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• sql: DELETE + INSERT vs UPDATE + INSERT

  - by user93422

  A similar question has been asked, but since it always depends, I'm asking for my specific situation separately. I have a web-site page that shows some data that comes from a database, and to generate the data from that database I have to do some fairly complex multiple joins queries. The data is being updated once a day (nightly). I would like to pre-generate the data for the said view to speed up the page access. For that I am creating a table that contains exact data I need. Question: for my situation, is it reasonable to do complete table wipe followed by insert? or should I do update,insert? SQL wise seems like DELETE + INSERT will be easier (it is single SQL expression). EDIT: RDBMS: MS SQL Server 2008 Ent

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• How to add an existing folder to a Visual Studio project?

  - by Earlz

  I have a web application project made in Visual Studio 2008. Well, I added a jquery folder and added it to source control and other such things. I forgot to add it to the visual studio project though. How do I add the existing folder now? I've tried just creating a new folder and naming it jquery but it gave me a cryptic error "the directory is already on the disk ... if you want to see this directory then check the Show All Files option in the project file" Yet I looked and saw no such option. Is the only way around this to rename jquery to jquery2 and then create a new folder via visual studio named jquery and copy all my files into it?

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• std::make_shared as a default argument does not compile

  - by Mark Bryant

  In Visual C++ (2008 and 2010), the following code does not compile with the following error: #include <memory> void Foo( std::shared_ptr< int > test = ::std::make_shared< int >( 5 ) ) { } class P { void Foo( std::shared_ptr< int > test = ::std::make_shared< int >( 5 ) ) { } }; error C2039: 'make_shared' : is not a member of '`global namespace'' error C3861: 'make_shared': identifier not found It is complaining about the definition of P::Foo() not ::Foo(). Does anybody know why it is valid for Foo() to have a default argument with std::make_shared but not P::Foo()?

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• How to build a Main Menu screen

  - by flow overstack

  Good day (and happy New Year), I'm a beginner VB.Net programmer using VS 2008. I'm planning a new winform project whose main form should look more or less like this: MAIN MENU 1. DoSomething1 2. DoSomething2 3. DoSomething3 ... Please choose: [TextBox] The user can either choose from the Main Menu (by clicking an item) or enter the item number in the textbox. For example, if the user clicks DoSomething3 in the Main Menu (or alternatively enters 3 in the textbox), another form will be opened and hide the main form. What would be the best way to implement it? Specifically, I would like to know how I make so that choosing from the menu and entering a number in the textbox fire the same event. Any help or hints will be appreciated.

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• Copy method optimization in compilers

  - by Dženan

  Hi All! I have the following code: void Stack::operator =(Stack &rhs) { //do the actual copying } Stack::Stack(Stack &rhs) //copy-constructor { top=NULL; //initialize this as an empty stack (which it is) *this=rhs; //invoke assignment operator } Stack& Stack::CopyStack() { return *this; //this statement will invoke copy contructor } It is being used like this: unsigned Stack::count() { unsigned c=0; Stack copy=CopyStack(); while (!copy.empty()) { copy.pop(); c++; } return c; } Removing reference symbol from declaration of CopyStack (returning a copy instead of reference) makes no difference in visual studio 2008 (with respect to number of times copying is invoked). I guess it gets optimized away - normally it should first make a copy for the return value, then call assignment operator once more to assign it to variable sc. What is your experience with this sort of optimization in different compilers? Regards, Dženan

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• WPF Books in 2010

  - by notJim

  I'm looking to learn WPF, and I'd like to get a book to help in the process. Most of the popular questions on SO regarding actual books are from 2008, and I wanted to see if recommendations for books had changed at all. WPF Unleashed, which seems to be the most popular recommendation, was published in 2006, which is quite a while ago, with the lightening-quick pace that Microsoft has been following with .NET. Does this book still work? For some background, I'm a web developer (using MVC, so MVVM makes sense to me conceptually), looking to make the jump to desktop development. I did C# a while ago, but I'll be picking up a separate C# book to get up to speed on that. I am not interested in Silverlight. I am not necessarily interested in flashy UIs right now, as I'm working on business software but what I am interested in is good, clean, intuitive user interfaces.

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• Javascript: Display message when user leaves site

  - by Brian Rasmusson

  Hi, I'm looking for a way to display a message to the user if he leaves my site after only viewing one page. I found this (http://www.pgrs.net/2008/1/30/popup-when-leaving-website) clever solution, but it has a few flaws: staying_in_site = false; Event.observe(document.body, 'click', function(event) { if (Event.element(event).tagName == 'A') { staying_in_site = true; } }); window.onunload = popup; function popup() { if(staying_in_site) { return; } alert('I see you are leaving the site'); } It displays the message also when refreshing the page or using the back button. Do you know a better solution or how to fix it in the above code? I'm no javascript master :) My intention is to add the code on very specific landing pages only, and display the message when people leave the page without downloading my trial software or reading other pages on my site.

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• Code corresponding to leaks with Visual Leak Detector

  - by matt

  I am trying to use Visual Leak Detector in Visual Studio 2008, here is an example of the output I get: Detected memory leaks! Dumping objects -> {204} normal block at 0x036C1568, 1920 bytes long. Data: < > 80 08 AB 03 00 01 AB 03 80 F9 AA 03 00 F2 AA 03 {203} normal block at 0x0372CC68, 40 bytes long. Data: <( > 28 00 00 00 80 02 00 00 E0 01 00 00 01 00 18 00 {202} normal block at 0x0372CC00, 44 bytes long. Data: << E > 3C 16 45 00 80 02 00 00 E0 01 00 00 01 00 00 00 The user's guide says to click on any line to jump to the corresponding file/line of code ; I tried clicking on every line but nothing happens! What am I missing?

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• Talking to a server in Win32; how do I see the server's response?

  - by Vinod K

  I am new to Win32 programming. sprintf(lpszBuff,"HELO Mail-Server\r\n"); send(s,lpszBuff,strlen(lpszBuff),0); recv(s,lpszBuff,100,0); cout << lpszBuff; In here I connect to a local mail server. The buffer contains the request I send, the same buffer contains the reply send by the browser. How do I see the reply? cout <<buffer doesn't show any output. I am doing this on VC++ 2008.

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• Grid computing projects similar to NGrid (thread based)

  - by DivdeAndConquer

  Hello there, first time poster. This is a great place for reading about programming problems. I've been looking at some grid computing projects for .Net/Mono and stumbled upon NGrid. NGrid seems really appealing for grid computing because you simply pass threads to it and there is very little modification you have to make to your code. However, I see that NGrid (http://ngrid.sourceforge.net/?page=overview) is still at version 0.7 and hasn't been updated since May 2008. So, I'm wondering if there are any other grid computing projects that use a similar thread-passing architecture and if anyone has had success using NGrid.

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• How to compile using gcc but without using _alloca ?

  - by shkim

  For some reason, I should use gcc to compile a C file, then link against Visual C++ 2008 project. (I used the current latest gcc version: cygwin gcc 4.3.4 20090804.) But there is one problem: gcc always allocate a big array with _alloca, and VC linker can't resolve the symbol __alloca. for example, int func() { int big[10240]; .... } this code makes the _alloca dependency although I didn't call the _alloca function explicitly. (array size matters. if i change 10240 - 128, everything ok) I tried gcc option -fno-builtin-alloca or -fno-builtin, but no luck. Is it possible to make gcc not to use _alloca ? (or adjust the threshold?)

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• Need CSS Help with a hover element - cant extend to left and right of page

  - by Bobafett

  Hi there, Need some CSS guru help. If you visit my link: http://www.gabbr.com/js/viewer/cmedata/index1.html and hover over the years (top middles, 2008, 2009, 2010, etc) you will notice an orange bar extending from the top to the bottom of the page. I am trying to get the same effect on the left (month and day) but am unable to do so. The problem I am having is that I cannot get the orange hover bar to extend off the left of the screen for either #dayleft or for #monthleft. It extends all the way to the right margin of the screen but not the left. The problem is the margin-left: 15px; in #monthleft and margin-left: 80px; in #dayleft. But I cannot get rid of these since I require them for the letter spacing. Any advice?

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• C# -Mono (platform independence)

  - by Andy

  I'm very newbie to Ubuntu OS and I have my solution developed in visual studio 2008. I want my application to run in both windows and Linux(ubuntu). I've few questions in my mind. 1)Does mono support visual debugger . 2)If I start development using mono.Is it possible to run same in .net framework (windows) ?? or do I need to write the NSI script to download the libraries during installation from internet and install. 3)what is the best way to achieve platform independence. Thanks in advance.

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• Undocumented overload of string.Split() ?

  - by Neil N

  According to both Intellisense and MSDN doc on string.Split, there are no parameterless overloads of string.Split. Yet if I type in string[] foo = bar.Split(); It compiles. And it works. I have verified this in both Visual Studio 2008 and 2010. In both cases intellisense does not show the parameterless overload. Is there a reason for this? Are there any other missing overloads from the MSDN/Intellisense docs? Usually browsing through overloads in intellisense is how I best determine which overload to use. I'd hate to think I am missing other available options throughout the .Net framework.

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• How do I get MSBuild Task to generate XML Documents when building a solution?

  - by toba303

  I have a solution with lots of projects. Each project is configured to generate the XML documentation file when building in Debug-Mode (which is default). That works when I build in Visual Studio 2008. In my build script on my integration server I advise MSBuild to build the whole solution, but it won't generate the documentation files. What can I do? I already tried to explicitly give the Debug-Condition to the build process, but it makes no difference. <Target Name="BuilSolution"> <MSBuild Projects="C:\Path\To\MySolution.sln" targets="Build" Properties="SolutionConfigurationPlatforms='Debug|Any CPU'"/> </Target> There seem to be some ideas to solve this problem when building single projects, but I can't afford to do this, so I need a hint for doing it this way. Thanks in advance!

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• How can I implement a login wall for expired or inappropriate pages?

  - by Redandwhite

  I am writing a website that very explicitly requires a login wall. Visitors should be required to log in before they are allowed to view a page. The page being built depends very much on the user's "ID". I am not sure how or where to store the user's login. I am not sure whether I should use a session variable (e.g. Session["userId"]), or some other method. The problem I see with session variables is that it's difficult to time out sessions. Note: I'm using C# 3.5 with ASP.NET in Visual Studio 2008.

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• Compiler error while compiling the RAPID library on VS2008

  - by Demi

  I've downloaded the RAPID library and tried to compile it on Microsoft Visual Studio 2008. However, I'm getting the following compiler error: C4430 missing type specifier - int assumed. Note: C++ does not support default-int at this code segment (the exact line that produces the error is int flag): class RAPID_model { public: box *b; int num_boxes_alloced; tri *tris; int num_tris; int num_tris_alloced; int build_state; int build_hierarchy(); friend RAPID_Collide(double R1[3][3], double T1[3], double s1, RAPID_model *RAPID_model1, double R2[3][3], double T2[3], double s2, RAPID_model *RAPID_model2, int flag); Can anyone please help me with this? Thank you

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• null reference exception was unhandled by user code

  - by user238319

  sir, i develop the following code in vs2005, now i just using this module in my new project @ vs 2008.. But this error was araised. I cant able to fix this problem... Private Sub DataAccess() Dim errHandle As New ErrorHandler Dim lobjCommon As New eCopsCommonFunctions Try AccessCodeDrplst.DataSource = CType(lobjCommon.gfuncGetAllEnrollmentSource(), DataSet) AccessCodeDrplst.DataValueField = "DataAccessCode" AccessCodeDrplst.DataTextField = "DataAccessDesc" AccessCodeDrplst.DataBind() 'lstEnrollmentSourceCode.DataValueField = "EnrollmentSourceCode" 'lstEnrollmentSourceCode.DataTextField = "EnrollmentSourceDesc" 'lstEnrollmentSourceCode.DataBind() '"Beneficiary Election" is pre selected as default value. By pals on Oct 24th 2007 'lstEnrollmentSourceCode.SelectedValue = "B" 'lstEnrollmentSourceCode.Items.Insert(0, New ListItem("Select", "0")) Catch ex As Exception errHandle.gProcHandleErrors(ex, Session("MemberID"), "SPStatus.aspx.vb, gprocFillSEPCode") Throw ex Finally lobjCommon = Nothing ///here the error occurs as 'NullException was unhandle by the user code' errHandle = Nothing End Try End Sub

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• Conditional PIVOT/transform problem

  - by IanC

  Hi folks I have a table with three columns, which we'll call ID1, ID2, and Value. Sample data: ID ID1 Value 1 1 0 1 2 1 1 3 1 1 3 2 1 4 0 1 4 1 1 5 0 1 5 2 2 1 2 Value is limited to 0, 1, or 2. What I need to do is pivot/transform this data into a column-based count of how many times each possible Value appears, grouped by ID, ID1. The output of the above should be: ID ID1 Val0 Val1 Val2 1 1 1 0 0 1 2 0 2 0 1 3 0 1 1 1 4 1 1 0 1 5 1 0 1 2 1 0 0 1 I'm using SQL Server 2008. How do I do this?

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• Understanding configuration for parallel calling in web app (IIS + MS SQL)

  - by mmcteam.com.ua

  We have an ASP.NET MVC application + IIS 7.5 + SQL Server 2008 R2. We have to load a lot of aggregate counters on the each page. We decided to use ajax and call with javascript for each counter or groups of counters and return them as JSON result. We solve the problem that user doesn't wait for page loading, page loads fast. User waits for counters loading while seeing other page content. But we thought that if we make calls from javascript - our queries will be make async, but we notice, that it is not. All our javascipt calls runs immediately, but action that they invoke are in queue. If we use Async Controller ability - all counters calculating simultaneously, but user has to wait for the longest counter calculating before page loads. The question: We want to understand what is happens if we use ajax and call two or more actions simultaneously. And how can we configuring this. (also in each action we make some queries to sql server)

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• How do I make use of multiple cores in Large SQL Server Queries?

  - by Jonathan Beerhalter

  I have two SQL Servers, one for production, and one as an archive. Every night, we've got a SQL job that runs and copies the days production data over to the archive. As we've grown, this process takes longer and longer and longer. When I watch the utilization on the archive server running the archival process, I see that it only ever makes use of a single core. And since this box has eight cores, this is a huge waste of resources. The job runs at 3AM, so it's free to take any and all resources it can find. So what I need to do if figure out how to structure SQL Server jobs so they can take advantage of multiple cores, but I can't find any literature on tackling this problem. We're running SQL Server 2005, but I could certainly push for an upgrade if 2008 takes of this problem.

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• How to measure productivity loss from slow PCs running Visual Studio?

  - by sunpech

  Many PCs we have on the development team are out-dated and are very slow to run Visual Studio 2008. They should very much be replaced with newer machines. But there's a general reluctance on management/company to buy new machines. How do we come up with numbers and benchmarks to show that these slow PCs are causing a loss in productivity? Obviously we can't call them to sit down with us as we build solutions and/or open various files. Is there an objective way to come up with some kind of reliable numbers that non-technical people can understand? It'd be nice to have a way to measure this across an entire organization on many different PCs running Visual Studio. I'm looking for an answer that does better than using a physical stopwatch. :)

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• Asp.Net Scrapping Grid Pages

  - by SH

  I need cod in C#. Look, i am trying to post the search.aspx page which contains Asp.Net grid. When grid is rendered it loads very first page on the screen and then there are number of pages in the grid header. I scrap first page, and now i want to move on to the next page. All this is being done using following code: HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("http://pubrec3.hillsclerk.com/oncore/search.aspx?" + param); myRequest.Method = "GET"; myRequest.KeepAlive = false; HttpWebResponse webresponse; try { webresponse = (HttpWebResponse)myRequest.GetResponse(); Encoding enc = System.Text.Encoding.GetEncoding(1252); StreamReader loResponseStream = new StreamReader(webresponse.GetResponseStream(), enc); string r = loResponseStream.ReadToEnd(); loResponseStream.Close(); webresponse.Close(); //if (GetRecordCount(r)) ExtractResultTable(bd, ed, r); } catch (Exception ex) { } The above code grabs first page... and now i have to move on to the next page. This is the link which produces a grid with 3 pages. http://pubrec3.hillsclerk.com/oncore/search.aspx?bd=01/01/2008&ed=12/31/2008&bt=O&lb=1000000&ub=1000000000&d=5/6/2010&pt=-1&dt=D,%20MTG&st=consideration Using above code i need to load the 2nd page with the same search criteria but the records found in 2nd page. and then so on. I know there is a trick to navigate through the grid pages. I used it but it did not work on this page. the trick is, you can pass __EVENTTARGET and __EVENTARGUMENT in query string to navigate through the gird but it does not work on this website. I am desperately searching a way, how to cope with this website. i really want this done. i do not want any code but a way to nevigate throgh the grid using query string if it does work. Otherwise please be specific to the problem.

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• Why is my left join not returning nulls?

  - by Griz

  In sql server 2008, I have the following query: select c.title as categorytitle, s.title as subcategorytitle, i.title as itemtitle from categories c join subcategories s on c.categoryid = s.categoryid left join itemcategories ic on s.subcategoryid = ic.subcategoryid left join items i on ic.itemid = i.itemid where (ic.isactive = 1 or ic.isactive is null) and i.siteid = 132 order by c.title, s.title I am trying to get items in their subcategories, but I still want to return a record if there are no items in the category or subcategory. Subcategories that have no items are never returned. What am I doing wrong? Thank you EDIT Modified query with a second left join and where clause, but it's still not returning nulls. :/

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• Does Visual Studio 2010 on x64 crash often? Or is it just on my PC?

  - by JK

  MY VS2010 crashes dozens of times a day. Compare that to 2008 and 2005 which were rock solid. Is 2010 known to be susceptible to crashing? Or could it be my environment? I'm using x64 as a dev box for the first time. The only plugin I has so far is Ankh. It crashes when doing different things. One I've noticed so far that always happens is if I press the key sequence alt-f-s-up (or any cursor key) it will crash every time.

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