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• JavaScript Intellisense Improvements with VS 2010

  - by ScottGu

  This is the twentieth in a series of blog posts I’m doing on the upcoming VS 2010 and .NET 4 release.  Today’s blog post covers some of the nice improvements coming with JavaScript intellisense with VS 2010 and the free Visual Web Developer 2010 Express.  You’ll find with VS 2010 that JavaScript Intellisense loads much faster for large script files and with large libraries, and that it now provides statement completion support for more advanced scenarios compared to previous versions of Visual Studio. [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] Improved JavaScript Intellisense Providing Intellisense for a dynamic language like JavaScript is more involved than doing so with a statically typed language like VB or C#.  Correctly inferring the shape and structure of variables, methods, etc is pretty much impossible without pseudo-executing the actual code itself – since JavaScript as a language is flexible enough to dynamically modify and morph these things at runtime.  VS 2010’s JavaScript code editor now has the smarts to perform this type of pseudo-code execution as you type – which is how its intellisense completion is kept accurate and complete.  Below is a simple walkthrough that shows off how rich and flexible it is with the final release. Scenario 1: Basic Type Inference When you declare a variable in JavaScript you do not have to declare its type.  Instead, the type of the variable is based on the value assigned to it.  Because VS 2010 pseudo-executes the code within the editor, it can dynamically infer the type of a variable, and provide the appropriate code intellisense based on the value assigned to a variable. For example, notice below how VS 2010 provides statement completion for a string (because we assigned a string to the “foo” variable): If we later assign a numeric value to “foo” the statement completion (after this assignment) automatically changes to provide intellisense for a number: Scenario 2: Intellisense When Manipulating Browser Objects It is pretty common with JavaScript to manipulate the DOM of a page, as well as work against browser objects available on the client.  Previous versions of Visual Studio would provide JavaScript statement completion against the standard browser objects – but didn’t provide much help with more advanced scenarios (like creating dynamic variables and methods).  VS 2010’s pseudo-execution of code within the editor now allows us to provide rich intellisense for a much broader set of scenarios. For example, below we are using the browser’s window object to create a global variable named “bar”.  Notice how we can now get intellisense (with correct type inference for a string) with VS 2010 when we later try and use it: When we assign the “bar” variable as a number (instead of as a string) the VS 2010 intellisense engine correctly infers its type and modifies statement completion appropriately to be that of a number instead: Scenario 3: Showing Off Because VS 2010 is psudo-executing code within the editor, it is able to handle a bunch of scenarios (both practical and wacky) that you throw at it – and is still able to provide accurate type inference and intellisense. For example, below we are using a for-loop and the browser’s window object to dynamically create and name multiple dynamic variables (bar1, bar2, bar3…bar9).  Notice how the editor’s intellisense engine identifies and provides statement completion for them: Because variables added via the browser’s window object are also global variables – they also now show up in the global variable intellisense drop-down as well: Better yet – type inference is still fully supported.  So if we assign a string to a dynamically named variable we will get type inference for a string.  If we assign a number we’ll get type inference for a number.  Just for fun (and to show off!) we could adjust our for-loop to assign a string for even numbered variables (bar2, bar4, bar6, etc) and assign a number for odd numbered variables (bar1, bar3, bar5, etc): Notice above how we get statement completion for a string for the “bar2” variable.  Notice below how for “bar1” we get statement completion for a number:   This isn’t just a cool pet trick While the above example is a bit contrived, the approach of dynamically creating variables, methods and event handlers on the fly is pretty common with many Javascript libraries.  Many of the more popular libraries use these techniques to keep the size of script library downloads as small as possible.  VS 2010’s support for parsing and pseudo-executing libraries that use these techniques ensures that you get better code Intellisense out of the box when programming against them. Summary Visual Studio 2010 (and the free Visual Web Developer 2010 Express) now provide much richer JavaScript intellisense support.  This support works with pretty much all popular JavaScript libraries.  It should help provide a much better development experience when coding client-side JavaScript and enabling AJAX scenarios within your ASP.NET applications. Hope this helps, Scott P.S. You can read my previous blog post on VS 2008’s JavaScript Intellisense to learn more about our previous JavaScript intellisense (and some of the scenarios it supported).  VS 2010 obviously supports all of the scenarios previously enabled with VS 2008.

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• Is it feasible and useful to auto-generate some code of unit tests?

  - by skiwi

  Earlier today I have come up with an idea, based upon a particular real use case, which I would want to have checked for feasability and usefulness. This question will feature a fair chunk of Java code, but can be applied to all languages running inside a VM, and maybe even outside. While there is real code, it uses nothing language-specific, so please read it mostly as pseudo code. The idea Make unit testing less cumbersome by adding in some ways to autogenerate code based on human interaction with the codebase. I understand this goes against the principle of TDD, but I don't think anyone ever proved that doing TDD is better over first creating code and then immediatly therafter the tests. This may even be adapted to be fit into TDD, but that is not my current goal. To show how it is intended to be used, I'll copy one of my classes here, for which I need to make unit tests. public class PutMonsterOnFieldAction implements PlayerAction { private final int handCardIndex; private final int fieldMonsterIndex; public PutMonsterOnFieldAction(final int handCardIndex, final int fieldMonsterIndex) { this.handCardIndex = Arguments.requirePositiveOrZero(handCardIndex, "handCardIndex"); this.fieldMonsterIndex = Arguments.requirePositiveOrZero(fieldMonsterIndex, "fieldCardIndex"); } @Override public boolean isActionAllowed(final Player player) { Objects.requireNonNull(player, "player"); Hand hand = player.getHand(); Field field = player.getField(); if (handCardIndex >= hand.getCapacity()) { return false; } if (fieldMonsterIndex >= field.getMonsterCapacity()) { return false; } if (field.hasMonster(fieldMonsterIndex)) { return false; } if (!(hand.get(handCardIndex) instanceof MonsterCard)) { return false; } return true; } @Override public void performAction(final Player player) { Objects.requireNonNull(player); if (!isActionAllowed(player)) { throw new PlayerActionNotAllowedException(); } Hand hand = player.getHand(); Field field = player.getField(); field.setMonster(fieldMonsterIndex, (MonsterCard)hand.play(handCardIndex)); } } We can observe the need for the following tests: Constructor test with valid input Constructor test with invalid inputs isActionAllowed test with valid input isActionAllowed test with invalid inputs performAction test with valid input performAction test with invalid inputs My idea mainly focuses on the isActionAllowed test with invalid inputs. Writing these tests is not fun, you need to ensure a number of conditions and you check whether it really returns false, this can be extended to performAction, where an exception needs to be thrown in that case. The goal of my idea is to generate those tests, by indicating (through GUI of IDE hopefully) that you want to generate tests based on a specific branch. The implementation by example User clicks on "Generate code for branch if (handCardIndex >= hand.getCapacity())". Now the tool needs to find a case where that holds. (I haven't added the relevant code as that may clutter the post ultimately) To invalidate the branch, the tool needs to find a handCardIndex and hand.getCapacity() such that the condition >= holds. It needs to construct a Player with a Hand that has a capacity of at least 1. It notices that the capacity private int of Hand needs to be at least 1. It searches for ways to set it to 1. Fortunately it finds a constructor that takes the capacity as an argument. It uses 1 for this. Some more work needs to be done to succesfully construct a Player instance, involving the creation of objects that have constraints that can be seen by inspecting the source code. It has found the hand with the least capacity possible and is able to construct it. Now to invalidate the test it will need to set handCardIndex = 1. It constructs the test and asserts it to be false (the returned value of the branch) What does the tool need to work? In order to function properly, it will need the ability to scan through all source code (including JDK code) to figure out all constraints. Optionally this could be done through the javadoc, but that is not always used to indicate all constraints. It could also do some trial and error, but it pretty much stops if you cannot attach source code to compiled classes. Then it needs some basic knowledge of what the primitive types are, including arrays. And it needs to be able to construct some form of "modification trees". The tool knows that it needs to change a certain variable to a different value in order to get the correct testcase. Hence it will need to list all possible ways to change it, without using reflection obviously. What this tool will not replace is the need to create tailored unit tests that tests all kinds of conditions when a certain method actually works. It is purely to be used to test methods when they invalidate constraints. My questions: Is creating such a tool feasible? Would it ever work, or are there some obvious problems? Would such a tool be useful? Is it even useful to automatically generate these testcases at all? Could it be extended to do even more useful things? Does, by chance, such a project already exist and would I be reinventing the wheel? If not proven useful, but still possible to make such thing, I will still consider it for fun. If it's considered useful, then I might make an open source project for it depending on the time. For people searching more background information about the used Player and Hand classes in my example, please refer to this repository. At the time of writing the PutMonsterOnFieldAction has not been uploaded to the repo yet, but this will be done once I'm done with the unit tests.

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• CA2000 passing object reference to base constructor in C#

  - by Timothy

  I receive a warning when I run some code through Visual Studio's Code Analysis utility which I'm not sure how to resolve. Perhaps someone here has come across a similar issue, resolved it, and is willing to share their insight. I'm programming a custom-painted cell used in a DataGridView control. The code resembles: public class DataGridViewMyCustomColumn : DataGridViewColumn { public DataGridViewMyCustomColumn() : base(new DataGridViewMyCustomCell()) { } It generates the following warning: CA2000 : Microsoft.Reliability : In method 'DataGridViewMyCustomColumn.DataGridViewMyCustomColumn()' call System.IDisposable.Dispose on object 'new DataGridViewMyCustomCell()' before all references to it are out of scope. I understand it is warning me DataGridViewMyCustomCell (or a class that it inherits from) implements the IDisposable interface and the Dispose() method should be called to clean up any resources claimed by DataGridViewMyCustomCell when it is no longer. The examples I've seen on the internet suggest a using block to scope the lifetime of the object and have the system automatically dispose it, but base isn't recognized when moved into the body of the constructor so I can't write a using block around it... which I'm not sure I'd want to do anyway, since wouldn't that instruct the run time to free the object which could still be used later inside the base class? My question then, is the code okay as is? Or, how could it be refactored to resolve the warning? I don't want to suppress the warning unless it is truly appropriate to do so.

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• How to extract $lastexitcode from c# powershell script execution.

  - by scope-creep

  Hi, I've got a scipt executing in C# using the powershell async execution code on code project here: http://www.codeproject.com/KB/threads/AsyncPowerShell.aspx?display=PrintAll&fid=407636&df=90&mpp=25&noise=3&sort=Position&view=Quick&select=2130851#xx2130851xx I need to return the $lastexitcode and Jean-Paul describes how you can use a custom pshost class to return it. I can't find any method or property in pshost that returns the exit code. This engine I have needs to ensure that script executes correctly. Any help would be appreciated. regards Bob. Its the $lastexitcode and the $? variables I need to bring back. Hi, Finally answered. I found out about the $host variable. It implements a callback into the host, specifically a custom PSHost object, enabling you to return the $lastexitcode. Here is a link to an explanation of $host. http://mshforfun.blogspot.com/2006/08/do-you-know-there-is-host-variable.html It seems to be obscure, badly documented, as usual with powershell docs. Using point 4, calling $host.SetShouldExit(1) returns 1 to the SetShouldExit method of pshost, as described here. http://msdn.microsoft.com/en-us/library/system.management.automation.host.pshost.setshouldexit(VS.85).aspx Its really depends on defining your own exit code defintion. 0 and 1 suffixes I guess. regards Bob.

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• Frame Buster Buster ... buster code needed

  - by Jeff Atwood

  Let's say you don't want other sites to "frame" your site in an <iframe>: <iframe src="http://yourwebsite.com"></iframe> So you insert anti-framing, frame busting JavaScript into all your pages: /* break us out of any containing iframes */ if (top != self) { top.location.replace(self.location.href); } Excellent! Now you "bust" or break out of any containing iframe automatically. Except for one small problem. As it turns out, your frame-busting code can be busted, as shown here: <script type="text/javascript"> var prevent_bust = 0 window.onbeforeunload = function() { prevent_bust++ } setInterval(function() { if (prevent_bust > 0) { prevent_bust -= 2 window.top.location = 'http://server-which-responds-with-204.com' } }, 1) </script> This code does the following: increments a counter every time the browser attempts to navigate away from the current page, via the window.onbeforeonload event handler sets up a timer that fires every millisecond via setInterval(), and if it sees the counter incremented, changes the current location to a server of the attacker's control that server serves up a page with HTTP status code 204, which does not cause the browser to nagivate anywhere My question is -- and this is more of a JavaScript puzzle than an actual problem -- how can you defeat the frame-busting buster? I had a few thoughts, but nothing worked in my testing: attempting to clear the onbeforeunload event via onbeforeonload = null had no effect adding an alert() stopped the process let the user know it was happening, but did not interfere with the code in any way; clicking OK lets the busting continue as normal I can't think of any way to clear the setInterval() timer I'm not much of a JavaScript programmer, so here's my challenge to you: hey buster, can you bust the frame-busting buster?

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• Getting Response from TIdHttp with Error Code 400

  - by Robert Love

  I have been writing a Delphi library for StackApps API. I have run into a problem with Indy. I am using the version that ships with Delphi 2010. If you pass invalid parameters to one of the StackApps API it will return a HTTP Error Code 400 and then in the response it will contain a JSON object with more details. By visiting http://api.stackoverflow.com/0.8/stats/?Key=BadOnPurpose in Chrome Browser you can see an Example. I.E. and Firefox hide the JSON. Using WireShark I can see that the JSON object is returned using the code below, but I am unable to access it using Indy. For this test code I dropped a TIdHttp component on the form and placed the following code in a button click. procedure TForm10.Button2Click(Sender: TObject); var SS : TStringStream; begin SS := TStringStream.Create; IdHTTP1.Get('http://api.stackoverflow.com/0.8/stats/?Key=BadOnPurpose',SS,[400]); Memo1.Lines.Text := SS.DataString; SS.Free; end; I passed [400] so that it would not raise the 400 exception. It is as if Indy stopped reading the response. As the contents of Memo1 are empty. I am looking for a way to get the JSON Details.

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• Pause code execution until UIAlertView button is pressed?

  - by JuBu1324

  One of my methods sends a message to an object (what do you know about that), and expects a BOOL for an answer. However, BOOL answer it is expecting is based on the answer to a UIAlertView created in the receiving object's method. However, the code doesn't pause while waiting for the user to answer the UIAlertView. My problem is: how do I use -alertView:clickedButtonAtIndex in the method's return value? Here's the code the message runs (in this construction, I was expecting navigateAwayFromTab to change based on the user input in the UIAlertView, but it never gets a chance): - (BOOL)readyToNavigateAwayFromTab { NSLog( @"message received by Medical View"); navigateAwayFromTab = NO; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Navigate Away From Tab?" message:@"Navigating away from this tab will save your work." delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil ]; [alert show]; [alert release]; return navigateAwayFromTab; } #define CANCEL 0 #define OK 1 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { if( buttonIndex == OK ) navigateAwayFromTab = YES; } I've been reading up on the modal UIAlertView debate, and I agree with apple's implementation - at lest as the rule. However, in this case I don't see any way of solving the problem by putting code in -alertView:clickedButtonAtIndex because I don't need to run code based on the UIAlertView, I just need to read the response. Any suggestions on how I can reach my gaol? I've tried a while loop after [alert show] already, but then the alert doesn't even show then, and for a number of reasons I can't use -viewWillDisapear.

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• Convert CRC-CCITT Kermit 16 DELPHI code to C#

  - by Mehdi Anis

  I am working on a function that will give me a Kermit CRC value from a HEX string. I have a piece of code in DELPHI. I am a .NET developer and need the code in C#. function CRC_16(cadena : string):word; var valuehex : word; i: integer; CRC : word; Begin CRC := 0; for i := 1 to length(cadena) do begin valuehex := ((ord(cadena[i]) XOR CRC) AND $0F) * $1081; CRC := CRC SHR 4; CRC := CRC XOR valuehex; valuehex := (((ord(cadena[i]) SHR 4) XOR LO(CRC)) AND $0F); CRC := CRC SHR 4; CRC := CRC XOR (valuehex * $1081); end; CRC_16 := (LO(CRC) SHL 8) OR HI(CRC); end; I got the code from this webpage: Kermit CRC in DELPHI I guess that Delphi function is correct. If any one can please convert the code to C# that will be great. I tried to convert to C#, but got lost in WORD data type and the LO function of Delphi. Thank you all.

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• Debuging CUDA kernels called from .NET code in VS2008, emulation mode

  - by Danny Varod

  CUDA has an option to compile code in emulation mode, which is supported in the .rules file they provide. I have C# .NET 3.5 SP1 code that calls a native dll, using DllImport, the native dll is compiled via VS2008 using nvcc and its function is to transfer memory from and to CUDA and to invoke CUDA kernels. When the CUDA kernels are correct, everything runs fine, but when there is a bug, I can only step in to the code until the title of the kernels and see the parameters they receive. (I enabled debugging native code in the startup-project's debug options.) I have tried compiling with emulation mode, however I get the CUDA error "mixed device execution" when calling the CUDA memcopy host--device. I tried switching the alloc+dealloc+memcopy with their equivalent non-CUDA versions, but then the same error occurs when invoking the kernels. What did I do wrong in my attempt to using the debug-emulation mode? P.S. I tried this on Vista x64 SP1 + VS2008, with the same solution complied in both x86 and x64, neither worked in emulation mode, both worked in non-emulation mode.

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• Cannot see named Silverlight control in code

  - by Alexandra

  In my first few hours with Silverlight 3, as an avid WPF user, I am greatly disappointed at the many things it doesn't support. This seems like an odd issue to me and it's so generic that I cannot find anything online about it. I have the following XAML: <controls:TabControl x:Name="workspacesTabControl" Grid.Row="1" Background="AntiqueWhite" ItemsSource="{Binding Workspaces, ElementName=_root}"/> However, I cannot see the workspacesTabControl in code-behind. I thought maybe IntelliSense is just being mean and tried to go ahead and compile it anyway, but got an error: Error 1 The name 'workspacesTabControl' does not exist in the current context How do I access controls in code-behind? EDIT: I realized I've pasted the wrong error - I have two controls inside the UserControl called workspacesTabControl and menuStrip. I cannot get to either one of them by their name in the code-behind. Just in case, here is the XAML for the menuStrip: <controls:TreeView Grid.ColumnSpan="2" Height="100" x:Name="menuStrip" ItemContainerStyle="{StaticResource MenuStripStyle}" ItemsSource="{Binding Menu, ElementName=_root}"/> EDIT AGAIN: I'm not sure if this is helpful, but I've taken a look at the InitializeComponent() code and here's what I saw: [System.Diagnostics.DebuggerNonUserCodeAttribute()] public void InitializeComponent() { if (_contentLoaded) { return; } _contentLoaded = true; System.Windows.Application.LoadComponent(this, new System.Uri("/SapphireApplication;component/SapphireMain.xaml", System.UriKind.Relative)); } It seems that it simply loads the XAML when it runs (not before or during compilation) so the menuStrip and workspacesTabControl names don't actually get registered anywhere (as they usually are in WPF/win Forms). Could that attribute be a problem? And where do I get rid of this requirement for all the future UserControls I make?

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• Source-to-source compiler framework wanted

  - by cheungcc_2000

  Dear all, I used to use OpenC++ (http://opencxx.sourceforge.net/opencxx/html/overview.html) to perform code generation like: Source: class MyKeyword A { public: void myMethod(inarg double x, inarg const std::vector<int>& y, outarg double& z); }; Generated: class A { public: void myMethod(const string& x, double& y); // generated method below: void _myMehtod(const string& serializedInput, string& serializedOutput) { double x; std::vector<int> y; // deserialized x and y from serializedInput double z; myMethod(x, y, z); } }; This kind of code generation directly matches the use case in the tutorial of OpenC++ (http://www.csg.is.titech.ac.jp/~chiba/opencxx/tutorial.pdf) by writing a meta-level program for handling "MyKeyword", "inarg" and "outarg" and performing the code generation. However, OpenC++ is sort of out-of-date and inactive now, and my code generator can only work on g++ 3.2 and it triggers error on parsing header files of g++ of higher version. I have looked at VivaCore, but it does not provide the infra-structure for compiling meta-level program. I'm also looking at LLVM, but I cannot find documentation that tutor me on working out my source-to-source compilation usage. I'm also aware of the ROSE compiler framework, but I'm not sure whether it suits my usage, and whether its proprietary C++ front-end binary can be used in a commercial product, and whether a Windows version is available. Any comments and pointers to specific tutorial/paper/documentation are much appreciated.

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• why i add more insignificant code but cost less time

  - by user3714382

  i write a method and when i add some insignificant code it works faster, like these : array[1]=array[1]; array[0]=array[0]; array[3]=array[3]; array[2]=array[2]; i use double t=System.currentTimeMillis(); at first to record the time. then call the method and use System.out.println(System.currentTimeMillis()-t); in the end. when i delete the code (array[1]=array[1];...) the cost time is 1035.0 ms,but if i add these code, the cost time become 898.0ms. here is my method and my code. PS:this method is use for the game 2048, exp: {2,2,2,2} trans to {0,0,4,4} static void toRight2(int[] array){ if (array[2]==array[3] ) { array[3]=array[2]*2; if (array[0]==array[1]) { array[2]=array[1]*2; array[0]=0; array[1]=0; }else { array[2]=array[1]; array[1]=array[0]; array[0]=0; } } else{ if (array[0]==array[1]) { array[1]=array[1]*2; array[0]=0; array[3]=array[3]; array[2]=array[2]; }else { array[1]=array[1];//delete this cost more time array[0]=array[0];//delete this cost more time array[3]=array[3];//delete this cost more time array[2]=array[2];//delete this cost more time } } } public static void main(String[] args) { double t=System.currentTimeMillis(); int[] array={1,2,3,3}; for (int j = 2; j <400*1000000; j++) { toRight2(array); } System.out.println(System.currentTimeMillis()-t); }

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• Best Youtube embed player sizes?

  - by Xeoncross

  I use tumblr to share videos and, unfortunately, when re-posting a video to your tumblelog it uses the embed code at 400x336px. This is neither widescreen nor very large. So I'm trying to set the player to better size and I'm finding that the youtube player really comes in many sizes. For example, when copying the embed code for and HD video I get the sizes 560x340, 640x385, and 853x505. Then when I look at the embed code for a SD video I get the sizes 425x344, 480x385, and 640x505. I was having the best luck with setting the player to 640 x 505 as it was large enough for HD and perfect for SD. print str_replace( array('400', '336'), array('640', '505'), $video_player_html); Has anyone dealt with trying to find a good standard embed size for a site? One thing that would make this a lot easier is to know whether the video was HD or not - however, that info is not provided in the embed code. I guess I am actually more interested in knowing the right ratio (or specific size) to use that works the best for youtube's mixed content.

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• help in the Donalds B. Johnson's algorithm, i cannot understand the pseudo code

  - by Pitelk

  Hi , does anyone know the Donald B. Johnson's algorithm which enumarates all the elementary circuits (cycles) in a Directed graph? link text I have the paper he had published in 1975 but I cannot understand the pseudo-code. My goal is to implement this algorithm in java. Some questions i have is for example what is the matrix Ak it refers to. In the pseudo code mentions that Ak:=adjacency structure of strong component K with least vertex in subgraph of G induced by {s,s+1,....n}; Does that mean i have to implement another algorithm that finds the Ak matrix? Another question is what the following means? begin logical f; Does also the line "logical procedure CIRCUIT (integer value v);" means that the circuit procedure returns a logical variable. In the pseudo code also has the line "CIRCUIT := f;" . Does this mean? It would be great if someone could translate this 1970's pseudocode to a more modern type of pseudo code so i can understand it in case you are interested to help but you cannot find the paper please email me at [email protected] and i will send you the paper. Thanks in advance

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• Design by contract: predict methods needed, discipline yourself and deal with code that comes to min

  - by fireeyedboy

  I like the idea of designing by contract a lot (at least, as far as I understand the principal). I believe it means you define intefaces first before you start implementing actual code, right? However, from my limited experience (3 OOP years now) I usually can't resist the urge to start coding pretty early, for several reasons: because my limited experience has shown me I am unable to predict what methods I will be needing in the interface, so I might as well start coding right away. or because I am simply too impatient to write out the whole interfaces first. or when I do try it, I still wind up implementing bits of code already, because I fear I might forget this or that imporant bit of code, that springs to mind when I am designing the interfaces. As you see, especially with the last two points, this leads to a very disorderly way of doing thing. Tasks get mixed up. I should draw a clear line between designing interfaces and actual coding. If you, unlike me, are a good/disciplined planner, as intended above, how do you: ...know the majority of methods you will be needing up front so well? Especially if it's components that implement stuff you are not familiar with yet. ...keep yourself from resisting the urge to start coding right away? ...deal with code that comes to mind when you are designing the intefaces?

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• Obtaining information about executable code from exe/pdb

  - by Miro Kropacek

  Hello, I need to extract code (but not data!) from classic win32 exe/dll files. It's clear I can't do this only with extraction of code segment content (because code segment contains also the data -- jump tables for example) and that I need some help from compiler. *.map files are nice but they only contain addresses of functions, i.e. the safest thing I can do is to start at that address and to process until the first return / jump instruction (because part of the function could be mentioned data) *.pdb files are better but I'm not sure what tools to use to extract information like this -- I took a look at DbgHelp and DIA SDK, the latter one seems to be the right tool but it doesn't look very simple. So my question/questions: To your knowledge, it is possible to extract information about code/data position (address + length) only via DbgHelp? If the DIA SDK is the only way, any idea what should I call for getting information like that? (that COM stuff is pretty heavy) Is there any other way? Of course my concern is about Visual Studio, C/C++ source compilation in the first place. Thanks for any hint.

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• Optimizing code using PIL

  - by freakazo

  Firstly sorry for the long piece of code pasted below. This is my first time actually having to worry about performance of an application so I haven't really ever worried about performance. This piece of code pretty much searches for an image inside another image, it takes 30 seconds to run on my computer, converting the images to greyscale and other changes shaved of 15 seconds, I need another 15 shaved off. I did read a bunch of pages and looked at examples but I couldn't find the same problems in my code. So any help would be greatly appreciated. From the looks of it (cProfile) 25 seconds is spent within the Image module, and only 5 seconds in my code. from PIL import Image import os, ImageGrab, pdb, time, win32api, win32con import cProfile def GetImage(name): name = name + '.bmp' try: print(os.path.join(os.getcwd(),"Images",name)) image = Image.open(os.path.join(os.getcwd(),"Images",name)) except: print('error opening image;', name) return image def Find(name): image = GetImage(name) imagebbox = image.getbbox() screen = ImageGrab.grab() #screen = Image.open(os.path.join(os.getcwd(),"Images","Untitled.bmp")) YLimit = screen.getbbox()[3] - imagebbox[3] XLimit = screen.getbbox()[2] - imagebbox[2] image = image.convert("L") Screen = screen.convert("L") Screen.load() image.load() #print(XLimit, YLimit) Found = False image = image.getdata() for y in range(0,YLimit): for x in range(0,XLimit): BoxCoordinates = x, y, x+imagebbox[2], y+imagebbox[3] ScreenGrab = screen.crop(BoxCoordinates) ScreenGrab = ScreenGrab.getdata() if image == ScreenGrab: Found = True #print("woop") return x,y if Found == False: return "Not Found" cProfile.run('print(Find("Login"))')

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• Excel 2003 VBA - Method to duplicate this code that select and colors rows

  - by Justin

  so this is a fragment of a procedure that exports a dataset from access to excel Dim rs As Recordset Dim intMaxCol As Integer Dim intMaxRow As Integer Dim objxls As Excel.Application Dim objWkb As Excel.Workbook Dim objSht As Excel.Worksheet Set rs = CurrentDb.OpenRecordset("qryOutput", dbOpenSnapshot) intMaxCol = rs.Fields.Count If rs.RecordCount > 0 Then rs.MoveLast: rs.MoveFirst intMaxRow = rs.RecordCount Set objxls = New Excel.Application objxls.Visible = True With objxls Set objWkb = .Workbooks.Add Set objSht = objWkb.Worksheets(1) With objSht On Error Resume Next .Range(.Cells(1, 1), .Cells(intMaxRow, intMaxCol)).CopyFromRecordset rs .Name = conSHT_NAME .Cells.WrapText = False .Cells.EntireColumn.AutoFit .Cells.RowHeight = 17 .Cells.Select With Selection.Font .Name = "Calibri" .Size = 10 End With .Rows("1:1").Select With Selection .Insert Shift:=xlDown End With .Rows("1:1").Interior.ColorIndex = 15 .Rows("1:1").RowHeight = 30 .Rows("2:2").Select With Selection.Interior .ColorIndex = 40 .Pattern = xlSolid End With .Rows("4:4").Select With Selection.Interior .ColorIndex = 40 .Pattern = xlSolid End With .Rows("6:6").Select With Selection.Interior .ColorIndex = 40 .Pattern = xlSolid End With .Rows("1:1").Select With Selection.Borders(xlEdgeBottom) .LineStyle = xlContinuous .Weight = xlMedium .ColorIndex = xlAutomatic End With End With End With End If Set objSht = Nothing Set objWkb = Nothing Set objxls = Nothing Set rs = Nothing Set DB = Nothing End Sub see where I am looking at coloring the rows. I wanted to select and fill (with any color) every other row, kinda like some of those access reports. I can do it manually coding each and every row, but two problems: 1) its a pain 2) i don't know what the record count is before hand. How can I make the code more efficient in this respect while incorporating the recordcount to know how many rows to "loop through" EDIT: Another question I have is with the selection methods I am using in the module, is there a better excel syntax instead of these with selections.... .Cells.Select With Selection.Font .Name = "Calibri" .Size = 10 End With is the only way i figure out how to accomplish this piece, but literally every other time I run this code, it fails. It says there is no object and points to the .font ....every other time? is this because the code is poor, or that I am not closing the xls app in the code? if so how do i do that? Thanks as always!

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• Experience migrating legacy Cobol/PL1 to Java

  - by MadMurf

  ORIGINAL Q: I'm wondering if anyone has had experience of migrating a large Cobol/PL1 codebase to Java? How automated was the process and how maintainable was the output? How did the move from transactional to OO work out? Any lessons learned along the way or resources/white papers that may be of benefit would be appreciated. EDIT 7/7: Certainly the NACA approach is interesting, the ability to continue making your BAU changes to the COBOL code right up to the point of releasing the JAVA version has merit for any organization. The argument for procedural Java in the same layout as the COBOL to give the coders a sense of comfort while familiarizing with the Java language is a valid argument for a large organisation with a large code base. As @Didier points out the $3mil annual saving gives scope for generous padding on any BAU changes going forward to refactor the code on an ongoing basis. As he puts it if you care about your people you find a way to keep them happy while gradually challenging them. The problem as I see it with the suggestion from @duffymo to Best to try and really understand the problem at its roots and re-express it as an object-oriented system is that if you have any BAU changes ongoing then during the LONG project lifetime of coding your new OO system you end up coding & testing changes on the double. That is a major benefit of the NACA approach. I've had some experience of migrating Client-Server applications to a web implementation and this was one of the major issues we encountered, constantly shifting requirements due to BAU changes. It made PM & scheduling a real challenge. Thanks to @hhafez who's experience is nicely put as "similar but slightly different" and has had a reasonably satisfactory experience of an automatic code migration from Ada to Java. Thanks @Didier for contributing, I'm still studying your approach and if I have any Q's I'll drop you a line.

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• What is happening in this T-SQL code?

  - by Ben McCormack

  I'm just starting to learn T-SQL and could use some help in understanding what's going on in a particular block of code. I modified some code in an answer I received in a previous question, and here is the code in question: DECLARE @column_list AS varchar(max) SELECT @column_list = COALESCE(@column_list, ',') + 'SUM(Case When Sku2=' + CONVERT(varchar, Sku2) + ' Then Quantity Else 0 End) As [' + CONVERT(varchar, Sku2) + ' - ' + Convert(varchar,Description) +'],' FROM OrderDetailDeliveryReview Inner Join InvMast on SKU2 = SKU and LocationTypeID=4 GROUP BY Sku2 , Description ORDER BY Sku2 Set @column_list = Left(@column_list,Len(@column_list)-1) Select @column_list ---------------------------------------- 1 row is returned: ,SUM(Case When Sku2=157 Then Quantity Else 0 End) As [157 -..., SUM(Case ... The T-SQL code does exactly what I want, which is to make a single result based on the results of a query, which will then be used in another query. However, I can't figure out how the SELECT @column_list =... statement is putting multiple values into a single string of characters by being inside a SELECT statement. Without the assignment to @column_list, the SELECT statement would simply return multiple rows. How is it that by having the variable within the SELECT statement that the results get "flattened" down into one value? How should I read this T-SQL to properly understand what's going on?

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• Producing Mini Dumps for _caught_ SEH exceptions in mixed code DLL

  - by Assaf Lavie

  I'm trying to use code similar to clrdump to create mini dumps in my managed process. This managed process invokes C++/CLI code which invokes some native C++ static lib code, wherein SEH exceptions may be thrown (e.g. the occasional access violation). C# WinForms -> C++/CLI DLL -> Static C++ Lib -> ACCESS VIOLATION Our policy is to produce mini dumps for all SEH exceptions (caught & uncaught) and then translate them to C++ exceptions to be handled by application code. This works for purely native processes just fine; but when the application is a C# application - not so much. The only way I see to produce dumps from SEH exceptions in a C# process is to not catch them - and then, as unhandled exceptions, use the Application.ThreadException handler to create a mini dump. The alternative is to let the CLR translate the SEH exception into a .Net exception and catch it (e.g. System.AccessViolationException) - but that would mean no dump is created, and information is lost (stack trace information in Exception isn't as rich as the mini dump). So how can I handle SEH exceptions by both creating a minidump and translating the exception into a .Net exception so that my application may try to recover?

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• ActionScript 3.0: placing code on stage/MC timelines a la AS2 instead of in classes

  - by BoltClock

  I'm aware that ActionScript 3.0 is designed from the ground up to be a largely object-oriented language and using it means less or even no timeline code in Flash documents. I'm quite experienced with OOP and am comfortable writing classes. However, since I mostly use Flash for animations, I hardly ever need to write ActionScript code other than for preloaders, subtitles, quality controls, website links and so on. In fact, I still set my Flash movies to use AS2 to this day because I'm used to gotoAndPlay()/gotoAndStop(), AS2 preloaders, subtitles, quality controls and even getURL(). Of course, I really want to move on now that practically everyone's on Flash Player 9 or 10 and now that I've dabbled with other OO languages like Java, C# and Objective-C too. I'm a complete newcomer to AS3 and am not very learned with AS2 either. Considering my current use of ActionScript, are there any cases where it's still OK to use very simple AS3 code in the timeline instead of moving code to a class, especially since moving to a class might mean unnecessarily increasing the number of LOC from 4 to 40? (Heck, is the latter case ('instead of ...') even a valid concern at all?)

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• How to get HTTP status code in HTTPService fault handler

  - by Ankur

  I am calling a server method through HTTPService from client side. The server is a RestFul web service and it might respond with one of many HTTP error codes (say, 400 for one error, 404 for another and 409 for yet another). I have been trying to find out the way to determine what was the exact error code sent by the server. I have walked teh entire object tree for the FaultEvent populated in my fault handler, but no where does it tell me the error code. Is this missing functionality in Flex? My code looks like this: The HTTP Service declaration: <mx:HTTPService id="myServerCall" url="myService" method="GET" resultFormat="e4x" result="myServerCallCallBack(event)" fault="faultHandler(event)"> <mx:request> <action>myServerCall</action> <docId>{m_sDocId}</docId> </mx:request> </mx:HTTPService> My fault handler code is like so: private function faultHandler(event : FaultEvent):void { Alert.show(event.statusCode.toString() + " / " + event.fault.message.toString()); }

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• How to improve this piece of code

  - by user303518

  Can anyone help me on this. It may be very frustrating for you all. But I want you guys to take a moment to look at the code below and please tell me all the things that are wrong in the below piece of code. You can copy it into your visual studio to analyze this better. You don’t have to make this code compile. My task is to get the following things: Most obvious mistakes with this code All the things that are wrong/bad practices with the code below Modify/Write an optimized version of this code. Keep in mind, the code DOES NOT need to compile. Reduce the number of lines of code You should NEVER try to implement something like below: public List<ValidationErrorDto> ProcessEQuote(string eQuoteXml, long programUniversalID) { // Get Program Info. DataTable programs = GetAllPrograms(); DataRow[] programRows = programs.Select(string.Format("ProgramUniversalID = {0}", programUniversalID)); long programID = (long)programRows[0]["ProgramID"]; string programName = (string)programRows[0]["Description"]; // Get Config file values. string fromEmail = ConfigurationManager.AppSettings["eQuotesFromEmail"]; string technicalSupportPhone = ConfigurationManager.AppSettings["TechnicalSupportPhone"]; string fromEmailDisplayName = string.IsNullOrEmpty(ConfigurationManager.AppSettings["eQuotesFromDisplayName"]) ? null : string.Format(ConfigurationManager.AppSettings["eQuotesFromDisplayName"], programName); string itEmail = !string.IsNullOrEmpty(ConfigurationManager.AppSettings["ITEmail"]) ? ConfigurationManager.AppSettings["ITEmail"] : string.Empty; string itName = !string.IsNullOrEmpty(ConfigurationManager.AppSettings["ITName"]) ? ConfigurationManager.AppSettings["ITName"] : "IT"; try { List<ValidationErrorDto> allValidationErrors = new List<ValidationErrorDto>(); List<ValidationErrorDto> validationErrors = new List<ValidationErrorDto>(); if (validationErrors.Count == 0) { validationErrors.AddRange(ValidateEQuoteXmlAgainstSchema(eQuoteXml)); if (validationErrors.Count == 0) { XmlDocument eQuoteXmlDoc = new XmlDocument(); eQuoteXmlDoc.LoadXml(eQuoteXml); XmlElement rootElement = eQuoteXmlDoc.DocumentElement; XmlNodeList quotesList = rootElement.SelectNodes("Quote"); foreach (XmlNode node in quotesList) { // Each node should be a quote node but to be safe, check if (node.Name == "Quote") { string groupName = node.SelectSingleNode("Group/GroupName").InnerText; string groupCity = node.SelectSingleNode("Group/GroupCity").InnerText; string groupPostalCode = node.SelectSingleNode("Group/GroupZipCode").InnerText; string groupSicCode = node.SelectSingleNode("Group/GroupSIC").InnerText; string generalAgencyLicenseNumber = node.SelectSingleNode("Group/GALicenseNbr").InnerText; string brokerName = node.SelectSingleNode("Group/BrokerName").InnerText; string deliverToEmailAddress = node.SelectSingleNode("Group/ReturnEmailAddress").InnerText; string brokerEmail = node.SelectSingleNode("Group/BrokerEmail").InnerText; string groupEligibleEmployeeCountString = node.SelectSingleNode("Group/GroupNbrEmployees").InnerText; string quoteEffectiveDateString = node.SelectSingleNode("Group/QuoteEffectiveDate").InnerText; string salesRepName = node.SelectSingleNode("Group/SalesRepName").InnerText; string salesRepPhone = node.SelectSingleNode("Group/SalesRepPhone").InnerText; string salesRepEmail = node.SelectSingleNode("Group/SalesRepEmail").InnerText; string brokerLicenseNumber = node.SelectSingleNode("Group/BrokerLicenseNbr").InnerText; DateTime? quoteEffectiveDate = null; int eligibleEmployeeCount = int.Parse(groupEligibleEmployeeCountString); DateTime quoteEffectiveDateOut; if (!DateTime.TryParse(quoteEffectiveDateString, out quoteEffectiveDateOut)) validationErrors.Add(ValidationHelper.CreateValidationError((long)QuoteField.EffectiveDate, "Quote Effective Date", ValidationErrorDto.ValueOutOfRange, false, ValidationHelper.CreateValidationContext(Entity.QuoteDetail, "Quote"))); else quoteEffectiveDate = quoteEffectiveDateOut; Dictionary<string, string> replacementCodeValues = new Dictionary<string, string>(); if (string.IsNullOrEmpty(Resources.ParameterMessageKeys.ResourceManager.GetString("GroupName"))) throw new InvalidOperationException("GroupName key is not configured"); replacementCodeValues.Add(Resources.ParameterMessageKeys.GroupName, groupName); replacementCodeValues.Add(Resources.ParameterMessageKeys.ProgramName, programName); replacementCodeValues.Add(Resources.ParameterMessageKeys.SalesRepName, salesRepName); replacementCodeValues.Add(Resources.ParameterMessageKeys.SalesRepPhone, salesRepPhone); replacementCodeValues.Add(Resources.ParameterMessageKeys.SalesRepEmail, salesRepEmail); replacementCodeValues.Add(Resources.ParameterMessageKeys.TechnicalSupportPhone, technicalSupportPhone); replacementCodeValues.Add(Resources.ParameterMessageKeys.EligibleEmployeCount, eligibleEmployeeCount.ToString()); // Retrieve the CityID and StateID long? cityID = null; long? stateID = null; DataSet citiesAndStates = Addresses.GetCitiesAndStatesFromPostalCode(groupPostalCode); DataTable cities = citiesAndStates.Tables[0]; DataTable states = citiesAndStates.Tables[1]; DataRow[] cityRows = cities.Select(string.Format("Name = '{0}'", groupCity)); if (cityRows.Length > 0) { cityID = (long)cityRows[0]["CityID"]; DataRow[] stateRows = states.Select(string.Format("CityID = {0}", cityID)); if (stateRows.Length > 0) stateID = (long)stateRows[0]["StateID"]; } // If the StateID does not exist, then we cannot get the GeneralAgency, so set a validation error and do not contine. // Else, Continue and look for an General Agency. If a GA was found, look for or create a Broker. Then look for or create a Prospect Group // Then using the info, create a quote. if (!stateID.HasValue) validationErrors.Add(ValidationHelper.CreateValidationError((long)ProspectGroupField.State, "Prospect Group State", ValidationErrorDto.RequiredFieldMissing, false, ValidationHelper.CreateValidationContext(Entity.ProspectGroup, "Prospect Group"))); bool brokerValidationError = false; SalesRepDto salesRep = GetSalesRepByEmail(salesRepEmail, ref validationErrors); if (salesRep == null) { string exceptionMessage = "Sales Rep Not found in Opportunity System. Please make sure Sales Rep is present in the system by adding the sales rep in AWP SR Add Screen." + Environment.NewLine; exceptionMessage = exceptionMessage + " Sales Rep Name: " + salesRepName + Environment.NewLine; exceptionMessage = exceptionMessage + " Sales Rep Email: " + salesRepEmail + Environment.NewLine; exceptionMessage = exceptionMessage + " Module : E-Quote Service" + Environment.NewLine; throw new Exception(exceptionMessage); } if (validationErrors.Count == 0) { // Note that StateID and EffectiveDate should be valid at this point. If it weren't there would be validation errors. // Find General Agency long? generalAgencyID; validationErrors.AddRange(GetEQuoteGeneralAgency(generalAgencyLicenseNumber, stateID.Value, out generalAgencyID)); // If GA was found, check for Broker. if (validationErrors.Count == 0 && generalAgencyID.HasValue) { Dictionary<string, string> brokerNameParts = ContactHelper.GetNamePartsFromFullName(brokerName); long? brokerID; validationErrors.AddRange(CreateEQuoteBroker(brokerNameParts["FirstName"], brokerNameParts["LastName"], brokerEmail, brokerLicenseNumber, stateID.Value, generalAgencyID.Value, salesRep, programID, out brokerID)); // If Broker was found but had validation errors if (validationErrors.Count > 0) { DeliverEmailMessage(programID, quoteEffectiveDate.Value, fromEmail, fromEmailDisplayName, itEmail, DocumentType.EQuoteBrokerValidationFailureMessageEmail, replacementCodeValues); brokerValidationError = true; } // If Broker was found, check for Prospect Group if (validationErrors.Count == 0 && brokerID.HasValue) { long? prospectGroupID; validationErrors.AddRange(CreateEQuoteProspectGroup(groupName, cityID, stateID, groupPostalCode, groupSicCode, brokerID.Value, out prospectGroupID)); if (validationErrors.Count == 0 && prospectGroupID.HasValue) { if (validationErrors.Count == 0) { long? quoteID; validationErrors.AddRange(CreateEQuote(programID, prospectGroupID.Value, generalAgencyID.Value, quoteEffectiveDate.Value, eligibleEmployeeCount, deliverToEmailAddress, node.SelectNodes("Employees/Employee"), deliverToEmailAddress, out quoteID)); if (validationErrors.Count == 0 && quoteID.HasValue) { QuoteFromServiceDto quoteFromService = GetQuoteByQuoteID(quoteID.Value); // Generate Pre-Message replacementCodeValues.Add(Resources.ParameterMessageKeys.QuoteNumber, string.Format("{0}.{1}", quoteFromService.QuoteNumber, quoteFromService.QuoteVersion)); replacementCodeValues.Add(Resources.ParameterMessageKeys.Name, brokerName); replacementCodeValues.Add(Resources.ParameterMessageKeys.LicenseNumbers, brokerLicenseNumber); DeliverEmailMessage(programID, quoteEffectiveDate.Value, fromEmail, fromEmailDisplayName, deliverToEmailAddress, DocumentType.EQuotePreMessageEmail, replacementCodeValues); bool quoteGenerated = false; try { quoteGenerated = GenerateAndDeliverInitialQuote(quoteID.Value); } catch (Exception exception) { TraceLogger.LogException(exception, LoggingCategory); if (replacementCodeValues.ContainsKey(Resources.ParameterMessageKeys.Name)) replacementCodeValues[Resources.ParameterMessageKeys.Name] = itName; else replacementCodeValues.Add(Resources.ParameterMessageKeys.Name, itName); if (replacementCodeValues.ContainsKey(Resources.ParameterMessageKeys.Errors)) replacementCodeValues[Resources.ParameterMessageKeys.Errors] = string.Format("Errors:\r\n:{0}", exception); else replacementCodeValues.Add(Resources.ParameterMessageKeys.Errors, string.Format("Errors:\r\n:{0}", exception)); DeliverEmailMessage(programID, quoteEffectiveDate.Value, fromEmail, fromEmailDisplayName, itEmail, DocumentType.EQuoteSystemFailureMessageEmail, replacementCodeValues); } if (!quoteGenerated) { // Generate System Failure Message if (replacementCodeValues.ContainsKey(Resources.ParameterMessageKeys.Name)) replacementCodeValues[Resources.ParameterMessageKeys.Name] = brokerName; else replacementCodeValues.Add(Resources.ParameterMessageKeys.Name, brokerName); if (replacementCodeValues.ContainsKey(Resources.ParameterMessageKeys.Errors)) replacementCodeValues[Resources.ParameterMessageKeys.Errors] = string.Empty; else replacementCodeValues.Add(Resources.ParameterMessageKeys.Errors, string.Empty); DeliverEmailMessage(programID, quoteEffectiveDate.Value, fromEmail, fromEmailDisplayName, itEmail, DocumentType.EQuoteSystemFailureMessageEmail, replacementCodeValues); } } } } } } } //if (validationErrors.Count > 0) // Per spec, if Broker Validation returned an error we already sent an email, don't send another generic one if (validationErrors.Count > 0 && (!brokerValidationError)) { StringBuilder errorString = new StringBuilder(); foreach (ValidationErrorDto validationError in validationErrors) errorString = errorString.AppendLine(string.Format(" - {0}", ValidationHelper.GetValidationErrorReason(validationError, true))); replacementCodeValues.Add(Resources.ParameterMessageKeys.Errors, errorString.ToString()); if (replacementCodeValues.ContainsKey(Resources.ParameterMessageKeys.Name)) replacementCodeValues[Resources.ParameterMessageKeys.Name] = brokerName; else replacementCodeValues.Add(Resources.ParameterMessageKeys.Name, brokerName); // HACK: If there is no effective date, then use Today's date. Do we care about the effecitve dat on validation message? if (quoteEffectiveDate.HasValue) DeliverEmailMessage(programID, quoteEffectiveDate.Value, fromEmail, fromEmailDisplayName, itEmail, DocumentType.EQuoteValidationFailureMessageEmail, replacementCodeValues); else DeliverEmailMessage(programID, DateTime.Now, fromEmail, fromEmailDisplayName, itEmail, DocumentType.EQuoteValidationFailureMessageEmail, replacementCodeValues); } allValidationErrors.AddRange(validationErrors); validationErrors.Clear(); } } } else { // Use todays date as the effective date. Dictionary<string, string> replacementCodeValues = new Dictionary<string, string>(); StringBuilder errorString = new StringBuilder(); foreach (ValidationErrorDto validationError in validationErrors) errorString = errorString.AppendLine(string.Format(" - {0}", ValidationHelper.GetValidationErrorReason(validationError, true))); replacementCodeValues.Add(Resources.ParameterMessageKeys.Errors, string.Format("The following validation errors occurred: \r\n{0}", errorString)); replacementCodeValues.Add(Resources.ParameterMessageKeys.ProgramName, programName); replacementCodeValues.Add(Resources.ParameterMessageKeys.GroupName, "Group"); replacementCodeValues.Add(Resources.ParameterMessageKeys.Name, itName); DeliverEmailMessage(programID, DateTime.Now, fromEmail, null, itEmail, DocumentType.EQuoteSystemFailureMessageEmail, replacementCodeValues); allValidationErrors.AddRange(validationErrors); validationErrors.Clear(); } } return allValidationErrors; } catch (Exception exception) { TraceLogger.LogException(exception, LoggingCategory); // Use todays date as the effective date. Dictionary<string, string> replacementCodeValues = new Dictionary<string, string>(); replacementCodeValues.Add(Resources.ParameterMessageKeys.ProgramName, programName); replacementCodeValues.Add(Resources.ParameterMessageKeys.GroupName, "Group"); replacementCodeValues.Add(Resources.ParameterMessageKeys.Name, itName); replacementCodeValues.Add(Resources.ParameterMessageKeys.Errors, string.Format("Errors:\r\n:{0}", exception)); DeliverEmailMessage(programID, DateTime.Now, fromEmail, null, itEmail, DocumentType.EQuoteSystemFailureMessageEmail, replacementCodeValues); throw new FaultException(exception.ToString()); } }

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• Why is there unreachable code here?

  - by Richard

  I am writing a c# app and want to output error messages to either the console or a messagebox (Depending on the app type: enum AppTypeChoice { Console, Windows } ), and also control wether the app keeps running or not ( bool StopOnError ). I came up with this method that will check all the criteria, but I'm getting an "unreachable code detected" warning. I can't see why! Here is the whole method (Brace yourselves for some hobbyist code!) public void OutputError(string message) { string standardMessage = "Something went WRONG!. [ But I'm not telling you what! ]"; string defaultMsgBoxTitle = "Aaaaarrrggggggggggg!!!!!"; string dosBoxOutput = "\n\n*** " + defaultMsgBoxTitle + " *** \n\n Message was: '" + message + "'\n\n"; AppTypeChoice appType = DataDefs.AppType; DebugLevelChoice level = DataDefs.DebugLevel; // Decide how much info we should give out here... if (level != DebugLevelChoice.None) { // Give some info.... if (appType == AppTypeChoice.Windows) MessageBox.Show(message, defaultMsgBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Error); else Console.WriteLine(dosBoxOutput); } else { // Be very secretive... if (appType == AppTypeChoice.Windows) MessageBox.Show(standardMessage, defaultMsgBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Error); else Console.WriteLine(standardMessage); } // Decide if app falls over or not.. if (DataDefs.StopOnError == true) Environment.Exit(0); // UNREACHABLE CODE HERE } Also, while I have your attention, to get the app type, I'm just using a constant at the top of the file (ie. AppTypeChoice.Console in a Console app etc) - is there a better way of doing this (i mean finding out in code if it is a DOS or Windows app)? Also, I noticed that I can use a messagebox with a fully-qualified path in a Console app...How bad is is to do that ( I mean, will I get tarred and feathered when other developers see it?!) Thanks for your help

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