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  • how many color combinations in a 24 bit image

    - by numerical25
    I am reading a book and I am not sure if its a mistake or I am misunderstanding the quote. It reads... Nowadays every PC you can buy has hardware that can render images with at least 16.7 million individual colors. Rather than have an array with thousands of color entries, the images instead contain explicit color values for each pixel. A 24-bit display, of course, uses 24 bits, or 3 bytes per pixel, for color information. This gives 1 byte, or 256 distinct values each, for red, green, and blue. This is generally called true color, because 256^3 (16.7 million) He says 1 byte is equal to 256 distinct values. 1 byte = 8 bits. 8^2 bits = 64 distinct colors right ?? It's not adding up right to me. I know it might be something simple to understand, but I don't understand.

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  • Reading membership section from web.config in C#

    - by PlayKid
    Hi there, I have created a custom MembershipProvider class, so far so good, however, I am not sure how to read the configuration settings from the web.config file. I tried to search from Google and Stackoverflow, seems like someone also experiencing my problem and asked, but no answer has been given. It should be a simple thing, but I am very new in web development, so reading settings from web.config seems away too technical to me. Here is my settings: <membership defaultProvider="CustomMembershipProvider"> <providers> <clear/> <add name="CustomMembershipProvider" type="Test.Models.CustomMembershipProvider,Test" passwordFormat="Hashed" connectionStringName="ApplicationServices" minRequiredPasswordLength="8" minRequiredNonalphanumericCharacters="0" maxInvalidPasswordAttempts="5" enablePasswordReset="false" enablePasswordRetrieval="false" requiresQuestionAndAnswer="false" applicationName="/"/> </providers> </membership I would like to read the minRequiredPasswordLength setting, please assist. Thanks alot in advance.

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  • How can i get a file from remote machine?

    - by programmerist
    How can i get a file from remote computer? i know remote computer ip and 51124 port is open. i need this algorith: 1) Connect 192.xxx.x.xxx ip via 51124 port 2) filename:123456 (i want to search it on remote machine) 3) Get File 4) Save C:\ 51124 port is open. can i access and can i search any file according to filename? My code is below: IPEndPoint ipEnd = new IPEndPoint(IPAddress.Any, 51124); Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP); sock.Bind(ipEnd); sock.Listen(maxConnections); Socket serverSocket = sock.Accept(); byte[] data = new byte[bufferSize]; int received = serverSocket.Receive(data); int filenameLength = BitConverter.ToInt32(data, 0); string filename = Encoding.ASCII.GetString(data, 4, filenameLength); BinaryWriter bWrite = new BinaryWriter(File.Open(outPath + filename, FileMode.Create)); bWrite.Write(data, filenameLength + 4, received - filenameLength - 4); int received2 = serverSocket.Receive(data); while (received2 0) { bWrite.Write(data, 0, received2); received2 = serverSocket.Receive(data); } bWrite.Close(); serverSocket.Close(); sock.Close();

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  • Stop sign icon in VS2005 Express solution explorer

    - by Andy Bisson
    What does a small stop sign icon on a file in solution explorer mean? Someone asked the same question a year ago Original Question but the answer provided is of no help. The icon looks like this: Suffice to say that the sign is not one presented in the VS documentation and is a UK Stop sign (red circle with a white horizontal bar) not a US one. The project is WebKit and the build process cannot find AuthenticationCF.h even though the file is present. I presume the sign might shed some light on this. Thanks, Andy

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  • Code crashing compiler: main() returning a struct instead of an int

    - by AndrejaKo
    Hi! I'm experimenting with a piece of C code. Can anyone tell me why is VC 9.0 with SP1 crashing for me? Oh, and the code is meant to be an example used in a discussion why something like void main (void) is evil. struct foo { int i; double d; } main (double argc, struct foo argv) { struct foo a; a.d=0; a.i=0; return a.i; } If I put return a; compiler doesn't crash.

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  • Creating a good directory structure

    - by numerical25
    This might be a silly question but I am still learning. I have read several books on creating application and creating a good directory structure. When people talk about creating a directory structure, do they mean the folders you make within the solution explorer (folders you actually find inside of a .sln file) or do they mean setting up and creating folders that reside in the same folder as your .sln file or your compiled application (.exe). I figured the solution explorer folders are different from a typical windows folder cause the folders I create inside my .sln file are no where to be found on my windows system.

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  • resources at class library

    - by Night Walker
    Hello I want to add some xml file as resource to my class library project . Any idea how to do so , and call it later? In windows application i would do it like ClassLibrary1.Properties.Resources.file.xml But here it didn't worked any idea how i do it here ?

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  • Problem in doing Add Web Reference (http://.../service.asmx)

    - by flopdix
    I am trying to Add a Web Reference to http//.../service.asmx file in my project. First it gives me an error: "... Unable to download following files from: http://.../service.asmx?wsdl Do you want to skip these files and continue ..." When i click 'Yes', the proxy gets created with .disco and other reference files, but does not adds .wsdl file. Other option i tried, i used http//.../service.asmx?wsdl to add web reference. In this case, i dont get any error, but the proxy gets added with .wsdl and reference files, but it does not adds .disco file. Can someone help me on why this is happening? I thought, adding web reference to .asmx should add everything under the proxy.

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  • How can i do re coding without assign null value?

    - by Phsika
    How can i do below without assign null value "Tex=null"? static void Main(string[] args) { FileInfo f = new FileInfo("C:/temp/Arungg.txt"); StreamWriter Tex; Tex = null; if (!f.Exists) { f.CreateText(); } else { Tex = f.AppendText(); } Tex.WriteLine("Test1"); Tex.WriteLine("Test2"); Tex.Write(Tex.NewLine); Tex.Close(); Console.WriteLine(" The Text file named Arungg is created "); }

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  • Web based interface for open SSL client certificates

    - by Felix
    Hi there! We are currently developing a apache2-based web application and want to invite some beta testers to give it a try. To be on the safe side, access should be provided by individual browser certificates (.p12) which are issued using a (fake) CA. Our users should be passing a complete register/login process and some of them will be granted administrative privileges within the application. That's why a preceding simple web-based authentication won't be sufficient. Atm, I using a serverside shellscript to generate the certificates each time. Do you know about a small, web-based tool to simplify the process of generating / revoking those certificates? Maybe an overview of the CA's index.txt plus the option to revoke a cert and a link to download them directly?

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  • Err Web Service?

    - by j-t-s
    Hi All I am trying to implement a feature. But I've never had anything to do with "Web Services" before, other than using them. I have a desktop application, and I want that application to be able to sort of "post" some information (i.e. email address, username, user-selected options (just plain text) etc) to an application or "web service" on my ASP.NET web server. Can somebody please guide me in the right direction? How would I accomplish this? Thank you :) Jason

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  • Passing a web service an unknown number of parameters

    - by Billyhole
    I'm relatively new to utilizing web services. I'm trying to create one that will be accepting data from a ASP.Net form whose input controls are created dynamically at runtime and I don't how many control values will be getting passed. I'm thinking I'll be using jQuery's serialize() on the form to get the data, but what do I have the web service accept for a parameter? I thought maybe I could use serializeArray(), but still I don't know what type of variable to accept for the JavaScript array. Finally, I was thinking that I might need to create a simple data transfer object with the data before sending it along to the web service. I just didn't wanna go through with the DTO route if there was a much simpler way or an established best practice that I should follow. Thanks in advance for any direction you can provide and let me know I wasn't clear enough, or if you have any questions.

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  • Figuring out what makes a C++ class abstract in VS2008

    - by suszterpatt
    I'm using VS2008 to build a plain old C++ program (not C++/CLI). I have an abstract base class and a non-abstract derived class, and building this: Base* obj; obj = new Derived(); fails with the error "'Derived': cannot instantiate abstract class". (It may be worth noting, however, that if I hover over Base with the cursor, VS will pop up a tooltip saying "class Base abstract", but hovering over Derived will only say "class Derived" (no "abstract")). The definitions of these classes are fairly large and I'd like to avoid manually checking if each method has been overridden. Can VS do this for me somehow? Any general tips on pinpointing the exact parts of the class' definition that make it abstract?

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  • Any recommended VC++ settings for better PDB analysis on release builds

    - by Brian R. Bondy
    Are there any VC++ settings I should know about to generate better PDB files that contain more information? I have a crash dump analysis system in place based on the project crashrpt. Also, my production build server has the source code installed on the D:\, but my development machine has the source code on the C:\. I entered the source path in the VC++ settings, but when looking through the call stack of a crash, it doesn't automatically jump to my source code. I believe if I had my dev machine's source code on the D:\ it would work.

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  • Is stack address shared by Heap addresses ??

    - by numerical25
    I read On most operating systems, the addresses in memory starts from highest to lowest. So I am wondering if the heap, stack, and global memory all fall under the same ordering..? If I created... pointerType* pointer = new pointerType //creates memory address 0xffffff And then created a local varible on the stack localObject object would localObjects address be 0xfffffe Or is heap and stack ordering completely different.

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  • What is a good/free tool to auto generate documentation for VS 2008 Express?

    - by melaos
    Hi guys, I'm new to the wonderful world of .net development, and I'm currently using c# 3.0 and I'm wondering is there any good/free/open source tool to auto generate documentation for the project that I work on based on the /// summary comments like or whatever the in thing it is for vs2008. As I recall back in .net 1.1 we used to use that with a tool call ndoc, but I can't find much about ndoc and VS 2008 express. So can anyone please recommend me some good tools or point me to the right direction? thanks. Updates: I'm currently looking into Doxygen..

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  • Why must use "out" instead of ref ?

    - by Phsika
    i wrote some code blocks about ref -out declaration. i think that ref is most useful out. Ok. why i need to use out. i can use always ref everytime: namespace out_ref { class Program { static void Main(string[] args) { sinifA sinif = new sinifA(); int test = 100; sinif.MethodA(out test); Console.WriteLine(test.ToString()); sinif.MethodB(ref test); Console.WriteLine(test.ToString()); Console.ReadKey(); } } class sinifA { public void MethodA(out int a) { a = 200; } int _b; public void MethodB(ref int b) { _b = b; b = 2*b; } } }

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  • Updating display of elements on the web page without refreshing the whole page

    - by ivorossi3
    Last time I coded a web application was almost 10 years ago. I used Java/JSP/HTML/CSS etc. I've been coding non-web applications only ever since. When I look at modern sites now (like this one), I realize how my web development skills are obsolete. Maybe the most obvious "feature" that I wouldn't know how to implement now is the update of elements on the page after user input without having to refresh the whole page (e.g. the voting/downvoting here updates the vote count without reloading the whole page). What are the basic technologies behind this?

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  • Validating call to web service against schema before sending request

    - by Cen
    I am calling a web service (written in Java) in my web app. I use the WSDL to generate proxy classes using the wsdl.exe command line tool. Everything is working fine. However, I have found out that the web service is not doing any data validation at all when they receive a request from my app. Hence, if I happen to send one minute piece of data that isn't exactly what they want, I receive a general fault error in return, with no specifics at all of what the incorrect (if any) piece of data is. So, before I make the request, I'd like to validate my request against the schema they have provided. Is this possible, and if so, how do I go about this? Thanks in advance

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  • VS2008 intellisense performance issue with large number of partial static classes

    - by scebula
    My question is a follow-up to the issue posted here regarding the Intellisense performance issue when building a large solution in VS2008 that has many partial static classes. Since Microsoft does not seem to be addressing the issue for VS2008, I would like to know if there are other ways around the problem? Waiting for VS2010 is not an option at this time. The proposed solution in the previous post is not practical as some of the partial classes may be regenerated and this would be a maintenance headache.

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