Asp.net Error Object
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Exception Handling In Asp.net C#
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Asp.net Error Page
and is not being maintained. This documentation is archived and is not being maintained. Complete Example for Error Handlers Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 This code example includes elements for both page-level and application-level exception handling. Code Example Files The example consists of the following files: Web.config Global.asax Default.aspx ExceptionUtility (to be put in the App_Code folder) GenericErrorPage.aspx HttpErrorPage.aspx Http404ErrorPage.aspx DefaultRedirectErrorPage.aspx Web.config The following asp.net error logging example shows the Web.config file. The customErrors section specifies how to handle errors that occur with file types that are mapped to ASP.NET, such as .aspx, .asmx, and .ashx files. (In IIS 6.0 and in IIS 7.0 in classic mode, static content files such as .html and .jpg files are not mapped to ASP.NET.) The settings in the example customErrors section cause any unhandled HTTP 404 (file not found) errors to be directed to the Http404ErrorPage.aspx file. These HTTP 404 errors would occur if a request were made for an .aspx file, .asmx file, and so on and if the requested file did not exist. All other unhandled errors in ASP.NET files are directed to the DefaultRedirectErrorPage.aspx file. If static content files are not handled by ASP.NET, a request for a nonexistent .html or .jpg file does not cause a redirect to the Http404ErrorPage.aspx file. If you want ASP.NET to handle requests for all file types, you can configure IIS to map file-name extensions to ASP.NET. Note In the example, the mode attribute is set to "On" so that you can error messages when you run the example in Visual Studio. In a production environment, this setting would normally be "RemoteOnly". ASP.NET then renders error pages to ext
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings http://stackoverflow.com/questions/32866036/vb-net-error-object-in-c-sharp and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation http://stackoverflow.com/questions/4723801/asp-net-error-object-reference-not-set-to-an-instance-of-an-object Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it asp.net error only takes a minute: Sign up VB.Net Error object in C# up vote 0 down vote favorite I don't think there is a good way to do this... but I have a vb.Net DLL which has an error handling method. Its good, and I want to use it in my C#.Net site. So I add the vb.Net DLL to my C# asp.net error handling project. But wait! My vb.Net error handler method requires a 'Microsoft.VisualBasic.ErrObject' ! Hmm.. is it possible to create such a data type in C#? Even by some type of conversion? Or is this just ugly and should I forget about even trying something so outrageous and just restart the project in vb.Net? *note that I am not going to change the required data type in the DLL Thanks! c# asp.net .net vb.net error-handling share|improve this question asked Sep 30 '15 at 12:24 Christopher 139112 @TimSchmelter - Any suggestions on my problem? - stackoverflow.com/questions/32800427/… –Rahul Singh Sep 30 '15 at 12:26 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote You can add a reference to the Microsoft.VisualBasic dll to your C# project. Right-click the References in the solution explorer click Add Reference,then search for Microsoft.VisualBasic: How to: Add or Remove References By Using the Add Reference Dialog Box But in general i would suggest to use the .NET error handling with exceptions that inherit from or are System.Exception and support using try-catc
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up ASP.NET Error Object reference not set to an instance of an object up vote 0 down vote favorite Object reference not set to an instance of an object I am getting this error sometimes. I have a page where I load questions and for some question system generate this error. Why do I get this error? Please help me. asp.net share|improve this question edited Jan 18 '11 at 12:08 tdammers 16.1k2447 asked Jan 18 '11 at 12:03 sumit 111 Have you got any exception handling in place? Catch and rethrow the exception and examine the stack trace. –tomasmcguinness Jan 18 '11 at 12:06 It means the object hasn't been given a value and therefore defaults to null. With the info you give that's the best answer you get. (paste relevant code!) –Jeroen Jan 18 '11 at 12:06 1 I disagree with the close vote. It's a real question, it just doesn't contain enough information to give a useful answer. –tdammers Jan 18 '11 at 12:09 wht more you want to answer the question –sumit Jan 18 '11 at 12:26 add a comment| 3 Answers 3 active oldest votes up vote 2 down vote It means that somewhere something dereferences a null reference. Crude example: Foobar foo = null; foo.DoSomething(); // this line will trigger a NullReferenceException Here's what you can do: compile in debug mode run it until it crashes examine the stack trace; it will tell you where the exception originates (unless you're doing stupid things like catching and rethrowing improperly). You may have to follow the chain of inner exceptions if that doesn't provide sufficient information, step through your code with a debugger until right before the call that makes it crash. Examine any variables that might be null. Once you have found the culprit, you need to find out why it is null and what to do about it. The solution can be one of: fix incorrect program logic that causes something to be null that shouldn't be check if something is null before dereferencing it handle the exception at a point that makes sense, and translate it i