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  • try catch finally

    - by gligom
    Maby this is simple for you, but for me is not. I have this code: Private int InsertData() { int rezultat = 0; try { if (sqlconn.State != ConnectionState.Open) { sqlconn.Open(); } rezultat = (int)cmd.ExecuteScalar(); } catch (Exception ex) { lblMesaje.Text = "Eroare: " + ex.Message.ToString(); } finally { if (sqlconn.State != ConnectionState.Closed) { sqlconn.Close(); } } return rezultat; } Is just for inserting a new record in a table. Even if this throw an error "Specified cast is not valid." "rezultat=(int)cmd.ExecuteScalar();" - the code is executed and the row is inserted in the database, and the execution continues. Why it continues? Maby i don't understand the try catch finally yet Smile | :) Thank you!

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  • "Attach to process" missing from Delphi 7's Run menu

    - by glob
    I have to resurrect an ancient Delphi 7 application, which means I have to use the D7 IDE. Upgrading the project to a more recent version of Delphi unfortunately isn't an option. My new D7 installation's Run menu is missing Attach to Process. Aside from the missing menu item, the debugger works fine (I can debug normal Delphi executables started with Run). I know D7 supported this feature (it's in the help file), so does anyone have any idea what I've missed? The installation is Delphi 7 Enterprise (Version 7.0 Build 4.453). Current Run menuitems: Run Parameters... - Step Over Trace Into Trace to next Source line Run to Cursor Run Until Return Show Execution Point Program Pause Program Reset - Evaluate/Modify Add Watch Add Breakpoint

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  • Visual Studio debugger problem

    - by Alexandre Pepin
    In Visual Studio 2008, after debugging about 1-2 minutes, when I press F10 (Step Over), the debugger hangs and Visual Studio freezes for 5-10 seconds and then go to the next line. Then whatever I do (F10, F5, F11, etc), the debugger continues the execution as if i pressed F5 and all my forms that I was debugging close. I always have to restart the application. It is very hard to reproduce and it does not occurs every time I want to debug something. Does anyone has a solution ?

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  • How to optimize this code

    - by phenevo
    Hi I class Car it has a property: string Code and 10 other. common codes is list of strings(string[] ) cars a list of cars(Car[]) filteredListOfCars is List. for (int index = 0; index < cars.Length; index++) { Car car = cars[index]; if (commonCodes.Contains(car.Code)) { filteredListOfCars.Add(car); } } Unfortunately this piece of methodexecutes too long. I have about 50k records How can I lower execution time??

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  • T-SQL: How Do I Create A "Private" Function Inside A Stored Procedure

    - by RPM1984
    Okay so im writing a SQL Server 2008 Stored Procedure (maintenance script). In doing so, being a good boy i've done plenty of error handling, checking rowcounts, printing output messages, etc But in doing this, ive found myself writing over and over again something like this: SELECT @RowsAffected = @@ROWCOUNT IF @RowsAffected > 0 BEGIN PRINT CAST(@RowsAffected, NVARCHAR(2)) + 'rows updated.' END Or debug messages like this: PRINT 'User ' + CAST(@UserId AS NVARCHAR(5)) + ' modified successfully' Is there a way i can create a kind of 'subroutine' inside the stored procedure (like a private method) that can accept something as a parameter (doesnt have to though) and do some logic? I want to be able to do something like this: CheckRowCounts Or this: PrintUserUpatedMessage(@UserId) Which would then perform the above logic (check rowcount, print message, etc) And yes obviously i can create a UDF, but then i would need to create/drop it etc as this logic is only required for the life of the execution of this stored procedure. Getting sick and tired of writing the same code over and over again, and changing all the different areas ive used it when i get an error =) Can anyone help?

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  • can't create socket using IO::Socket

    - by Haiyuan Zhang
    when I run the following code, the execution is just hanging there, No response at all. does any of you can tell me what's wrong with the sample code? use strict; use warnings; use IO::Select; use IO::Socket; my $s = new IO::Socket ( LocalPort => 8889, Proto => 'tcp', Listen => 16, Reuse => 1 ); die "could not create socket $!\n" unless $s;

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  • Setting a breakpoint in a T4 template

    - by Dave Swersky
    I'm trying to debug the execution of a T4 template in Visual Studio 2008. All the information I'm finding on debugging T4 templates in Visual Studio 2008 say that you can set a breakpoint (red dot) in the template as if it were a regular code file. I have the Clarius T4 code highlighter installed, so my T4 template is colored, but I can't set a breakpoint. When I click in the margin nothing happens. I've tried Debugger.Break(), and it launches a new instance of VS.NET, but it can't load the code from my template. I get a dialog that says "There is no source code available for the current location." This happens if I have the same project loaded in the another instance of if I spin up a new instance. What gives?

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  • Do I need to Dispose to deregister events?

    - by Sean
    Say I have two classes, and neither of them are GUI components. Class A is a short lived object that registers for an event declared by a long lived object B. For example public A(B b) { b.ChangeEvent += OnChangeEvent; } If A never deregisters from B's event, will A never be garbage collected? Does A need a Dispose method just to deregister from B's event? There is also a related second question. If A and B should both live for the entire execution time of the application, does A need to deregister?

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  • [C++]Advantage of using a static member function instead of an equivalent non-static member function

    - by jonathanasdf
    I was wondering whether there's any advantages to using a static member function when there is a non-static equivalent. Will it result in faster execution (because of not having to care about all of the member variables), or maybe less use of memory (because of not being included in all instances)? Basically, the function I'm looking at is an utility function to rotate an integer array representing pixel colours an arbitrary number of degrees around an arbitrary centre point. It is placed in my abstract Bullet base class, since only the bullets will be using it and I didn't want the overhead of calling it in some utility class. It's a bit too long and used in every single derived bullet class, making it probably not a good idea to inline. How would you suggest I define this function? As a static member function of Bullet, of a non-static member function of Bullet, or maybe not as a member of Bullet but defined outside of the class in Bullet.h? What are the advantages and disadvantages of each?

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  • Why should i use EJB?

    - by Nitesh Panchal
    Hello, As we all know that EJB's in 3.1 or 3.0 are simple POJOs. You just need to give annotations here and there and it gets converted to EJB from simple class. So, now my question is why should i use EJBs at all? Can i not do without them? In .Net i created class library and got things done. I never felt the need for anything like EJB. Simple classes were enough. Then, why in Java people stress on EJB? What is difference between a simple POJO and EJB in terms of execution and memory? Further which function should i write in EJB and which should i write in simple class? Should i dump every function in EJB only? or there is some kind of strategy? Does EJB provide anything special?

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  • Determing Python version at runtime

    - by Gekitsuu
    The problem I'm having is that I've written code that depends on features in python2.6 so I'm trying to build a check that will produce a useful error if someone tries to run it on a machine with python lower than 2.6. The code I put in to check for the specific version and match it should work fine but the problem I have is the interpreter on a 2.4 machine reads the file and sees a "finally" at the end of my try loop and errors out before it gets far enough into execution for my if statement to handle the version mismatch. Other than changing the magic line to specifically look for /usr/bin/python2.6 is there a way python can handle this sort of thing?

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  • Passing user context to from impersonated thread to outproc COM object

    - by Thumbeti
    Hi, I am writing a CPP program on windows 2k3 where i want to achieve the following thing. Pass the user context from the impersonated thread to a outproc COM component. Steps what i m trying in details are: 1) Start an execution of exe with user USR1 2) Impersonate the current thread with USR2 3) Initiate a API on outproc COM object. And this COM object should run with USR2 What is happening: on 3rd step, COM object is getting started with USR1 only. Can anybody help me in passing the user context to COM object. Thanks in advance, Thumbeti

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  • Getting past Salesforce trigger governors

    - by Jake
    I'm trying to write an "after update" trigger that does a batch update on all child records of the record that has just been updated. This needs to be able to handle 15k+ child records at a time. Unfortunately, the limit appears to be 100, which is so far below my needs it's not even close to acceptable. I haven't tried splitting the records into batches of 100 each, since this will still put me at a cap of 10k updates per trigger execution. (Maybe I could just daisy-chain triggers together? ugh.) Does anyone know what series of hoops I can jump through to overcome yet another ridiculously short-sighted limitation by this awful development "platform"?

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  • Select a certain amount of checkbox arrays on the page

    - by Joris Tobebech
    Hi guys, so i wrote a function to select a certain amount of checkboxes on the page, the number retrieves fine when i message box it but no checkboxes are checked. here is my function function checkAmount(number) { alert(number); var boxes = document.getElementsByTagName("input"); for (var i = 0; i < number; i++) { if (boxes[i].name == "vote[]") { boxes[i].checked = true; } } } and here is my execution code OnClick="checkAmount(document.getElementById(\'ammount\').value)"

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  • Automatic exit from bash shell script on error

    - by radman
    Hi, I've been writing some shell script and I would find it useful if there was the ability to halt the execution of said shell script if any of the commands failed. See below for an example: #!/bin/bash cd some_dir ./configure --some-flags make make install So in this case if the script can't change to the indicated directory then it would certainly not want to do a ./configure afterward it fails. Now I'm well aware that I could have an if check for each command (which I think is a hopeless solution), but is there a global setting to make the script exit if one of the commands fails?

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  • SQLBulkCopy used in conjunction with Transaction and firing an event each time a batch is copied

    - by Hans Rudel
    Im currently uploading data to MS SQL server via SQLBulkCopy and Transactions. I would like to be able to raise an event after each batch has been uploaded (I have already tried SQLRowsCopied event and it doesnt work, see quote below) MSDN quote: No action, such as transaction activity, is supported in the connection during the execution of the bulk copy operation, and it is recommended that you not use the same connection used during the SqlRowsCopied event. However, you can open a different connection. http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlbulkcopy.sqlrowscopied(v=vs.80).aspx So i basically cant have my cake and eat it :( Does anyone know a solution around this as i would like to fire an event after each batch has been uploaded. Thanks for your help.

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  • Logs overwritten in CruiseCControl.NET when there is multiple MSBuild Tasks.

    - by James Poulose
    I have two MSBuild tasks in my CC.NET config. In the end of the execution, i can see two blocks of warnings/errors in the log and published email. But the problem is that the contents of both the blocks are the same and that is from the second MSBuild task!! In another way, the second MSBuild task overwrites the first log, and then creates another one for itself effectively creating two exactly identical block!!! Do anybody have any thoughts on this? I am happy to provide more information if you require about the environment and configuration. Thanks, James Poulose

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  • Socket ping-pong performance

    - by Kamil_H
    I have written two simple programs (tried it in C++ and C#). This is pseudo code: -------- Client --------------- for(int i = 0; i < 200.000; i++) { socket_send("ping") socket_receive(buff) } --------- Server ------------- while(1) { socket_receive(buff) socket_send("pong") } I tried it on Windows. Execution time of client is about 45 seconds. Can somebody explain me why this takes so long? I understand that if there were real network connection between client and server the time of one 'ping-pong' would be: generate_ping + send_via_network + generate_pong + send_via_network but here everything is done in 'local' mode. Is there any way to make this inter process ping-pong faster using network sockets (I'm not asking about shared memory for example :) )

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  • Access violation exception from Delphi's Supports -> QueryInterface

    - by Sharon
    Hi, I have the following piece of code: for i := 0 to FControlList.Count - 1 do if Supports(IMyControl(FControlList[i]), IMyControlEx) then begin MyControlEx := IMyControl(FControlList[i]) as IMyControlEx; MyControlEx.DoYourMagic(Self, SomeData); end; This code is called many times during my application execution, but in some specific cases it fails inside the Supports() method. And more specifically - it seems to fall inside the QueryInterface() call within the Supports() method. I checked that FControlList is not nil and FControlList[i] is not nil and it still happens. Any idea will be appreciated!!!

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  • Debugging ASP.NET on a built-in web server suddenly stops

    - by Anton Gogolev
    I have Windows Server 2008 (64-bit), VS 2008 with its built-in webserver and an ASP.NET MVC 1.0 webapp. All I'm trying to do is to debug said app. I have a bunch of breakpoints, but they behave in a very strange way. When I fist start a debugging session with F5 and hit a breakpoint, the debugger stops just fine. However, after serveral F10s/F11s debugging suddenly "stops" (no exceptions at that time), but neither VS detaches from browsers' process, nor webapp execution stops: Visual Studio stays attached, and web request continues executing as usual. I tried various browsers (Chrome, Firefox, IE), but to no avail. What do I do to solve this? It really drives me insane.

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  • Are Scala "continuations" just a funky syntax for defining and using Callback Functions?

    - by Alex R
    And I mean that in the same sense that a C/Java for is just a funky syntax for a while loop. I still remember when first learning about the for loop in C, the mental effort that had to go into understanding the execution sequence of the three control expressions relative to the loop statement. Seems to me the same sort of effort has to be applied to understand Continuations (in Scala and I guess probably other languages). And then there's the obvious follow-up question... if so, then what's the point? It seems like a lot of pain (language complexity, programmer errors, unreadable programs, etc) for no gain.

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  • Can anyone telme whats wrong in this part of code

    - by Mobin
    string name = ((DateTimePicker)sender).Name.ToString(); name = name.Substring(0, name.Length - 1); name = name + "4"; TimeSpan duration = new TimeSpan(); duration = ((DateTimePicker)sender).Value - ((DateTimePicker)panel2.Controls[name]).Value; name = name.Substring(0, name.Length - 1); name = name + "6"; ((MaskedTextBox)panel2.Controls[name]).Text = duration.ToString(); on execution it gives me Object reference not set to instance of an object similar functionality is used on other places but can't find out what i have to reinitialize here :$

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  • What's the best way to measure and track performance over various calls at runtime?

    - by bitcruncher
    Hello. I'm trying to optimize the performance of my code, but I'm not familiar with xcode's debuggers or debuggers in general. Is it possible to track the execution time and frequency of calls being made at runtime? Imagine a chain of events with some recursive calls over a fraction of a second. What's the best way to track where the CPU spends most of its time? Many thanks. Edit: Maybe this is better asked by saying, how do I use the xcode debug tools to do a stack trace?

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  • How to implement arrays in an interpreter?

    - by Ray
    I have managed to write several interpreters including Tokenizing Parsing, including more complicated expressions such as ((x+y)*z)/2 Building bytecode from syntax trees Actual bytecode execution What I didn't manage: Implementation of dictionaries/lists/arrays. I always got stuck with getting multiple values into one variable. My value structure (used for all values passed around, including variables) looks like this, for example: class Value { public: ValueType type; int integerValue; string stringValue; } Works fine with integers and strings, but how could I implement arrays? (From now on with array I mean arrays in my experimental language, not in C++) How can I fit the array concept into the Value class above? Is it possible? How should I make arrays able to be passed around just as you could pass around integers and strings in my language, using the class above? Accessing array elements or memory allocation wouldn't be the problem, I just don't know how to store them.

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  • Returning IEnumerable<T> vs IQueryable<T>

    - by stackoverflowuser
    what is the difference between returning iqueryable vs ienumerable. IQueryable<Customer> custs = from c in db.Customers where c.City == "<City>" select c; IEnumerable<Customer> custs = from c in db.Customers where c.City == "<City>" select c; Will both be deferred execution? When should one be preferred over the other?

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