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  • Using string constants in implicit conversion

    - by kornelijepetak
    Consider the following code: public class TextType { public TextType(String text) { underlyingString = text; } public static implicit operator String(TextType text) { return text.underlyingString; } private String underlyingString; } TextType text = new TextType("Something"); String str = text; // This is OK. But I want to be able do the following, if possible. TextType textFromStringConstant = "SomeOtherText"; I can't extend the String class with the TextType implicit operator overload, but is there any way to assign a literal string to another class (which is handled by a method or something)? String is a reference type so when they developed C# they obviously had to use some way to get a string literal to the class. I just hope it's not hardcoded into the language.

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  • Always importing too many classes... I think!

    - by Bill
    I have a basic problem with knowing which classes to import for a given application, renderer, AS package, mxml component, etc. There seems to be hundreds of classes (both mx and flash) and I'm never sure which one(s) to import... so I just keep adding import statements until the errors go away. Is there a reference somewhere that I don't know about? Or does this just come with experience? Also... does importing a load of classes actually make the file size larger or does Flex only import the classes used nregardless of what I specify? If it only uses what is needed, why wouldn't everyone just do: import mx.*;

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  • Problem creating site using Microsoft Visual Web Developer Express 2008

    - by Peter
    Hi, this is a very newbie question, sorry! I need to create an aspx website based con C# and am calling some webservices based on some DLL's I already have. Beforem purchasing Visual Studio, I decided to try Microsoft Visual Web Developer Express (is this ok?) creating a Web Application ASP.NET based on Visual C#. I created the form to enter the data which is submitted when clicking the process button. At this point I need to call stuff from the DLL, which I have added in the Solution Explorer via Add Reference, selecting the DLL from the COM list. But whenever I run the project, I always get the error "the type or namespace xxx cannot be found - maybe a using directive or assembler directive is missing" when trying to create the object. What is my stupid mistake? Thanks!

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  • is it legal/ethical to use source code provided in academic papers, or talks given at trade events l

    - by lucid
    so, is it legal to use source code from papers and such: like this paper on perlin noise: [url]http://mrl.nyu.edu/~perlin/paper445.pdf[/url] links to this source code: [url]http://mrl.nyu.edu/~perlin/noise/[/url] and stam's famous talk on fluid dynamics, includes source code throughout, annotated with instructions like "add these macros to the beginning of your code" [url]http://www.dgp.toronto.edu/people/stam/reality/Research/pdf/GDC03.pdf[/url] I'm just not sure if it's legal to copy and paste this to use in your own commercial code. if I were to make my own implementation, it would end up being close to identical, since I'd probably use the source code as a reference. I know very little about copyright law, including how it applies in these situations, and I can never find usage and licensing terms for these. Nor did googling any terms I could think of provide me the specific answer I need. does anyone know for sure what the rules/laws are here, or where I can find the answer?

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  • C++: posix regex error reporting?

    - by Helltone
    I'm writing a small C++ program that parses some strings. I chose to use C's regex.h because I only need POSIX Extended Syntax and I'm concerned with portability. However, I've just noticed that when regexec fails to match, it returns != 0 and I have no idea of what was wrong :-(. I expected to be able to display at least a small message like: line:col: Syntax error or giig sdoigosdigo* sodfg ^ Syntax error Is there a way to know which character did not match? Should I use boost:regex instead? For reference, my regex is: "^" "[ ;\t\n]*" "(" // (1) identifier "[a-zA-Z_][a-zA-Z0-9_]*" ")" "[ \t]*" "(" // (2) non-marking "\[" "(" // (3) non-marking "[ \t]*" "(" // (4..n-1) argument "[a-zA-Z0-9_]+" ")" "[ \t]*" "," ")*" "[ \t]*" "(" // (n) last argument "[a-zA-Z0-9_]+" ")" "]" ")?" "[ \t\n]*" ";" Which matches for instance blablabla[arg1, arg2];

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  • Getting started developing an Adobe Premiere plugin?

    - by Moshe
    How do I get started developing a Premiere Pro plugin? I have Premiere Pro CS3 and a working knowledge of VB.NET. (I have experience with a number of other languages that I can use to get around if need be.) Is there an SDK that I'm looking for? Do I need to contact Adobe to join a developer program of sorts? EDIT: Silly me, I've found an SDK on Adobe's site. Where can I find an API or reference?

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  • IMetadataExchange endpoint purpose

    - by Paresh.Bijvani
    What is the purpose of IMetadataExchange endpoint. Some places i found that if i dont define this endpoint, adding service reference will not work OR creating proxy using svcutil wont work. But both of this working without having IMetadataExchange defined. If we have other endpoint with httpGetEnabled = true, we are able to create proxy from client. Also, some article says that we should delete IMetadataExchange before moving code to production and it should development period only so that other client cant see metadata. Doesnt this stop the behaviour of service having self describing itself? And if I have defined this IMetadataExchange endpoint, how can i see that on browser. Address whoch i have provided for this endpoint is not pulling any metadata in browser.

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  • PHP - ADO recordsets

    - by Josh
    I am referencing a COM component from PHP. This COM component returns records using ADO. I am assuming I will need to reference ADO in PHP for this to function. How do I do this? Secondly (related to the first question) I have run accross ADODB abstraction libraries, however these seem to mostly deal with queries and handle the ADO internally. How do I get the returned ADO recordset into a PHP friendly array, and likewise pass in an ADO array to the COM object? Thank you, Josh

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  • Can you manually add to an iPhone/iPad Navigation Bar a back button item?

    - by MikeN
    I have a reference to a "UIBarButtonItem", is there a way I can add a custom "Back Navigation Button" to that item when it is not part of a Navigation based view? I can add a left button: UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Custom Back" style:UIBarButtonItemStylePlain target:self action:@selector(backAction:)]; menuItem.backBarButtonItem = backButton; //This doesn't seem to work. menuItem.popOverNavigationItem.leftBarButtonItem = backButton; //This shows a normal button So how could I make the leftmost button look like a back navigation button?

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  • How to conform to UITabBarControllerDelegate

    - by 4thSpace
    I have a tabbar based application and do the following to get a reference to the application delegate: MyAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; Which then gives this warning: warning: type 'id <UIApplicationDelegate>' does not conform to the 'UITabBarControllerDelegate' My application delegate header looks like this: #import <UIKit/UIKit.h> @interface MyAppDelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate> { UIWindow *window; UITabBarController *tabBarController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UITabBarController *tabBarController; @end The only methods in the .m file are applicationDidFinishLaunching and dealloc. What else do I need to conform to the protocol?

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  • How to create DSN for SQL Server using C# ?

    - by Pavan Kumar
    using Microsoft.Win32; using System.Runtime.InteropServices; [DllImport("ODBCCP32.dll")] private static extern bool SQLConfigDataSource(IntPtr parent, int request, string driver, string attributes); private void btnDsn_Click(object sender, EventArgs e) { string str = "SERVER=MYDBSERVER\0DSN=MYDSN\0DESCRIPTION=MYDSNDESC\0DATABASE=master\0TRUSTED_CONNECTION=YES"; SQLConfigDataSource((IntPtr)0, 4, "SQL Server ",str); } Reference : http://social.msdn.microsoft.com/Forums/en-US/vscrystalreports/thread/441811b9-c4e9-4d15-97a3-7b92d2c9f318 Can anybody help me remove the following errors?? Error 1 Expected class, delegate, enum, interface, or struct C:\Documents and Settings\Pavan\My Documents\Visual Studio 2008\Projects\CopyDatabase\CopyDatabase\Synchronize.cs 17 23 CopyDatabase Error 2 The name 'SQLConfigDataSource' does not exist in the current context C:\Documents and Settings\Pavan\My Documents\Visual Studio 2008\Projects\CopyDatabase\CopyDatabase\Synchronize.cs 67 13 CopyDatabase

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  • How to paint fully transparent pixels/points in P2D mode?

    - by netzwerg
    According to the Processing Reference, stroke(gray, alpha) allows to set the color and opacity of the stroke. With the default color mode, an alpha value of 255 denotes full opacity, while a value of 0 should correspond to complete transparency. While this works with the (default) JAVA2D renderer, I can't seem to paint fully transparent points in P2D mode. This code clearly renders a pixel at the center of the canvas, even though the alpha value is set to 0 (fully transparent): public class Transparency extends PApplet { @Override public void setup() { size(200, 200, P2D); } @Override public void draw() { stroke(0, 0); point(width / 2, height / 2); } public static void main(String[] args) { PApplet.main(new String[] { Transparency.class.getSimpleName() }); } } What's wrong here?

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  • IIS, Impersonation and COM Interop Premission Denied

    - by user315690
    Hello we are in the throws of integrating a Document Management System with Dynamic CRM 4, have done similar things previously but in this instance we are having to reference a COM dll. We've configured the asp.net page (we are bringing the info in via a i-Frame in CRM), setting Impersonation = True in the Webconfig and ensured that Windows authentication is the only method available within IIS. All works as we would expect when logged into the server itself and the page happily does off finds all the relevant documents for the CRM account and presents them to a user in a nice Infragistics CRM styled grid. However trying this from a client workstation we get the following: System.Runtime.InteropServices.COMException (0xC0042335): Permission denied. Impersonation appears to be passing over the correct details but nothing we've tried thus far has been able to make this work outside of logging into the server. Any thoughts as to what we are missing?

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  • Can't get Apache 2.2.21 to compile with OpenSSL support

    - by angstwad
    Alright -- having a bad couple days here compiling Apache 2.2.21 on CentOS 5.7 with the following configure commands: ./configure --enable-ssl=shared --with-ssl=/usr/local/openssl I've compiled from source OpenSSL 1.0.0e from source: ./config --prefix=/usr/local --openssldir=/usr/local/openssl shared zlib-dynamic I attempt to start Apache and it returns: httpd: Syntax error on line 54 of /usr/local/apache2/conf/httpd.conf: Cannot load /usr/local/apache2/modules/mod_ssl.so into server: /usr/local/apache2/modules/mod_ssl.so: undefined symbol: SSL_get_servername If I look at how the libraries are linked, this is what I get: [root@web1 modules]# ldd mod_ssl.so libssl.so.6 => /lib64/libssl.so.6 (0x00002aaaaace4000) libcrypto.so.6 => /lib64/libcrypto.so.6 (0x00002aaaaaf30000) libdl.so.2 => /lib64/libdl.so.2 (0x00002aaaab281000) libz.so.1 => /lib64/libz.so.1 (0x00002aaaab486000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00002aaaab69a000) libc.so.6 => /lib64/libc.so.6 (0x00002aaaab8b5000) libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2 (0x00002aaaabc0e000) libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x00002aaaabe3c000) libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00002aaaac0d1000) libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x00002aaaac2d4000) /lib64/ld-linux-x86-64.so.2 (0x0000555555554000) libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0 (0x00002aaaac4f9000) libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00002aaaac702000) libresolv.so.2 => /lib64/libresolv.so.2 (0x00002aaaac904000) libselinux.so.1 => /lib64/libselinux.so.1 (0x00002aaaacb19000) libsepol.so.1 => /lib64/libsepol.so.1 (0x00002aaaacd32000) Basically, I've tired compiling from source OpenSSL (both 0.9.8r and 1e), having yum reinstall from the repos, done a make clean and remade both OpenSSL and Apache numerous times -- but I can't get it to compile into the apache base or dynamically as a shared object file. What am I doing wrong here? Update 1: After doing a make clean and make distclean, I've reconfigured with the same parameters as above without any effect. The config.log is at Pastebin. Update 2: Modifying the LD_LIBRARY_PATH had no effect on the lib-deps of mod_ssl.so. UPDATE 3: I've compiled and recompiled many times, and verified with ldconfig that the OpenSSL libs dir is in my path, and included in ld.so.conf. Still cannot get httpd/mod_ssl to load the library at runtime.

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  • Change namespace/filesystem folder names in Visual Studio

    - by Rosarch
    I'm trying to change a namespace in Visual Studio. My folder structure looks something like this: GameAlpha/ GameAlpha.sln GameAlphaRelease/ GameAlphaTest/ GameAlphaLevelEditor/ These include namespaces like GameAlphaRelease. I want to change all this to GameBetaRelease. Before this process, it built fine. First, I changed the solution and project files from Alpha to Beta. Then, I did a "find-replace-all" on the namespace. Finally, I went through the properties of each project and changed the "Assembly Name" and "Default Namespace" to the appropriate Beta title. However, now the solution does not build. The error is: GameAlpha.accessor: The reference to 'GameAlpha.exe' was not found in the list of this projects references. (Project: GameBetaTest) What am I doing wrong? If I remove project GameBetaTest, the solution builds just fine. Also, what is the preferable way to change the names of the folders in the file system?

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  • Visual Studio 2008 "Publish" option generates some empty folders

    - by Kevin Pang
    When I right click an ASP.NET MVC solution and select the "Publish" option, the final output it generates contains several empty top-level folders. For instance, the "Service References" folder that gets automatically added when you add a service reference to a web app is generated without any files in it. Why are these folders generated at all if there's no content in them? Is there a way to let Visual Studio know to not bother publishing them? This isn't a big deal since it doesn't really affect the app (and before deploying I can always delete the empty folders), but it's a little annoying.

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  • XML parsing with SAX | how to handle special characters?

    - by cedar715
    We have a JAVA application that pulls the data from SAP, parses it and renders to the users. The data is pulled using JCO connector. Recently we were thrown an exception: org.xml.sax.SAXParseException: Character reference "&#00" is an invalid XML character. So, we are planning to write a new level of indirection where ALL special/illegal characters are replaced BEFORE parsing the XML. My questions here are : 1. Is there any existing(open source) utility that does this job of replacing illegal characters in XML? 2. Or if I had to write such utility, how should i handle them? 3. Why is the above exception thrown? Thank You.

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  • Visual C# GUI Designer basic tutorial

    - by cusack
    Hi, can you recommend a Visual C# Form Designer tutorial that is targeted at experienced programmers who have at least a basic knowledge of C# but are new to the VS C# Form Designer. At least it shouldn't be targeted at programming newbs, like Introduction to Visual C# 2008 Express Edition (it explains how a comment looks like in C#). So far I've found C# Programming Tutorial - Programming Winforms in C# on stackoverflow. Wishlist: ;-) I'm more interested in focus on the designer itself rather than an explanation of single gui-elements. In other words explaining separation between generated-code, what to not edit manually (visual-c#-designer-responsibility) and on the other hand the parts for which the programmer himself is responsible. So a little more abstract best-practice point of view pointing out some caveats would be great as well. I would prefer text over video as well, but that's minor. /Wishlist Perhaps even a Microsoft reference specific to the Visual c# forms designer (which I seem to have been unable to find) would be helpful.

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  • Counting number of children in hierarchical SQL data

    - by moontear
    Hello, for a simple data structure such as so: ID parentID Text Price 1 Root 2 1 Flowers 3 1 Electro 4 2 Rose 10 5 2 Violet 5 6 4 Red Rose 12 7 3 Television 100 8 3 Radio 70 9 8 Webradio 90 For reference, the hierarchy tree looks like this: ID Text Price 1 Root |2 Flowers |-4 Rose 10 | |-6 Red Rose 12 |-5 Violet 5 |3 Electro |-7 Television 100 |-8 Radio 70 |-9 Webradio 90 I'd like to count the number of children per level. So I would get a new column "NoOfChildren" like so: ID parentID Text Price NoOfChildren 1 Root 8 2 1 Flowers 3 3 1 Electro 3 4 2 Rose 10 1 5 2 Violet 5 0 6 4 Red Rose 12 0 7 3 Television 100 0 8 3 Radio 70 1 9 8 Webradio 90 0 I read a few things about hierarchical data, but I somehow get stuck on the multiple inner joins on the parentIDs. Maybe someone could help me out here. moon

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  • I just restarted Apache and now the server is down

    - by James
    I am pretty terrified right now. I'm scared I'm going to get a call in a couple minutes from a hundred people saying the website doesn't work. I was at the terminal changing some configuration files when I went to restart the server to update the .conf files with this command: /etc/init.d/apache2 graceful After I ran that, none of the websites work and I have no idea what to do. There are about 100 errors I am getting according to the log files. They all begin with "PHP Notice" and most relate to "use of undefined constant" Also, I just spoke with a coworker, describing what I did, and he noticed that there are two installations of apache on the server and that I restarted the one that we don't use. This is what the error log says (assuming it's the correct error log): [Wed Jan 05 11:52:06 2011] [notice] Graceful restart requested, doing restart Warning: DocumentRoot [/u/apps/staging/antetr/current/public/] does not exist [Wed Jan 05 11:52:08 2011] [warn] NameVirtualHost *:80 has no VirtualHosts (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs (2)No such file or directory: apache2: could not open error log file /u/apps/production/madfilmdash/current/log/apache-error.log. Unable to open logs FINAL UPDATE: Ok, I fixed it. The problem was (as you experts facepalming probably know) that it couldn't access an error log in the directory I was working in. I created an empty error log file and tried the restart command again and now all the sites are back up... Though my original problem is still there.. Thanks to all those who offered advice, it really helped and let me breathe for a moment.

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  • Subsonic 3 Simple Repository And Transactions

    - by ChrisKolenko
    Hey everyone, So this is what I have so far. Am I doing something wrong or is there a bug in 3.0.0.3? var Repository = new SimpleRepository("DBConnectionName"); using (TransactionScope ts = new TransactionScope()) { using (SharedDbConnectionScope scs = new SharedDbConnectionScope("connstring", "providerName")) { try { for (int i = 0; i < 5; i++) { Supplier s = new Supplier(); s.SupplierCode = i.ToString(); s.SupplierName = i.ToString(); Repository.Add<Supplier>(s); } ts.Complete(); } catch { } } } I'm getting an error in SubSonic DbDataProvider public DbConnection CurrentSharedConnection { get { return __sharedConnection; } protected set { if(value == null) { __sharedConnection.Dispose(); etc.. __sharedConnection == null :( Object Null Reference Exception :(

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  • Rewriting VB.NET Lambda experession as a C# statement

    - by ChadD
    I downgraded my app from version 4 of the framework to version 4 and now I want to implement this VB.NET lambda function statement (which works on 3.5) Dim colLambda As ColumnItemValueAccessor = Function(rowItem As Object) General_ItemValueAccessor(rowItem, colName) and rewrite it in C#. This was my attempt: ColumnItemValueAccessor colLambda = (object rowItem) => General_ItemValueAccessor(rowItem, colName); When I did this, I get the following error: Error 14 One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll? C:\Source\DotNet\SqlSmoke\SqlSmoke\UserControls\ScriptUserControl.cs 84 73 SqlSmoke However, when I downgraded the app from version 4.0 of the framework to 3.5 (because our users only hae 3.5 and don't have rights to install 4.0). when I did this, the reference to "Microsoft.CSharp" was broken. Can I rewrite the VB.NET command in C# using syntax that is valid in C# 3.5 as I was able to in VB.NET? What would the syntax be?

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  • Should I Make These Vectors Classes or Structs in C#

    - by dewald
    I am creating a geometry library in C# and I will need the following immutable types: Vector2f (2 floats - 8 bytes) Vector2d (2 doubles - 16 bytes) Vector3f (3 floats - 12 bytes) Vector3d (3 doubles - 24 bytes) Vector4f (4 floats - 16 bytes) Vector4d (4 doubles - 32 bytes) I am trying to determine whether to make them structs or classes. MSDN suggests only using a struct if the size if going to be no greater than 16 bytes. That reference seems to be from 2005. Is 16 bytes still the max suggested size? I am sure that using structs for the float vectors would be more efficient than using a class, but what should I do about the double vectors? Should I make them structs also to be consistent, or should I make them classes?

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  • PySide using Style Sheets to change QtoolBox

    - by efi_ex
    I'm Wondering if somebody knows a better reference than the QT one for style sheets. I try to change the background of the content from a QToolBox but background-color only changes the header of the toolbox and the background of the content it reveals is left in a standard color. I then tried to change the bg of QWidget which worked but left me with problems now at Radiobuttons and Checkboxes, i also think changing QWidget isn't a good solution. The first picture is with Qt standard colors (this is a maya tool) the second when i change QWidget http://i.imgur.com/MNlSedx.png?1 http://i.imgur.com/wuplpmw.png?1

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  • Explicit return form a Ruby method - implementation hiding, reuse and optimisations.

    - by Chris McCauley
    Hi, Rather than allowing a Ruby method to blindly return the last statement evaluated, is there any advantage to returning nil explicitly? In terms of implementation hiding and reuse, it seems dangerous to blindly allow the last expression evaluated to be returned - isn't there a danger that a user will rely on this only to get a nasty surprise when the implementation is modified? Surely returning nil would be better unless an explicit return value was given. Following on, is there an optimisation that Ruby can make when the return is a simple type rather than a reference to a more complex object? Chris

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