stacktrace,
etc. and I also list all the form elements and their values
(Request.Form.A llKeys - looping through all keys).
Now, sometimes not all the Form elements that is in the page get listed.
What can cause this? Can it be that the request has been broken (not
complete) because of some error on the network? If this is so, how can I
detect an incomplete request?

Here is one example. This page have a lot of textboxes, but only three form
elements get listed
----------------------------------------------------
Type : System.FormatEx ception
Message : String was not recognized as a valid DateTime.
Source : mscorlib
StackTrace: at System.DateTime Parse.Parse(Str ing s, DateTimeFormatI nfo dtfi,
DateTimeStyles styles)
at System.DateTime .Parse(String s, IFormatProvider provider,
DateTimeStyles styles)
at System.DateTime .Parse(String s, IFormatProvider provider)
at System.DateTime .Parse(String s)
at System.Convert. ToDateTime(Stri ng value)
at timelister.main .btn_forrige_da g_Click(Object sender, EventArgs e) in
c:\inetpub\wwwr oot\timeregistr ering_v2_1\main .aspx.cs:line 316
at System.Web.UI.W ebControls.Butt on.OnClick(Even tArgs e)
at
System.Web.UI.W ebControls.Butt on.System.Web.U I.IPostBackEven tHandler.RaiseP ostBackEvent(St ring
eventArgument)
at System.Web.UI.P age.RaisePostBa ckEvent(IPostBa ckEventHandler
sourceControl, String eventArgument)
at System.Web.UI.P age.RaisePostBa ckEvent(NameVal ueCollection postData)
at System.Web.UI.P age.ProcessRequ estMain()
*************** ******
* Form Values *
*************** ******

txt_error :
txt_periodeuke3 : 200529
btn_forrige_dag : <<
----------------------------------------------------
The error itself got thrown because it tried to convert the value in a
textbox called txt_day. But as you can see the texbox txt_day is not in the
Request.Form. If this happend because of an "incomplete " request, how can I
detect it? The user doesn't experience any error at all.

Any help would be appreciated.

Marius