testing for exceptions

[cj]

HttpWebRequest. Create(String) doesn't return any error codes but it does
show exceptions
http://msdn.microsoft.com/library/de...eatetopic1.asp
When I run
REQUEST = Net.HttpWebRequ est.Create(URI)
How do I test to see if it has worked? And if it didn't which of these
exceptions occured. I'd hope I don't have to do and if for each one
just in case.

Thanks

[Cerebrus99]

Re: testing for exceptions

Hi,

Why not try the generic Exception class.
Use it's properties to give you more information about the error. As in:

Try
' your code here
Catch ex as Exception
Msgbox(ex.Messa ge)
Finally
MyRequest.Close ()
End Try

Hope this helps,

Regards,
Cerebrus.

"cj" <cj@nospam.nosp am> wrote in message
news:OFdf$wZMGH A.1424@TK2MSFTN GP12.phx.gbl...[color=blue]
> HttpWebRequest. Create(String) doesn't return any error codes but it does
> show exceptions
>[/color]
http://msdn.microsoft.com/library/de...us/cpref/html/
frlrfsystemnetw ebrequestclassc reatetopic1.asp[color=blue]
> When I run
> REQUEST = Net.HttpWebRequ est.Create(URI)
> How do I test to see if it has worked? And if it didn't which of these
> exceptions occured. I'd hope I don't have to do and if for each one
> just in case.
>
> Thanks[/color]

[Ken Tucker [MVP]]

Re: testing for exceptions

Hi,

If request is nothing then it failed.

Ken
--------------
"cj" <cj@nospam.nosp am> wrote in message
news:OFdf$wZMGH A.1424@TK2MSFTN GP12.phx.gbl...[color=blue]
> HttpWebRequest. Create(String) doesn't return any error codes but it does
> show exceptions
> http://msdn.microsoft.com/library/de...eatetopic1.asp
> When I run
> REQUEST = Net.HttpWebRequ est.Create(URI)
> How do I test to see if it has worked? And if it didn't which of these
> exceptions occured. I'd hope I don't have to do and if for each one just
> in case.
>
> Thanks[/color]

[TerryFei]

RE: testing for exceptions

Hi Cj,
Welcome to MSDN Newsgroup!
[color=blue][color=green]
>>How do I test to see if it has worked?[/color][/color]
I agree with Cerebrus's point. We can use try/catch statement to catch
exception and get more information why it failed.
Have a nice day!

Best Regards,

Terry Fei [MSFT]
Microsoft Community Support
Get Secure! www.microsoft.com/security


--------------------[color=blue]
>Date: Tue, 14 Feb 2006 14:24:17 -0500
>From: cj <cj@nospam.nosp am>
>User-Agent: Thunderbird 1.5 (Windows/20051201)
>MIME-Version: 1.0
>Subject: testing for exceptions
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>Content-Transfer-Encoding: 7bit
>Message-ID: <OFdf$wZMGHA.14 24@TK2MSFTNGP12 .phx.gbl>
>Newsgroups: microsoft.publi c.dotnet.langua ges.vb
>NNTP-Posting-Host: 208.254.170.98
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>Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
>Xref: TK2MSFTNGXA01.p hx.gbl microsoft.publi c.dotnet.langua ges.vb:317700
>X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
>
>HttpWebRequest .Create(String) doesn't return any error codes but it does
>show exceptions
>http://msdn.microsoft.com/library/de...-us/cpref/html[/color]
/frlrfsystemnetw ebrequestclassc reatetopic1.asp[color=blue]
>When I run
>REQUEST = Net.HttpWebRequ est.Create(URI)
>How do I test to see if it has worked? And if it didn't which of these
>exceptions occured. I'd hope I don't have to do and if for each one
>just in case.
>
>Thanks
>[/color]

[Jay B. Harlow [MVP - Outlook]]

Re: testing for exceptions

cj,
In addition to the other comments, I normally use something like:

Dim uri As New Uri("http://www.tsbradley.n et")
Dim request As HttpWebRequest = DirectCast(WebR equest.Create(u ri),
HttpWebRequest)
Dim response As HttpWebResponse
Try
response = DirectCast(requ est.GetResponse (), HttpWebResponse )
Catch ex As WebException When TypeOf ex.Response Is HttpWebResponse
response = DirectCast(ex.R esponse, HttpWebResponse )
End Try

Then I am able to use response.Status Code to see what the HTTP status
returned was:

Debug.WriteLine (response.Statu sCode, "statusCode ")

The:

Catch ex As WebException When TypeOf ex.Response Is HttpWebResponse

Will only catch WebExceptions where the WebException.Re sponse is of type
HttpWebResponse , other exceptions will continue up to a higher exception
handler...

--
Hope this helps
Jay [MVP - Outlook]
..NET Application Architect, Enthusiast, & Evangelist
T.S. Bradley - http://www.tsbradley.net


"cj" <cj@nospam.nosp am> wrote in message
news:OFdf$wZMGH A.1424@TK2MSFTN GP12.phx.gbl...
| HttpWebRequest. Create(String) doesn't return any error codes but it does
| show exceptions
|
http://msdn.microsoft.com/library/de...eatetopic1.asp
| When I run
| REQUEST = Net.HttpWebRequ est.Create(URI)
| How do I test to see if it has worked? And if it didn't which of these
| exceptions occured. I'd hope I don't have to do and if for each one
| just in case.
|
| Thanks