Custom Errors

seppey · Jul 4, 2003

Does anyone know if there is anyway to get custom error pages to work?

I have tried creating a .htaccess file which points to my custom 404 error page (admin/error.aspx) but if I point to a file that is not there, then the normal windows 404 error appears.

Can custom errors be aspx files?

[?]

Humanitad.org

pjoyce · Jul 4, 2003

yes, custom error pages are easy to set up in .NET and you can use .ASPX pages. All you need to do is edit your web.config file a little bit. The setup is very flexible, you can have a page to catch specific errors, such as 404 errors, as well as a default error page.

In your web.config file look for the <customErrors/> tag. By default I believe it is set to "RemoteOnly," meaning that detailed .NET error messages will be shown in the page only if you are actually on the server machine (not too useful in a hosted scenario.) If your 404 page is "My404.aspx," in your web root then your would change this to read:

<customErrors</fontid="maroon">mode</fontid="red">="On"</fontid="blue">>
<error</fontid="maroon">statusCode</fontid="red">="404"</fontid="blue">redirect</fontid="red">="/My404.aspx"</fontid="blue">/>
</customErrors>
</CODE>

If you want a "generic" error page, you add the defaultRedirect attribute to the <customErrors> element, thus:

<customErrors</fontid="maroon">mode</fontid="red">="On"</fontid="blue">defaultRedirect</fontid="red">="/MyOtherErrors.aspx"</fontid="blue">>
<error</fontid="maroon">statusCode</fontid="red">="404"</fontid="blue">redirect</fontid="red">="/My404.aspx"</fontid="blue">/>
</customErrors>
</CODE>

CAUTIONS: The web.config is an XML file, so it is case sensitive. CustomError is not equal to customError. Also, when you create a new web app, the customErrors element will be closed... that is it will contain a "/". Make sure to get rid of that and close the tag with the closing </customErrors>.

Last word on Errors -- the Global.asax contains a stub for the Application_Error event. This event is raised whenever an error occurs in your application. You can use this to do your own error logging to a datbase or whatever. I have mine set up to e-mail me, if you'd like the code for that, let me know.
Click to expand...

Click to expand...

bdwest · Jul 11, 2003

I only seem to be able to get the custom error sot work with aspx page request. For example if you click on the following url should get a custom error.

www.sanjuanflows.info/oops.aspx

However, I dont get a custom error with

www.sanjuanflows.info/oops

I don't understand why. Here is the section of my webconfig.

<customErrors defaultRedirect="Error.aspx" mode="RemoteOnly" >
<error statusCode="404" redirect="Error.aspx?errCode=404" />
<error statusCode="500" redirect="Error.aspx?errCode=500" />
</customErrors>

I have an error page that accepts parameters so I can generate different messages on the same page.

Any ideas?

Thanks

Brian

quote:Originally posted by pjoyce

yes, custom error pages are easy to set up in .NET and you can use .ASPX pages. All you need to do is edit your web.config file a little bit. The setup is very flexible, you can have a page to catch specific errors, such as 404 errors, as well as a default error page.

In your web.config file look for the <customErrors/> tag. By default I believe it is set to "RemoteOnly," meaning that detailed .NET error messages will be shown in the page only if you are actually on the server machine (not too useful in a hosted scenario.) If your 404 page is "My404.aspx," in your web root then your would change this to read:

<customErrors</fontid="maroon">mode</fontid="red">="On"</fontid="blue">>
<error</fontid="maroon">statusCode</fontid="red">="404"</fontid="blue">redirect</fontid="red">="/My404.aspx"</fontid="blue">/>
</customErrors>
</CODE>

If you want a "generic" error page, you add the defaultRedirect attribute to the <customErrors> element, thus:

<customErrors</fontid="maroon">mode</fontid="red">="On"</fontid="blue">defaultRedirect</fontid="red">="/MyOtherErrors.aspx"</fontid="blue">>
<error</fontid="maroon">statusCode</fontid="red">="404"</fontid="blue">redirect</fontid="red">="/My404.aspx"</fontid="blue">/>
</customErrors>
</CODE>

CAUTIONS: The web.config is an XML file, so it is case sensitive. CustomError is not equal to customError. Also, when you create a new web app, the customErrors element will be closed... that is it will contain a "/". Make sure to get rid of that and close the tag with the closing </customErrors>.

Last word on Errors -- the Global.asax contains a stub for the Application_Error event. This event is raised whenever an error occurs in your application. You can use this to do your own error logging to a datbase or whatever. I have mine set up to e-mail me, if you'd like the code for that, let me know.

</blockquote id="quote">
Click to expand...

Click to expand...

Takeshi Eto · Jul 11, 2003

Yes, this method will only work for .aspx pages. We are working on a tool where you can specify the customer error pages for other extensions.

DiscountASP.NET

bdwest · Jul 11, 2003

Thanks for clearning this up - I thought I was doing something wrong.

Brian
quote:Originally posted by dasp

Yes, this method will only work for .aspx pages. We are working on a tool where you can specify the customer error pages for other extensions.

DiscountASP.NET
</blockquote id="quote">

arby · Jul 12, 2003

pjoyce, I would appreciate if you could post the code you mentioned you have in your global file to email you any errors.

Thanks!

pjoyce · Jul 15, 2003

Sure, I'll be glad too, but I'm a bit busy day and night until friday. Can you wait until this weekend?

quote:Originally posted by arby

pjoyce, I would appreciate if you could post the code you mentioned you have in your global file to email you any errors.

Thanks!
</blockquote id="quote">

arby · Jul 16, 2003

Sure, no problem. Thanks!

quote:Originally posted by pjoyce

Sure, I'll be glad too, but I'm a bit busy day and night until friday. Can you wait until this weekend?

quote:Originally posted by arby

pjoyce, I would appreciate if you could post the code you mentioned you have in your global file to email you any errors.

Thanks!
</blockquote id="quote">
</blockquote id="quote">

pjoyce · Jul 16, 2003

This is in C# but I'm guessing people can translate to VB.NET. If you make any improvements to the code, I'd appreciate it if you could let me know. There are a couple of things that are specific to my application, namely the e-mail address and configuration parameters. I have a configuration parameter to turn the e-mail of errors on or off and another for the e-mail address to send to. Both these are in the web.config file. Your global.asax should already have a method for Application_Error which gets called for all .ASPX errors. You will have to add the ParseException method.

protectedvoidApplication_Error(Objectsender,EventArgse){
System.Exceptionerr=Server.GetLastError();
try{;
if(PScheduler.Config.ApplicationSettings.MailErrors){
System.Web.Mail.MailMessageMsg=newSystem.Web.Mail.MailMessage();

Msg.To=PScheduler.Config.ApplicationSettings.ErrorMailAddress;
Msg.From="[email protected]";
Msg.Body="ErrorinMyApplicationapplicationat\n"+System.DateTime.UtcNow.ToString()+"UTC";
Msg.Body+="Onserver"+Server.MachineName+"\n\n";
Msg.Body+=ParseException(err);
Msg.Subject=(err.GetBaseException()==null?"ErrorinMyApp":"ErrorinMyApp:"+err.GetBaseException().Message);
Msg.Subject+="AT"+System.DateTime.UtcNow.ToString()+"UTC";
System.Web.Mail.SmtpMail.Send(Msg);
}
}
catch(System.ExceptionErrorErr){
//Suppresserror--canthaveerrorsraisedhere.
}
}

privatestringParseException(System.Exceptionerr){
stringMessage=string.Empty;

try{
Message="Errorin"+err.Source+":"+err.Message+"\n";
Message+="StackTrace"+err.TargetSite.Name+"\n";
Message+=err.StackTrace+"\n";
if(err.InnerException!=null){
Message+="InnerException:\n";
Message+=ParseException(err.InnerException)+"\n";
}
}catch(System.Exceptione){
//Mustcatchexceptionsheretopreventendlessloop
Message="Errorparsingexception";
}
returnMessage;
}
</CODE>
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arby · Jul 20, 2003

Thanks, this worked great!

Takeshi Eto · Aug 4, 2003

We launched an IIS Manager tool in the control panel where you can control your 404 and 500 error pages.

DiscountASP.NET

Malin · Aug 15, 2004

Thanks for your code pjoyce

Is there a way to e-mail handled errors as well?
I tested your code and application_error in global.asax does not fire if there is an handled error - but still I want to know about these errors as well.

Malin

pjoyce · Aug 18, 2004

quote:Originally posted by Malin

Thanks for your code pjoyce

Is there a way to e-mail handled errors as well?
I tested your code and application_error in global.asax does not fire if there is an handled error - but still I want to know about these errors as well.

Malin
</blockquote id="quote">

The application doesn't know if you handle an error, so there is no "universal" way of doing it. You would have to put the code to e-mail you the error in the catch statement.

Malin · Aug 18, 2004

quote:Originally posted by pjoyce

quote:Originally posted by Malin

Thanks for your code pjoyce

Is there a way to e-mail handled errors as well?
I tested your code and application_error in global.asax does not fire if there is an handled error - but still I want to know about these errors as well.

Malin
</blockquote id="quote">

The application doesn't know if you handle an error, so there is no "universal" way of doing it. You would have to put the code to e-mail you the error in the catch statement.
</blockquote id="quote">

OK, then I will create a class for this where the constructor does the mailing and then make an instance of this class in every catch. This leaves med with just one line of code in every catch.. which I find acceptable.

Thanks for your answer

Malin

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Custom Errors

seppey

pjoyce

bdwest

Takeshi Eto DiscountASP.NET Staff

bdwest

arby

pjoyce

arby

pjoyce

arby

Takeshi Eto DiscountASP.NET Staff

Malin

pjoyce

Malin

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Custom Errors

Takeshi Eto DiscountASP.NET Staff

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