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  • Unreachable code detected

    - by habbo95
    Hi all, I'm getting a "Unreachable code detected" message in Visual Studio at the point con.close() in my code below. Can you spot what I've done wrong? Thanks private int chek1(String insert) { OleDbConnection con = new OleDbConnection("provider=microsoft.jet.oledb.4.0;data source=d:\\sdb.mdb"); OleDbCommand com = new OleDbCommand("select count(*) from sn where sn='" + insert + "\'", con); con.Open(); int po = (int)com.ExecuteScalar(); if (po > 0) return 1; else return 0; con.Close(); }

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  • Parsing C# code to evaluate expressions (basically, implementing Intellisense)

    - by halivingston
    I'm trying to evaluate C# code as it gets typed, think of it as if I'm trying to write an IDE. So a person types code, I want to find out what code did he just write: String x = ""; I want to now register that x is a type of String. And now everytime the user types x again, and I want to show him all the things he can do with x, basically like Visual Studio Intellisense. Will I need some lexers or parsers for this? Will that make it easier? I've heard VS 2010 has some features around this that Microsoft has released. Any ideas?

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  • C/C++ function definitions without assembly

    - by Jack
    Hi, I always thought that functions like printf() are in the last step defined using inline assembly. That deep into stdio.h is burried some asm code that actually tells CPU what to do. Something like in dos, first mov bagining of the string to some memory location or register and than call some int. But since x64 version of Visual Studio doesent support inline assembler at all, it made me think that there are really no assembler-defined functions in C/C++. So, please, how is for example printf() defined in C/C++ without using assembler code? What actually executes the right software interrupt? Thanks.

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  • How to read, edit and write xls files, and then export to SQL Server

    - by tuanvt
    I have an excel file that have the list of contacts( about 10 k of them) that I need to push into my SQL Server database. So, I am writing an .net windows program using visual studio 2008 to read the files, generate random password for each contact, and then push these information in to my SQL Server database. It was easy to handle excel file in 2003 but now my computer have office 2007 in it and things seem to changed. I am digging on Microsoft.Office.Interop.Excel but it is seem to be a lot more complicated than before.

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  • C++ IDE for OSX

    - by gprime
    When i was at university i wrote a lot of C++. I primarily used either Visual Studio (at the time it was version 6) or VIM (if i was on linux) as an editor to write my code. Since i have graduate and have been working primarily in web programming i have stopped writing C++. Since i graduated i have also bought myself and started using my Mac exclusively. I am now starting to get back to my C++ coding (just for fun) and would like an opinion on good IDE's for Mac. I am currently using xCode which seems kinda cool because it has everything built into it. Do any of you have any other IDE's that you would suggest that i give a shot or should i just stick to xCode?

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  • Getting automatic matching brace in vim

    - by Bob
    I spend WAY to much time fumbling around because vim doesn't handle closing braces like most IDEs do. Here's what I want to happen: type this: if( whatever ) { <CR> where <CR> mean hit the enter key and get this: if( whatever ) { | } where | is the position of the cursor. It's what Eclipse does. It's what Visual Studio does. And it's what I want Vim to do. I've seen a few plugins, tried a few, and none of them seem to give me this behavior. Surely I can't be the first programmer to want this.

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  • Why can I check some event handlers for null, some not?

    - by Inno
    Hi, I have a ugly piece of code that adds event handlers. The problem is, if the code is called multiple times, the event handlers are called multiple times. To solve the problem, I remove the event handler first and then add it. Now I've seen the following behaviour: Some event handlers can be checked like: if (object.event == null) { // // Code // } others of the form if (object.object.event == null) { // // Code // } I get a message like 'object.object.event' may only occur left of -= or +=. (Since I'm using a german version of visual studio, I don't know the correct translation to english). I have no idea why the behaviour looks this inconsequent so I would be grateful for some information on this. To be more specific: It's user control. if (myControl.Event == null) { // // works // } if (myControl.TreeView.NodeMouseClick == null) { // // doesn't work // }

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  • Warning of "Control may reach end of non-void function"

    - by Cloud_cal
    I ran a C++ program in Xcode, and encountered a warning of "Control may reach end of non-void function". Here is the code: Node* search(Node* head, int x) { if(!head) return NULL; else if(x == head->key) return head; else if(x < head->key) search(head->lchild, x); else search(head->rchild, x); } I got the same warning when compiling it in Linux, but got the correct result. But in Xcode, the result was wrong. By the way, I got the correct answer and no warning in Visual Studio.

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  • Equivalent of c# 'as' command in c++?

    - by Sam
    In c# you can use as to convert a type or get null: Object o = Whatever(); String s = o as String; Is there a similar easy way to achieve this in c++? I'm using Visual Studio 2010, if thats important. [update] Remember, there is a very important difference between casting and using as. Casting (at least in c#) will throw an exception if the type does not match: Object o = null; String s = (String)o; // will crash.

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  • Stack around variable corrupted when using cvBlobsLib (OpenCV)

    - by jpromvi
    I am trying to do simple image processing with OpenCV and the cvBlobsLib in Visual C++ 2008, and I get an error message when I try to create a CBlobResult object IplImage* original = cvLoadImage("pic6.png",0); cvThreshold(original, original, 100, 255, CV_THRESH_BINARY); CBlobResult blobs = CBlobResult(original, NULL, 255); The message is the following: Run-Time Check Failure #2 - Stack around the variable blobs was corrupted Why does this happen? How should I create this object? Thank you very much for your help.

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  • How to connect these together?

    - by Biertago
    I've got a mysql database created by phpMyAdmin and I want to use it in my Qt project. I tried it on Visual Studio 2010 with an qt addon but it didn't work neither. In Qt Creator, I add: QT += sql in a .pro file and include: #include <QSqlDatabase> in the main file but there's a driver error. I don't know even where to start and each google page shows something different. I tried to look for some guide but there is nothing which concerns everything in []s.

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  • How to mimic an excel spreadsheet on a website in vb.net?

    - by user1439659
    I am building a website to capture data. I have many spreadsheets that are used for data entry or capture. Now I want to mimic these complex spreadsheets on the web forms but I am unsure of the correct control to use. Data entry must be allowed and live calculations also need to be made similar to formulas on normal excel spreadsheets. Later on the data must be captured into an SQL table. What would be the best control to use or method to mimic that functionality, albeit that the spreadsheet component is no longer available in visual studio 2010. Is it a data grid? Thanks

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  • html links & hover events over certain locations on an image.

    - by Tommy
    So i created a web site a long time ago using a designer alot like frontpage + expression design put together, and since then Ive gotten more into coding, and I'm learning html, CSS, and all that good stuff.. and i have this re-designed header that Ive made here: http://prntscr.com/8zct So what I need to know, is how i can get it so that when a user clicks on one of the links in the header design it will redirect to a page. and also if possible, how to make it so when a user hovers over a link a drop down may appear with other options. As me being quite new to this sort of stuff, could anybody help me achieve this? PS. I'm working in Visual Studio with ASP. but that doesn't change anything about the html and css stuff. just letting you guys know.

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  • MVC3 application I want javascript methods to fire on passed in route values

    - by DavieDave
    I have an MVC3 application in Visual Studio 2010. I have a view with several dropdowns that do javascript calls to populate dropdowns based on the selected value, some of which are disabled initially. That all works great with the initial state of nothing. If I however pass routevalues to the dropdowns from a redirect to this action, I do get the value set correctly but it's not enabled like it should be on the dropdown for example and when I post the form, the ones that are greyed out are not passed back on the form. How can I correct this?

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  • How do I remove a control if not a specific type?

    - by joek1975
    I have a control that I need to restrict the types of child controls that it can contain during design time (dragging a new control onto an existing control on the form designer). I tried to do this by overriding the OnControlAdded event: Protected Overrides Sub OnControlAdded(ByVal e As System.Windows.Forms.ControlEventArgs) MyBase.OnControlAdded(e) If e.Control.GetType() IsNot GetType(ExpandablePanel) Then MsgBox("You can only add the ExpandablePanel control to the TaskPane.", MsgBoxStyle.Exclamation Or MsgBoxStyle.OkOnly, "TaskPane") Controls.Remove(e.Control) End If End Sub This seems to work, however I get an error message from Visual Studio immediately after the control is removed: 'child' is not a child control of this parent. What does this mean? How can I accomplish this without errors occurring?

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  • What is the precedence of characters when sorting in MySQL, PHP, or just in general?

    - by FireCoding
    Question: Where can I find the precedence of characters when sorting in MySQL, PHP, or just in general on Linux and Windows OS? For example, everybody knows that a comes before b when performing an ascending sort on a string in MySQL. But what about other characters? Does the dollar-sign $ come before asterisk * ? Does a space come before an exclamation-mark? etc... What dictates the sort order? Does it use underlying ascii / UTF-8 values? Is it different for different technologies? Technologies to consider: Databases - MySQL / SQL / SQLite / Oracle / etc Programming languages (for string-sorting functions) - PHP / Javascript / ASP.NET / Visual C# / Python / Ruby / Objective C OS (i.e., sorting files by filename) - Windows / Linux / MacOS / iOS / Android

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  • How to make my iphone app icon update like the weather app icon?

    - by Toret
    I have an application that I'm currently building that requires me to display a visual update on the application it self. example: The weather app displays 14 degrees celcius and some clouds as its application icon. When the weather changes there is an update to the way the icon looks without having to open the weather app. The applications icon changes to reflect the update in weather. You can then open the weather app to get more information if need be. In my application I need to have an update system like that which shows the user information without opening the application. If they would like more information they can open the application then. I have no idea how to accomplish this task at the moment. I hope someone will be able to help or point me in the right direction. Thank you for your time.

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  • closing sockets on linux and windows

    - by robUK
    Hello, gcc 4.4.4 c89 Visual Studio VC++ 2008 I am writing a cross platform client server application. It will run on both linux and windows. However, I am just wondering what I have done for closing the sockets is correct. I close the file descriptor. However, if there is a problem with closing it. What is the best way to handle this. Maybe some data is still being sent or received? Many thanks for any advice, if(close(sockfd) == -1) { #if defined ( _WIN32 ) fprintf(stderr, "[ %d ] [ %s ] [ %s ] [ %d ]\n", WSAGetLastError(), strerror(errno), __func__, __LINE__); #elif( __linux__ ) fprintf(stderr, "[ %s ] [ %s ] [ %d ]\n", strerror(errno), __func__, __LINE__); #endif return CS_FAILURE; }

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  • Remove specified text from beginning of lines only if present (C#)

    - by Zach
    I have a textbox in which the user can edit text, in a scripting language. I've figured out how to let the user comment out lines in one click, but can't seem to figure out how to uncomment properly. For example, if the box has: Normal Text is here More normal text -- Commented text -- More commented text Normal Text again --Commented Text Again So, when the user selects any amount of text and decides to uncomment, the "--" is removed from the beginning of the lines that have it. The lines without the "--" should be unaffected. In short, I want an uncomment function that performs similar to the one in Visual Studio. Is there any way to accomplish this? Thanks

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  • C# remove duplicates from List<List<int>>

    - by marseilles84
    I'm having trouble coming up with the most efficient algorithm to remove duplicates from List<List<int>>, for example (I know this looks like a list of int[], but just doing it that way for visual purposes: my_list[0]= {1, 2, 3}; my_list[1]= {1, 2, 3}; my_list[2]= {9, 10, 11}; my_list[3]= {1, 2, 3}; So the output would just be new_list[0]= {1, 2, 3}; new_list[1]= {9, 10, 11}; Let me know if you have any ideas. I would really appreciate it.

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  • Detecting inconsistent revisions of shared sources in SVN

    - by maxim1000
    I have an SVN repository containing several components: LibraryA LibraryB - depends on LibraryA Application - depends on LibraryB and LibraryA More detailed structure (branches and tags are not related to the problem): LibraryA LibraryA_code LibraryB LibraryB_code svn:externals to a fixed revision R1 of LibraryA_code Application Application_code svn:externals to a fixed revision R2 of LibraryA_code svn:externals to a fixed revision R3 of LibraryB_code The problem I'm trying to solve is automatic detection of situation when R2 differs from R1 (breaking expectations of LibraryB_code) and notification about this (e.g. build failure). I'll describe in an answer the only solution which I see for now, but I hope for something more elegant :) Environment: Windows, Visual Studio, SVN.

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  • Why can't my C# app create files in Windows 7?

    - by WindyCityEagle
    I have a C# app that creates a settings file for itself to store the current state of certain visual elements. This app works just fine on any machine that isn't running Windows 7, but on those machines we get an error that the settings file can't be created because the user doesn't have permission. Now, I could fix this issue by going to each computer, logging in as the administrator and giving the user read and write access on the program folder for the application that we've installed, but there has to be a better way. It seems like in XP, you got write access on the folders you created by default, but that isn't the case anymore. Is there a setting I need in the setup package to make this work?

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  • Windows Service is not Working.

    - by prateeksaluja20
    I had made a windows service in visual studio 2008 in C#.inside the service i had written only single line code try { System.Diagnostics.Process.Start(@"E:\Users\Sk\Desktop\category.txt"); } catch { } then i add the project insatller & change the serviceProcessInstaller1 Account proerty as local system Also change the serviceInstaller1 start type proerty as Automatic. then i build the project.it was succesfull. after that i add another project that was setup project.i had added pprimary project output & i had added the custom action as "Primary output from DemoWindowsService (Active)".then buil the setup.setup was build sucessfully.then i install the setup & then went to services start the service.service stated properly butit was not performing the task. i had checked the path is correct & also i tried to do System.Diagnostics.Process.Start(@"E:\Windows\system32\notepad.exe") but still result is same.i tried alot but not getting the ans soleasse help me to solve this problem.

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  • Creating AVI files in OpenCV

    - by user80003
    Hello. I have been trying to create an application using OpenCV and Visual Studio 2008, to capture images from a webcam, apply a filter to them, and then write them to an AVI file. Everything works, except creating the AVI file. The problem is that it works on my computer, but it doesn't work on my colleague's computer. The reason for that (I think) is that he does not have the necessary video encoders for OpenCV to use. The cvCreateVideoWriter function does not return NULL, but I end up with a 0kb file on the disk.

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  • Is it possible to remove folders from a web application build process in vs 2010?

    - by JL
    I had previously asked this question. At the time I was working with VS 2008. To restate the question. I have a web application that generates 1000's of small xml files in a certain directory. I would like to exclude this directory from the build process in visual studio 2010. With vs 2008 it was not possible. Has anything changed? Besides the general wait for VS to iterate through this directory with each build, it also strains my system resources, so I would like to exclude it from the project, but the dir and files need to physically exist on disk, because they are part of the application. Any OOB VS 2010 solutions, or any good workarounds? Thanks

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