C# - Catching An Exception And Clearing It Before ELMAH Gets It?
Feb 18, 2011
i have a problem where i have an exception being thrown that i am capturing in global asax. As part of this exception handling i redirect the user to a specific page because of this exception.
i also have ELMAH error handling with the email module plugged in. I do not want to receive emails for this exception. I also don't want to add this type of exception to ELMAHs ignore list, in case i want to do granular work around the exception (ie, only if it matches certain properties, happens on certain pages)
i want to:
write an Application_OnError that redirects a user to a page (i know how to do this part, more for procedure i've left it here) In the Application_OnError stop ELMAH fromrecieving this error after i've caught it
i am currently calling Server.ClearError() inside my App_OnError method, but am still receiving these emails....
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Mar 14, 2011
I am trying to catch an exception but occasionally get an inner exception. I want to output both into a label. I often get Object reference not set to instance of an object if there is no inner exception.
Catch ex As Exception
exError = ex.Message.ToString
If Not ex.InnerException.Message Is Nothing Then
exError &= "<br/>" & ex.InnerException.Message.ToString
End If
Return View()
End Try
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May 5, 2010
Take the following code...
[Code]....
The aim here is to throw an 'AfterInitException' if there's an exception after Init has finished. My concern is that some low level error might result in an exception being thrown when, say, setting up the call to DoStuff and before the try/catch block within DoStuff has been set up. So an 'AfterInitException' would not be thrown even though the exception was thrown after Init!This might help...
[Code]....
...but then this is more messy and perhaps there could still be a low level exception which arises in clearing up the call to Init or setting up the try/catch block that follows it!
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Oct 1, 2010
I have a classical asp.net web service (asmx) and a web method in it. I need to throw a custom exception for some case in my web method, and I need to catch that specific custom exception where I call the web service method.
[Code]....
However, I cannot do that because when I add the web service reference on the client, I have service class, input and output classes, but I do not have custom exception class.
Also another problem is that, I have also problems with serializing Exception class (because of Exception.Data property implements IDictionary interface)
Is there a way to do this in my way, or am I in a completely wrong way, or is there something I miss about fundamentals of web services?
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Aug 2, 2010
OK, apparently related questions dont seem to address this directly. An exception reaches Elmah, maybe a repository cant reach a database, but then neither can Elmah reach that database. Even if they target different servers, maybe its a network problem.
Is there a way to configure fallback logs for Elmah for cases like this, e.g. a text file, message queue, email, sms, etc? If so, where do I start looking to do this, excpt for now the Elmah source code.
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May 31, 2010
I have ELMAH set up for a webapp, logging exceptions to a SQL server. I wish to have ELMAH send me an email too, but only when a specific exception is thrown (ie. MySpecialException). ELMAH must still log all exceptions to SQL server. I know you can do it programmatically in global.asax, but I'd prefer to use web.config. So, how do I restrict ELMAH error mails to filter out everything but a specific exception type, using web.config? UPDATE The filter ended up looking like this:
<test>
<and>
<not>
<is-type binding="Exception" type="MyApp.MySpecialException" />
</not>
<regex binding="FilterSourceType.Name" pattern="mail" caseSensitive="false"/>
</and>
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Feb 22, 2011
I have a simple button ADD
And ADD_Click code is:
protected void Add_Click(object sender, EventArgs e)
{
string strConnectionString = ConfigurationManager.ConnectionStrings["SqlServerCstr"].ConnectionString;
SqlConnection myConnection = new SqlConnection(strConnectionString);
myConnection.Open();
string hesap = Label1.Text;
string musteriadi = DropDownList1.SelectedItem.Value;
string avukat = DropDownList2.SelectedItem.Value;
SqlCommand cmd = new SqlCommand("INSERT INTO AVUKAT VALUES (@MUSTERI, @AVUKAT, @HESAP)", myConnection);
cmd.Parameters.AddWithValue("@HESAP", hesap);
cmd.Parameters.AddWithValue("@MUSTERI", musteriadi);
cmd.Parameters.AddWithValue("@AVUKAT", avukat);
cmd.Connection = myConnection;
SqlDataReader dr = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
Response.Redirect(Request.Url.ToString());
myConnection.Close();
}
What i want is, if anybody adding a data with same HESAP (primary key) i want a alert() function with this words. "Already there is a same data" or any words. Doesn't matter.
How can i do that?
NOTE: I want just the same HESAP value getting and catching an error.
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Aug 5, 2010
I have the following code
[code]....
and while that presents a friendlier error message to a user, I've forgotten how to show me the "real" error.
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May 13, 2010
The situation is I have two xslt files: one is called from my ASP.NET code, and there, the second xslt file is imported.What I'd like to accomplish is to pass a parameter to the first one so the second xslt(the one that is imported at the first xslt) can read it.
My c# code looks like this:
var oArgs = new XsltArgumentList();
oArgs.AddParam("fbLikeFeatureName", "", "Facebook_Like_Button");
ltlContentBody.Text = xmlUtil.TransformXML(oXmlDoc, Server.MapPath(eSpaceId + "/styles/ExploringXSLT/ExploreContentObjects.xslt"), true);
And I'm catching the param at the first xslt this way: <xsl:param name="fbLikeFeatureName" />
And then, passing it to the second xslt like this(previously, I import that file):
<xsl:call-template name="Articles">
<xsl:with-param name="fbLikeFeatureName"></xsl:with-param>
</xsl:call-template>
Finally, I'm catching the param on the second xslt file as following: <xsl:value-of select="$fbLikeButtonName"/>
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Mar 10, 2010
Using VS2008 SP1, .NET 3.5 SP1, C# Web Application Project
As we know, Web Application Projects (unlike Web Site Projects) compile the entire site for deployment. We have discovered a situation where the visual studio compiler doesnt catch and error. Then when we deploy the dll to the website (or even just run it in the built in web server) it catches the error and displays it as a "compilation" error during runtime. This is obviously disturbing. Let me explain the error:
Take a single web page in a new C# web app project, such as the default.aspx. Add a checkbox. Create an event handler for the checked changed event. Note that it modifies the .aspx file to add oncheckedchanged="yourmethodhere" in the checkbox item. Compile and everything is fine.
Now change the name of the method in the .aspx file, say for yourmethodhere to yourmethodhere_1 and compile again. Note you havent change the code behind, so you SHOULD get a compile error. But you dont. Now if you deploy or debug it, you will get a compilation error during runtime.
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Aug 28, 2010
Thisis the code I use to display an aspxloadingpanel with an ms update panel:
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(initializeRequest);
prm.add_pageLoaded(pageLoaded);[code]....
However when an error occurs on this page, the loading panel continuously remains on the screen...How can I catch errors so that instead it would actually show the error.
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Jan 23, 2011
I have a website that serves all its pages using a single 404 page. it displays hotel profiles form business and depending on different profile levels offers more or less functionality and information.
Through the DB a masterpage is selected and usercontrols are applyed to that.
I have a contact page like this : 404.aspx > masterpage.Master > contact.ascx
My form action looks like this default.aspx?404%3bhttp%3a%2f%2fwww1.testsite.co.uk%3a80%2fcontactus
and when I click the button this where I send up with an error "Validation of viewstate MAC failed" error.
I have read stuff on these for 4 hours but still have no idea where to start.
Do I need to
Catch the form action URL (postback URL) in the baseclass and change it back to [URL] - If I do this are the form firled values still intact
Do i need to do something to change the form.action url before the page is built, if so is this done in the masterpage preinit event as this is what the form tag is
What I know works is that the usercontrol is aware of the postback, but not the form values.
I want to be able to add a 404 based contact us form on any one of 1000s of profiles and be able to catch the values. Idearly I would like to do this in the codebehind of the usercontrol as this keeps the code seperate
I am sure this must be possible and normally I can work stuff out, but here I am totally stuck. I am trying to do this in VB.
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Dec 19, 2011
I have some code that is throwing unhandled DivideByZero exceptions in a WebMethod. These exceptions are not being caught by the global logging in Application_Error in global.asax. why exceptions thrown from a WebMethod are not handled by Application_Error?
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Feb 12, 2010
Imagine a web service with a method that returns a Customer object, that takes a customer ID as a parameter, i.e.
[WebMethod]
Customer GetCustomer(string customerId)
Now imagine that you're writing an ASP.NET app and you've generated a proxy for the service with the async operations. You create an instance of the service, wire service.GetCustomerCompleted to your handler, OnGetCustomerCompleted, and call service.GetCustomerAsync("12345"). In OnGetCustomerCompleted you apply logic to detect that no customer was found and throw a custom exception, or you want to throw the exception found in e.Error, e.g.:
void OnGetCustomerCompleted(object sender, GetCustomerCompletedEventArgs e)
{
if (e.Error != null)
throw new ApplicationException("GetCustomer failed", e.Error);
if (String.IsNullOrEmpty(e.Result.FirstName) && String.IsNullOrEmpty(e.Result.LastName))
throw new CustomerNotFoundException();
}
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Jan 24, 2011
I'm following this blog post about setting up ELMAH with MVC: [URL] I've only done part 1. Everything works correctly if I simply go to the Home controller, and then cause an error. I can view /elmah.axd as well, and my errors are logging in the database correctly.
However, I've added an area to my application named Admin. If I navigate to /Admin, I receive the following error:
System.MissingMethodException: No parameterless constructor defined for this object.
public override IController CreateController(RequestContext requestContext, string controllerName)
{
var controller = base.CreateController(requestContext, controllerName); //Error here
var c = controller as Controller;
I'm assuming this has something to do with my Area.
EDIT for jfar:
For instance, I have an Employees controller in my Admin area:
public class EmployeesController : Controller
{
private IEmployeesRepository employeesRepository;
public EmployeesController(IEmployeesRepository employeesRepository)
{
this.employeesRepository = employeesRepository;
}
//...
}
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May 21, 2010
I am trying to setup elmah for asp.net 1.1 application.i have following entry in my web.config
<httpHandlers>
<add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
</httpHandlers>
[code]...
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Feb 24, 2010
I have ELMAH setup on my production server and it has done a fantastic job of letting me know about any niggles - as well as any creative SQL injection!I've decided to introduce URl Rewriting and went for http://www.urlrewriting.net/ in the end. It was nice and easy to setup and it's doing exactly what I want with the customer-facing site.The problem is ELMAH. Because I've set the urlrewritingnet node in my config like so:
<urlrewritingnet
rewriteOnlyVirtualUrls="true"
contextItemsPrefix="QueryString"
[code]...
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May 7, 2010
I'm interested in using ELMAH but need to configure it programmatically. We have existing infrastructure for determining connection strings and the like, and can't code them into Web.Config.How do I go about using ELMAH in this case?
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Jun 22, 2010
I'd like to configure ELMAH for an ASP.NET MVC site entirely in code. This includes registering the module, setting the logging provider and settings, and filtering exceptions.The only part I've managed to do so far is filter exceptions. Has anyone else figured out how to do this? I'd really like to avoid cluttering up my config file with settings that won't ever change.
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Aug 3, 2010
There used to be an article at ELMAHs docs site that contained this information, but it seems to have been removed. I think it's as simple as setting a configuration setting in the section, but I haven't a clue what it isCan anyone take a few seconds and drop the configuration setting here?
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Dec 1, 2010
I am using Elmah in one of our production deployments and would like to secure the module to the local network only and not expose it to the public. I am aware of the remote logging option that can be turned off and also asp.net authorization, however I am interested to know if there is any support in Elmah's configuration to bind to a secondary NIC/network card which only faces the internal network ?
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Mar 5, 2010
I'm using ELMAH to handle the exceptions in my ASP.Net MVC project. I would like to use it to log errors like database connection timeout, query connection timeout and others. Is this possible with ELMAH?
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Jun 10, 2010
I've just starting looking at a site in place at work. They're using Elmah to log errors.It seems to be logging fine, but in the web interface, when I tell Elmah to show me 100 errors per page, it only shows the most recent 15.Then when I click on "Download Log" I only get shown 15 errors in the CSV.Anyone know how I can configure it to keep all the errors?Or can someone point me to some docs on how to do this?
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Jan 31, 2010
How can I determine programmatically whether or not ELMAH is enabled?
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Feb 3, 2011
I'm using the suggestion from this question: How to get ELMAH to work with ASP.NET MVC [HandleError] attribute?I used Aziz's second code sample.I ran the debugger to see what happens when an error occurs. The main function in the HandleErrorAttribute class is:
public override void OnException(ExceptionContext context)
{
base.OnException(context);
[code]...
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