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exception error code c# Cumberland Center, Maine

Browse other questions tagged c# exception or ask your own question. Hoping it may help, Vanderghast, Access MVP "RSB" wrote in message news:U2*****************@news.cpqcorp.net... Hence we can restore the device to a // known state. You can "parse" the Exception.Message, or read the Exception.InnerException, or StackTrace, etc.

Thanks RSB Nov 16 '05 #5 P: n/a Nicholas Paldino [.NET/C# MVP] RSB, If you are trying to detect when a variable is set to null, and a property/method/field is trying you loose the context, the environment of the error, since the try scope is done, finish, out, dead. Since you would be handling exceptions raised from assemblies other than Microsoft.VisualBasic,I suggest you to write a catch statements for each exception type instead. In cases where an object state does not allow an operation, throw an instance of InvalidOperationException or an object based on a derivation of this class.

try { ProcessString(s); } catch (Exception e) { Console.WriteLine("{0} Exception caught.", e); } } } /* Output: System.ArgumentNullException: Value cannot be null. You can throw a new exception, with a new message, of with a message based on the existing message. For .NET 3.0, 3.5 and 4.0 you will have to use reflection to get the value of the HResult property as it is marked protected. This reasoning can be extended to any programming black-boxes such as a third-party library.

and the Exception object has a Message Property but i want to Catch the Error Number so that based on the Error number i can display Different error message.... At least, the following code does: try { string a = null; int i = a.Length; } catch(NullReferenceException ex) { return; } catch(Exception ex) { return; } Place a stop point This documentation is archived and is not being maintained. Nowadays, you use exceptions to notify client code or the user about problems.

C# C# Programming Guide Exceptions and Exception Handling Exceptions and Exception Handling Creating and Throwing Exceptions Creating and Throwing Exceptions Creating and Throwing Exceptions Using Exceptions Exception Handling Creating and Throwing class SecondLevelException : Exception { const int SecondLevelHResult = unchecked( (int)0x81234567 ); // Set HResult for this exception, and include it in // the exception message. Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies share|improve this answer answered Mar 17 '13 at 15:47 Andrew Moore 63.3k22132154 1 Note: This will only work as of .NET 4.5.

Do you have any idea? To catch the least specific exception, you can replace the throw statement in ProcessString with the following statement: throw new Exception().If you place the least-specific catch block first in the example, The original exception should be passed to the constructor of the ArgumentException as the InnerException parameter: C# Copy static int GetValueFromArray(int[] array, int index) { try { return array[index]; } catch if (errNum == x) { do x } else if ( errNum == y) { do y } } so how do i find the Error Number here..

Very good comment about it here. Regards, Sandeep Reply hfrmobile Member 3 Points 11 Posts Re: How catch exception codes / error code in C# Mar 22, 2010 07:09 AM|hfrmobile|LINK Thank you for your reply but I Now I'm work with C#, but don't see a reason that could make here a difference. –Hi-Angel Oct 3 '14 at 15:26 add a comment| 3 Answers 3 active oldest votes Source: stackoverflow.com/questions/15462675/… –curiousBoy Sep 29 '14 at 17:16 add a comment| up vote 4 down vote You should look at the members of the thrown exception, particularly .Message and .InnerException.

How is the Heartbleed exploit even possible? I need the thrown exceptions error code instead of its message , so that i based on the error code i show the right message to the user. You can also use a predicate expression that further examines the exception to decide whether to handle it. Awaiting a canceled task throws an OperationCanceledException.

Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! Something like: catch (BlahBlahException ex){ // do stuff } Also System.Exception has a HRESULT catch (Exception ex){ int code = ex.HResult; } share|improve this answer edited Sep 1 '14 at 23:00 Code example. Please give us feedback no matter whether you get your answer.

When you do this, specify the exception that you caught as the inner exception, as shown in the following example. public SecondLevelException( string message, Exception inner ) : base( string.Format( "(HRESULT:0x{1:X8}) {0}", message, SecondLevelHResult ), inner ) { HResult = SecondLevelHResult; } } class HResultDemo { public static void Main() { I dont want to search the error message for denied string or anything like that. please check it.

i mean what type of Exception i catch there. The following is signature, not part of post Please mark the post answered your question as the answer, and mark other helpful posts as helpful, so they will appear differently to The plumbing to do that is already built in, you just have to attach to it. 4) An app crash from an unhandled exception, while undesirable, is USEFUL. share|improve this answer answered Aug 3 '13 at 19:52 Antonio 1313 The error codes might also change for devices from different vendors, or for newer products from the same

to get more info about the nature of the error, but a try-catch is, by nature, a termination model, not a resumption model of error handling... ExamplesThe following code example defines a derived Exception class that sets the HResult property to a custom value in its constructor. Proper error handling (applicable to all mechanisms, and particular applicable to exception handling) requires careful reasoning as to the consequences and interpretation of each failed operation. In the case of a property setter, ParamName should be set to value.Public and protected methods members should throw exceptions whenever they cannot complete their intended functions.

Visual C++ MVP Monday, June 27, 2011 4:45 PM 0 Sign in to vote if it's win32 related u can access it through GetLastError()Mark Answered, if it solves your query Rohit Dev centers Windows Office Visual Studio Microsoft Azure More... A task can also end up in a canceled state if the asynchronous process that returns it is canceled. try{ } Catch (Exception ex) { errNum = ex.?????

In other cases, what sense to user of your code to know that it was -lets say - error #23452, that was occurred. to get more info about the nature of the error, but a try-catch is, by nature, a termination model, not a resumption model of error handling... You can "parse" the Exception.Message, or read the Exception.InnerException, or StackTrace, etc. The other reason, connected with the fear, is that we will have to cover all calls by try\catch blocks to stop to be afraid, but such a code will be pretty

You should use the Exception derived class, from the particular to the most general: catch(ArgumentOutOfRangeException ex) { ... } catch( ArgumentException ex) { ... } catch (SystemException ex) { ... } C# Copy catch (InvalidCastException e) { if (e.Data == null) { throw; } else { // Take some action. } } From inside a try block, initialize only variables that are try { } catch(FileNotFoundException ex) errorCode = ex. ????? } catch(SqlException ex) { errorCode = ex.Number; } For example: You can also handle and rethrow them.

Isn't that more expensive than an elevated system? The language specification is the definitive source for C# syntax and usage.

See AlsoC# Programming GuideExceptions and Exception Handling (C# Programming Guide)Exception HierarchyException Handling (C# Programming Guide) Show: Inherited Protected Print Export