C# Corner

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  • Generate Unique Number in C#Jan 09, 2000. Generate a unique number using random class and display it on the console.
  • C# Installation and CompilationSep 29, 2000. This article explains what you need to install on your machine to run C# and where to find the downloads.
  • Complex Numbers ClassMar 20, 2001. This small example demonstrates using some of the interesting language elements of the C# language.
  • Windows Calculator in C#Mar 27, 2001. This is a simple Calculator application as you will find in a Windows accessories.
  • Assemblies : The Ins and Out : Part IApr 13, 2001. In Part 1, I will cover what exactly an assembly is, and what an assembly contains.
  • Assemblies : The Ins and Out : Part IIApr 16, 2001. In this part, I will discuss both Private and Shared assemblies and how to create a "Shared Assembly".
  • Assemblies : The Ins and Out : Part IIIApr 20, 2001. In this part I will discuss in more detail than Part 2, the available utilities for manipulating assemblies.
  • Find Files in C#May 01, 2001. I have developed a small application in c#, which helps in searching u'r hard disk for files of the desired extention.
  • Line Numbering Utility in C# and JavaMay 08, 2001. This is the first of the series of programs I wish to write to help myself get a handle on C#.
  • Line numbering utility in C# and JavaMay 08, 2001. After reading this article Java programmers should be able to decipher and de-jargonize the .NET architecture and relate it with the proposed ECMA standard.
  • Serializing Objects in C#May 14, 2001. In simple words serialization is a process of storing the object instance to a disk file. Serialization stores state of the object i.e. member variable values to disk. Deserialization is reverse of serialization.
  • strnicmp equivalent in C#Aug 07, 2001. C# equivalent strnicmp function in C language. It accepts two input strings along with the number of positions of chars to compare.
  • Basic Database operations using ADO.NETAug 21, 2001. I found very interesting database features incorporated into the .NET as ADO.NET.
  • Displaying Exception InformationAug 21, 2001. This is a simple utility to display exceptions. Each exception in the chain is added to an ArrayList and displayed in reverse order in a ListView control.
  • Web Services between .NET, Java and MS SOAP Toolkit: Part IAug 24, 2001. WinGhost 2.0 application allows you to show and hide applications running on your machine. I find this program useful at my work as I do lot of programming at any given time I can have a bunch windows open. I use it normally to hide just my windows I don't access that often.
  • Modest Introduction to IL Assembly LanguageSep 03, 2001. Since I received copy of Visual Studio .NET Beta 2 and did not manage to find “ILAssemblyLanguageProgrammersReference.doc” which was included in beta 1 I decided to share my experience with other assembly enthusiasts.
  • Simple Game Developed in C#Sep 03, 2001. This article contains the code for a simple game developed using csharp. This game is all about arranging the shuffled numbers in ascending order.
  • Number to Currency ConvertorSep 03, 2001. The attached Num2Cur.cs file converts number to currency up to 999,999,999,999.9999 i.e (999 billion).
  • String Jargon in C#Sep 05, 2001. The following article shows some String functions which are not currently available directly in C#.
  • Constructor, Destructor and ILASMSep 20, 2001. I find C# a very interesting language and it also comes handy to analyze ILASM code.
  • Understanding Structures in C#Oct 23, 2001. A structure in C# is simply a composite data type consisting of a number elements of other types.
  • BitWise Operations in C#Nov 01, 2001. C# has lots of flexibility over manipulating with bits. Before I start explaining about bit wise manipulation I would like to give some inputs on binary operations.
  • Debugging "Rubber Band Effect"Nov 06, 2001. Bug fixes for Rubber Band Effect in a form by Simon Bond demonstrated a small but useful rubber band effect application. If you play with the application for a while, however, you may find one major problem with it.
  • World Clock Using Windows FormsFeb 11, 2002. I developed a C# application for finding World Timings given the US Central Timing.
  • Marble Solitaire Solution Display in GDI+Feb 13, 2002. The application finds and displays solutions to a game of solitaire. The application was written using Visual Studio.NET Version 7.0.9254. The test suite was written using NUnit, which is a .NET port of JUnit.
  • Musical Teacher Web ServiceMar 04, 2002. A number of people / organizations have developed web services that are available for free to use.
  • Multi-threaded Web Applications - Case I: Search EngineMar 07, 2002. This article is the first of the series of 4. I will demonstrate the use of threading in web applications by implementing a simply search engine. The following 3 articles in the series will be a Port Scanner, a Reverse DNS and a Web Hammer respectively.
  • A Shaped Windows Forms Application with Variable OpacityMar 11, 2002. This application demonstrates two simple techniques that beginners might find useful in developing creative new looks for Windows applications.
  • Tutorial: Capturing and Running IE Instances in a Windows controlMar 15, 2002. In this article we are going to study how to find the running instances of Internet Explorer on your machine.
  • BattleShips GamesApr 02, 2002. This application presents a grid of 100 squares to the user. The user has thirty five attempts to find to find the computers fleet. The computer randomly positions five ships of varying sizes around the board.
  • Exocortex.DSP - A C# Complex Number and FFT LibraryApr 08, 2002. Shows how to convert an image from a spatial representation (i.e. picture on the left) to a frequency representation (picture on the right) using a 2D fast Fourier transform.
  • Multithreading Part 3: Thread SynchronizationApr 11, 2002. The .NET framework provides a number of classes and data types that you can use to control the access to shared resources. Thread synchronization refers to the act of shielding against multithreading issues such as data- races, deadlocks and starvation.
  • Gene Expression Programming (GEP) in C# and .NETApr 11, 2002. Gene Expression programming (GEP) is a subset of Genetic Algorithms, except it uses genomes whose strings of numbers represent symbols. The string of symbols can further represent equations, grammars, or logical mappings.
  • Performance Comparison of XslTransform InputsMay 02, 2002. To transform XML into HTML for use on a Web site or to transform it into a document that contains only the fields required you could use the XSLTransform class (found in the System.Xml.Xsl namespace).
  • Performance Comparison of XslTransform InputsMay 02, 2002. To transform XML into HTML for use on a Web site or to transform it into a document that contains only the fields required you could use the XSLTransform class (found in the System.Xml.Xsl namespace).
  • DataGrid Customization: Part-1Jun 25, 2002. In this article, I will discuss some DataGrid customization tips such as how to I get the name and index of the column headers and how do I find out if mouse click right click was on a column.
  • Evaluating Neper's Numbers in C#Jul 22, 2002. One of the most interesting number in mathematics is the Neper's number : "e".
  • Validation Server Controls in Web FormsAug 05, 2002. When working with Web applications, developers need to write two separate codes using Java Script and VB Script to validate user inputs.In this article we are going to see, how we can reduce the programmers effort on coding, reducing the execution process time and simplify the code handling and less number of lines in the coding.
  • DataGrid Customization Part-II: Custom Sorting and DataGrid Column HidingAug 13, 2002. How to I get the name and index of the Column headers? How do I find out if mouse click right click was on a column
  • Working with COBOL Data Groups in C#Sep 11, 2002. In this article we will begin with a C# console application calling a COBOL DLL file. The C# application will pass it a number of occurrences to create in the table (much like a user requesting a specific number of months to report on).
  • More AI...(GEP) Gene Expression Programming in C# and .NETNov 04, 2002. Gene Expression programming (GEP) is a subset of Genetic Algorithms, except it uses genomes whose strings of numbers represent symbols.
  • Consumer/Producer Multithreaded ProgramNov 04, 2002. This is simple multi-threading program that adds and removes elements in an ArrayList. Producer button will creates a producer thread that adds elements in to the ArrayList. The maximum number of elements can be added to this ArrayList are 100 elements and the producer thread has to wait until the consumer thread/threads (creates by pressing consumer button) removes elements from the ArrayList. Then Producer thread starts to add more elements to the ArrayList.
  • The "ins" and "outs" of Using Stored Procedures in C#Jan 27, 2003. This article reviews the creation of stored procedures with parameters using the Visual Studio IDE.
  • Telnet Scripting in C#Jan 28, 2003. This library, written in C#, expands on some telnet code from various other sources, presenting the caller with a number of functions handy for scripting telnet sessions (i.e. SendMessage, SendAndWait, WaitAndSend, WaitFor).
  • ShootDraw: Managed DirectX Application WizardMar 10, 2003. The Managed DirectX Application Wizard has created this "ShootDDraw" project for you as a starting point.This file contains a summary of what you will find in each of the files that make up your project.
  • Making Thumbnails of Transparent Images in .NET and C#Mar 28, 2003. When I started writing web applications using .NET, I found myself in need to dynamically create thumbnails of images that could be uploaded by the user or pulled from a database.
  • Mersenne Twister Random Number GeneratorApr 01, 2003. The attached source code is the C# implementation of the Mersenne Twister algorithm, developed by Makoto Matsumoto and Takuji Nishimura in 1996-1997.
  • Basics of Extending Your Working Environment in Visual StudioApr 10, 2003. All of us have used Macros in Microsoft Office and Add-ins in Visual Studio 6 and I am very sure all of us have been impressed as well by their power to control their own working environment.
  • FTP Client Library for C#Apr 26, 2003. Finding a fully working, lightweight FTP Client that had no GUI, was free, and came with source was difficult.
  • Lengthy Operations on Single Thread in .NET ApplicationsJul 08, 2003. In this article I discuss how the lenghty operations can be handled in a .NET application. I also discuss how the stack trace can be examined to find any specific methods.
  • SMTP InternationalizationJul 16, 2003. You can find many articles dedicated to C# SMTP implementation on this or other sites.
  • Handling Null Values in DataGridJul 17, 2003. This article shows you how to handle no data found or null values in an ASP.NET DataGrid control.
  • User Controls in Internet ExplorerAug 13, 2003. WinGhost 2.0 application allows you to show and hide applications running on your machine. I find this program useful at my work as I do lot of programming at any given time I can have a bunch windows open. I use it normally to hide just my windows I don't access that often.
  • Interlocking ThreadsSep 10, 2003. Recently, I was building multi-threaded applications and noticed some intermittent data inconsistency. Soon, I found the culprit was locking mechanism. After doing some research, I gathered the following information and as usual decide to share with you guys.
  • Creating Word Find Pzzules in C# and GDI+Sep 30, 2003. Perusing the newsstands in New York you'll find newspapers, TV-Guides, magazines, and even books. In the magazine section you'll often find crosswords and books containing the puzzles you'll see in figure 1. The books contain pages and pages of puzzles with hidden words contained in the matrix of letters in which you can spend time going blind trying to find.
  • Creating Word Find Pzzules in C# and GDI+Sep 30, 2003. In the past I have been guilty of trying a few of word find puzzles myself, so I figured why not give it a go it .NET. The Word Find creator reads a MSDE database of Words and Categories.
  • Creating Word Find Puzzles for the Web in C# and GDI+ Part IIOct 06, 2003. In our last article we showed you how to create Word Find Puzzles inside of a Windows Form. This article will show you the migration process of bringing it over to an ASP.NET application.
  • Creating Word Find Puzzles for the Web in C# and GDI+ Part IIOct 06, 2003. This article shows you how to create Word Find Puzzle application for the Web using C#, GDI+, and ASP.NET.
  • In Depth ASP.NET using ADO.NET: Part IIINov 18, 2003. In this article we will discuss a number of ways to retrieve, show, and update data with ASP.NET forms using ADO.NET. Also, we will have a clear idea about the most common server controls in ASP.NET.
  • In Depth ASP.NET using ADO.NET: Part VNov 18, 2003. In this tutorial we will discuss a number of ways to retrieve, show, and update data with ASP.NET forms using ADO.NET. Also, we will have a clear idea about the most common server controls in ASP.NET.
  • In Depth ASP.NET using ADO.NET: Part IINov 18, 2003. In this article we will discuss a number of ways to retrieve, show, and update data with ASP.NET forms using ADO.NET. Also, we will have a clear idea about the most common server controls in ASP.NET.
  • In Depth ASP.NET using ADO.NET: Part IVNov 18, 2003. In this tutorial we will discuss a number of ways to retrieve, show, and update data with ASP.NET forms using ADO.NET. Also, we will have a clear idea about the most common server controls in ASP.NET.
  • Directory Picker Pro in C#Nov 24, 2003. In my latest project I needed a dialog for picking a directory. I searched through the web, but found nothing that looked nice. First of all I wanted a TreeView for display, and I wanted to view all system drives (with correct names and icons).
  • QuickModeler 2.0 : A Reverse Engineering Tool for Visual Studio .NETJan 08, 2004. QuickModeler is an Add-In for Visual Studio .NET which provides reverse engineering and easy UML modeling functionality to the development environment. It comprises features like autolayout, inheritance and association modeling, cross language modeling, grid, clipboard, etc.
  • Masked TextBox ControlJan 26, 2004. This Masked Edit TextBox intelligent user control enhances the function of TextBox control, which can mask the Date, IP Address, SSN, Phone number, digit, decimal and check the validation, automatically set delimit location.
  • Configuring Publisher Policy FileFeb 20, 2004. Versioning in the Microsoft .NET Framework is managed at the assembly level and is only used when locating strong-named assemblies. By default, the common language runtime loads the assembly whose entire version number matches the version number in the calling assembly's metadata.
  • Combine Multiple Streams in a Single .NET Framework Stream ObjectApr 11, 2004. This article represents a simple Stream class whose data is based on the number of another .NET Framework streams.
  • Evolving Register Network using Genetic Algorithms in C# Jun 23, 2004. Genetic Algorithms are powerful AI tools because they can evolve through trial and error and converge into a solution. In this article we will use genetic algorithms to come up with an analog solution.
  • Evolving Numeric Series using Genetic Algorithms in C#Jul 27, 2004. If you ever browsed around the book store, you'll notice these puzzle books or IQ test books and some of the books contain questions asking you to complete a series of numbers.
  • Remote Data Access LayerAug 24, 2004. The attached source project is a data access layer library and the main idea of developing such a DAL is to separate the database execution from the client/end user and maintain it on the server side, there by reducing the number of direct simultaneous connection to the SQL Server.
  • Writing unsafe code - pointers in C#Oct 13, 2004. In this article I will give a short description of one of the feature of C# which are pointers and so-called unsafe code. This subject is particularly close for C++ programmers. Moreover, it is a feature that we do not find in Java.
  • Generating Random Number and String in C#Nov 19, 2004. The Random class defined in the .NET Framework class library provides functionality to generate random numbers. This article shows you how you can use this class to generate random numbers and strings and even combination of both.
  • Generating Random Number in the ArrayDec 17, 2004. This article shows how to generate random number in an array using C#.
  • ClickMania GameDec 21, 2004. This is an old game, first implemented in 1996 or so... It has a great addictive power. You will quickly find out the rules. I used the winmm.dll library for playing sounds, the picturebox.Paint event to draw bitmaps in a Picturebox and a recursive function to check the balls next to each other for the colors.
  • Stack in C#Feb 22, 2005. Stacks are one of the common data structures used in the software world, which follows the First In Last Out paradigm. Stacks are used in various mathematical functions like Towers of Hanoi, finding Fibonacci Sequence , Factorial of a number to name a few.
  • Floating-Point in .NET Part I: Concepts and FormatsApr 18, 2005. The first in a three part series, this article introduces the basic concepts of floating-point arithmetic: number formats, accuracy and precision, and round-off error.
  • Active Directory and .NETJun 22, 2005. Microsoft Technet offers a script repository to work with AD User Accounts; however, I needed to work with .NET and I could not find samples for all the tasks I needed to program. I promised to myself that one day I would publish the code samples I found and created to help other developers who are working with Directory Services.
  • Custom Error Handling Using ASP.NETJul 07, 2005. Sometimes in your application, you may want to show some decent error messages other than red error messages and some message when page is not found or server is busy. We will see custom error message handling mechanism in this article using ASP.NET.
  • POC for DOM XML ParserJul 21, 2005. The classes found in System.Xml namespace provide functionality to parse and navigate through XML documents. The attached source code shows how to use this functionality in C#.
  • NotePad.NET II - Find and Replace Inside a Document Using Regular ExpressionsSep 04, 2005. This article is a continuation of the discussion about a notepad.net editor which improves upon the current functionality in notepad. In this article we talk about regular expression matching inside the find dialog.
  • How do I Generate Random Number in C#?Oct 05, 2005. This code snippet shows how to you generate a random number between a range in C#.
  • AI: Using the Compact Genetic Algorithm to Compute Square Roots in C#Oct 09, 2005. This article describes the Compact Genetic Algorithm (cGA) and how it can be used to calculate the square root of a floating point number.
  • Windows Forms 2.0 MaskedTextBox ControlNov 10, 2005. The MaskedTextBox control is a TextBox with mask feature, which allows you to set the format of the data of TextBox such as zip code, date, time, social security, and phone number.
  • Numeric TextBox for ASP.NETDec 06, 2005. An article on how to allow users to enter only numbers in a TextBox.
  • Generic 'T, K' Database ComponentDec 17, 2005. I have written a C# 2.0 (Visual Studio 2005), Generic <T, K> Database component, The component has simplified the architecture and the implementation by allowing me to keep the number of overloaded methods to a minimum.
  • AJAX Pager controlFeb 01, 2006. After AJAX Repeater control next logical thing was to try and create paging control, a control which renders paging links when you set its properties like page count and page number, I have been using similar control in asp.net page so I decided to implement same thing with JavaScript.
  • Counting Words in C#Feb 14, 2006. This article shows a function that returns number of words rather than number of characters.
  • Solving Polynomial Equations with Complex Roots using Genetic Algorithms in C#Apr 09, 2006. This article features a program in which the user can enter a polynomial equation and it will use GAs to determine the complex roots.
  • Data mining and SQL Server 2005Apr 11, 2006. Data mining is a key member in the Business Intelligence (BI) product family in SQL Server 2005 . Data mining is about analyzing data and finding hidden patterns using automatic or semiautomatic means, which can be explored for valuable information. It is about learning the characteristics of data set, which are not possible to discover by simple seeing.
  • Merging data into single table from multiple tables (resultsets)May 15, 2006. This article shows how to reduce the number of trips to improve performance by merging data into single table from multiple tables (resultsets).
  • Regular ExpressionsJul 05, 2006. The purpose of this article is to build upon the existing pool of regular expression articles by providing an overview of the new regular expression features found in .NET and to offer some guidelines as to when and how to use them.
  • Random isn't Really Random -- C# Random Number GenerationJul 18, 2006. This article covers overriding the System.Random object in order to produce better random numbers. The project file contains a library of eight commonly used random number generating algorithms, the best of which is the Mersenne Twister algorithm.
  • Generating a Report from Multiple Data Sources in Crystal ReportsOct 23, 2006. If you have to create a report in Crystal Reports from multiple data sources or provide multiple views of the data, you may find sticky situations because CR does not allow you to have multiple Detail sections in a single report.
  • Crystal report with Dynamic ColumnNov 03, 2006. The objective of this article is to provide a process which can be followed to develop a crystal report with dynamic columns using parameterized column fields and formula fields. Before going for this the developer has to decide the maximum number of columns he/she has to display and as per the no. of columns the size of the paper. The developer can define the size of the paper by selecting Printer Setup in File menu.
  • A guide to ObjectDataSource controlNov 17, 2006. One of the best new features of the forthcoming ASP.NET 2.0 will be the ObjectDataSource control. However, as I found out in my experimentation what seems like a simple control has some complex behaviours to master to get it working properly. If (like me) you have an existing data access layer you may have to make changes to be able to use ObjectDataSource.
  • Tip related to sub containers and SqlDataSourceDec 06, 2006. This article provides some tips when working With Master page or SqlDataSource insert function In VS 2005.
  • How to use Genetic Algorithm for Traveling Salesman ProblemDec 20, 2006. TSP is a famous math problem: Given a number of cities and the costs of traveling from any city to any other city, what is the cheapest round-trip route that visits each city exactly once and then returns to the starting city? We use the Genetic Algorithm to solve the TSP problem as a C# programing example .
  • Find and Replace for Multiline TextDec 26, 2006. This article explains how would you find and replace a multiline text.
  • Restricting User InputDec 28, 2006. This article describes an approach to restricting the user’s input to letters only, numbers only, letters or numbers only, and special characters only. The approach is simple to implement and can be used whenever it is necessary to restrict a user’s response to instances where it is necessary to capture information from the user into a form’s text box control.
  • How to Bring up a Find Dialog in the WebBrowser Control using Managed C++Feb 07, 2007. This article will answers the question, "how do I bring up a find dialog in the Web Browser Control?". As easy as you would think this should be, it actually requires some COMplicated manipulation.

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