C# Corner

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  • Binary Search Using ArrayList Jan 10, 2000. The ArrayList class provide binary search algorithm and more...
  • C# IndexerJan 15, 2000. An indexer is a member that enables an object to be indexed in the same way as an array.
  • CSDownloadURL : Download Contents of a Web PageDec 03, 2000. CSDownloadURL is a class which has two functions - SetURL and DownloadURL. The set URL sets the current URL and GetDownload downloads the URL contents and returns its contents in a string.
  • Timer in C#Jan 26, 2001. An article with sample project explains how to work with the Timer control in C# and .NET to write to a text file after few seconds.
  • Implementing Delegates in C#Feb 04, 2001. The Zip file contains two projects. One is VB.Net and the other is C#. Each project is an example of the same use of a delegate. A base class is derived and the delegate calls a method on several classes derived from the base class.
  • Implementing Delegates in C# : Part 2Feb 13, 2001. This is second part of Timothy's Delegates in C# series...
  • Flames for FunMay 31, 2001. This is my second application using C#. In this Application I used GDI+.
  • Validation Contol in Mobile FormJun 04, 2001. In this article i'll be showing the power of Valiation Control which u can use with Mobile Application.There are total six Valiation Control as provided. Here i am showing four of them in this example and the rest two are Valiationsummary and CustomValidator.
  • Color GuideJun 11, 2001. This Program will generate all the colors that are supported in C# according to the Name.
  • Snooping on C#.NET Regular ExpressionsJun 26, 2001. I present here two micro test utils, which will let you play with regular expressions. Regular expression( System.Text.RegularExpressions.Regex ) is a powerful class very useful for parsing, splitting or replacing texts.
  • 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.
  • Get the Place Game in C#Aug 14, 2001. I have written a game in C# called Get the Place.
  • Calculator ExampleAug 14, 2001. Sample program shows you how to create a calculator.
  • Web Services between .NET, Java and MS SOAP Toolkit: Part 2Aug 24, 2001. This second article in this series dedicated to Web services comes as a sequel to the first one in which I started to tell you how you could build different kind of clients and services using MS SOAP Toolkit, Apache SOAP for Java and .NET Framework.
  • Web Service Between .NET, Java and MS SOAP Toolkit - Part IIAug 24, 2001. Second article in this series dedicated to Web services comes as a sequel to the first one in which I started to tell you how you could build different kind of clients and services using MS SOAP Toolkit, Apache SOAP for Java and .NET Framework.
  • A variety of Chart EnginesSep 07, 2001. The original code came from Scott Guthrie’s chart engine example. The differences from original code.
  • using Array Class and IEnumeration in C#Sep 14, 2001. This article illustrates the usage of Array class and IEnumerator. Array class Provides methods for creating, manipulating, searching and sorting arrays, thereby serving as the base class for all arrays in the common language runtime.
  • IComparable: Under the HoodSep 21, 2001. We now calling Array.Sort() on C# Types such as int, char, string will automatically do sorting based on that type.
  • A Simple Multi-threaded TCP/UDP Server and Client V2.Sep 24, 2001. This is the second version of my client/server program. The server and the client can be run on the same machine or on different machines. The following is the brief description of the server and the client programs specifically.
  • Method Parameters in C#Oct 15, 2001. This article describes different method parameters such as value parameters, reference parameters, output parameters, and parameter arrays.
  • Pointers in C#Oct 25, 2001. C# also supports pointers in a limited extent. A pointer is nothing but a variable that holds the memory address of another type. But in C# pointer can only be declared to hold the memory address of value types and arrays.
  • Implementing Stacks in C#Nov 06, 2001. With the help of C# we can also implement ADT (Abstract Data Types) with little effort. An example of ADT is a simple stack of integers.
  • Network Programming in C# - Part 2Nov 12, 2001. This is the second part of the series of articles about the network programming with C#.
  • Network Programming in C# - Part 1Nov 12, 2001. The .NET framework provides two namespaces, System.Net and System.Net.Sockets for network programming
  • Exceptions and Exception StackNov 16, 2001. The purpose of this tutorial is to explain firstly how you would go about creating your own set of exceptions to trap error conditions that could occur in your code or library, for your own benefit or for the benefit of another developer using your library. The second lesson is on how the C# exception stack works, and how you can use it to catch all types of exceptions.
  • Debug Troelsen's .NET books (1): IEnumeratorDec 10, 2001. This article examines code problem in chapter 4 (for C#)/chapter 5(for VB.Net) of the two .Net books.
  • Understanding the System.Buffer ClassDec 13, 2001. Before we try out something with Buffer class lets understand Buffer class and its Members.
  • Returning an Array Listing using Remote Procedure CallDec 26, 2001. In this article we will create a Web Service that will return an ArrayList of students.
  • Developing a Record Navigation Form with Unbound ControlsDec 26, 2001. Developing a record navigation form with unbound controls. The form enables you to navigate through the records one at a time. In this application we have used a combo box, two text boxes and various command buttons.
  • Overview of Automated TranscationsJan 04, 2002. Two or more .NET Framework objects can participate in the same transaction. One or more .NET Framework objects can participate in the same transaction as one or more COM+ objects. All objects must be hosted in Microsoft Windows 2K Component Services so as to receive services such as transaction processing.
  • Bridge Patterns in C# Jan 17, 2002. Bridge Pattern is commonly known as Handle/Body idiom in C++ community. This pattern is used for decoupling an abstraction from its implementation so that the two can vary independently.
  • Hangman Program Using C#Jan 19, 2002. Hangman was created to illustrate several features of C# including GDI+, string manipulation, array processing, using properties, as well as simple creation of objects.
  • Yahtzee Program Using C#: Part IIJan 31, 2002. This is an update of the Yahtzee program for VS 2005. Included in this version is a Game Reset and a High Score Tracker. The Top Ten High Scores are tracked using an Array with sortable components. In this article we will talk about the IComparable interface used to make an object stored in an array sortable.
  • C#RIS : Tetris Game in C#Feb 14, 2002. I have written a Tetris clone that demonstrates how to use off-screen graphics buffering for smooth animation and utilizes a multi-dimensional array approach to designing a game grid. The classes are largely self-explanatory and the techniques are documented in code well enough to explain what is going on.
  • JIT CodingMar 11, 2002. One not so well known feature of .NET platform is possibility to invoke compiler and practically create code and assembly from running instance of application. It is possible to do that in two ways. First one is a bit simpler and involves namespaces System.CodeDom and System.CodeDom.Compiler, second one is more efficient and utilizes namespace System.Reflection.Emit. Since there are very few examples about how to use System.CodeDom.Compiler I will start with it.
  • 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.
  • Sending Windows Message in C#Mar 14, 2002. This sample code shows how to send Window messages between two forms using C#.
  • Peer-to-peer Chat Program using Asynchronous SocketMar 22, 2002. This is a simple chat program, which uses asynchronous socket to provide connection between two machines.
  • Poorman's Installation program in C# and .NETApr 08, 2002. Installation programs can be quite expensive these days. Although programs such as Wise and InstallShield have fantastic features and are fairly comprehensive, sometimes you just want to do the easy installation of copying and pasting files into a directory and perhaps placing a shortcut in the start menu.
  • Outlook Bar ControlApr 18, 2002. This is a simple control similar to the OutlookBar. The attached zip file contains two Visual Studio .NET projects.
  • Drawing B-Spline CurvesApr 22, 2002. The attached source code project draws spline curves between two points.
  • A Database Component: Inserting Serializable ObjectsApr 23, 2002. The attached zip file contains two projects - a database component (DLL) project and a Windows forms project called Test. Both projects are written and compiled using Visual Studio .NET version 1.0.
  • Unit Conversion Tool for Pocket PC with Compact FrameworkMay 22, 2002. I have created a Unit conversion tool to calculate conversion from 16 different types.
  • An Editable GridView Control in C# and .NET - Part IIJun 19, 2002. In this article we will take advantage of the XML classes available to us to persist the GridView control that we talked about in our first article in this series. The two classes we utilize in our code are XmlTextWriter and XmlTextReader.
  • An Editable GridView Control in C# and .NET - Part II Persisting in XMLJun 19, 2002. In this article we will take advantage of the XML classes available to us to persist the GridView control that we talked about in our first article in this series. The two classes we utilize in our code are XmlTextWriter and XmlTextReader.
  • Redhotqlue C# ArrayObjectJun 20, 2002. Unlike Visual Basic the C# language does not provide a standard mechanism for re-dimensioning (resizing) arrays. This component provides that additional functionality for arrays created in C#.
  • Communication Between Two FormsJun 24, 2002. The aim of the program is to send a message between different forms.
  • Editable GridView Control in C# and .NET - Part-III Printing the GridViewJun 24, 2002. In our last two articles, we talked about how to create an editable GridView and how to make it persistent in XML.
  • Communication Between Two Forms: Part-IIJun 24, 2002. Last time I wrote about the possibility of sending a string from a textbox in one form to another.
  • Deploying a COM Component from C#Jul 08, 2002. Here is some code to help you to deploy a COM component from C#. I needed to programmatically deploy a project that would be registered as COM object (not COM+) and be installed into GAC. The following two classes will help in this objective.
  • Working with Arrays in C#Jul 09, 2002. This tutorial discusses array programming in C# and .NET. It starts with the discussion of simple arrays and then delves into more complex topics such as jagged and multi-dimensional arrays. In the end, it discusses the Array class and it's methods for searching and sorting an array's items.
  • Programming C#: Working with Arrays in .NETJul 09, 2002. This article concentrates on arrays in .NET and how you can work with arrays using C# language. Article also covers the Arrays class and its method, which can be used to sort, search, get, and set an array items.
  • A Virtual Photo Album in C# and .NETAug 05, 2002. This album allows you to drag your images directly from Windows Explorer into the spot you want your picture to occupy. You can also edit the captions by clicking on the labels under the pictures.
  • 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 Customiztion Part-III:Implementing Search Feature in a DataBound GridAug 21, 2002. In this article, I will show you how to exchange two DataGrid columns by dragging and dropping.
  • SMTP and POP3 Mail ServerSep 13, 2002. This is simple implementation of SMTP and POP3 server. Two new features are added to the original code.
  • Generating Maze using C# and .NETSep 25, 2002. This article focuses on how to generate a maze using the depth first search algorithm. This is a very simple but clever algorithm that creates a maze by randomly stripping one available wall between two cells for every cell in the grid.
  • Generating Maze using C# and .NETSep 25, 2002. Did you ever get the feeling that cubicles were laid out with the idea that there could be no escape? (Must be I am a bit overworked these days). Today's article focuses on how to generate a maze using the depth first search algorithm. This is a very simple but clever algorithm that creates a maze by randomly stripping one available wall between two cells for every cell in the grid.
  • Extracting Modules and Component(RSAParameter) from X509Certificate PublicKeyNov 04, 2002. In some applications, it might be necessary to extract the modulus and exponent from the X509Certificate PublicKey. The X509Certificate.GetPublicKey() returns a byte array that contains the ASN.1 Encoding information along with the modulus and exponent as described in the RFC2459.
  • Sorting using MultithreadingNov 13, 2002. This is simple multithreading application that sort integers values in an array.
  • Synchronized Threading in .NETDec 11, 2002. Threads are a powerful abstraction for allowing parallelized operations: graphical updates can happen while another thread is performing computations, two threads can handle two simultaneous network requests from a single process, and the list goes on. Since threads are pretty simple to understand, conceptually, but, practically, they are a cause for programmatic headaches, I decided to write this program to describe how to make use of threads.
  • Working with Portable Network Graphics(PNG) Format : Part IDec 13, 2002. First off, why use PNG instead of GIF? Probably the most important reason is that GIF supports a maximum of 256 colors.
  • Cryptography in Microsoft.NET Part II: Digital Envelop and Digital SignaturesDec 18, 2002. Part-I of this article covered cryptography in the context of encryption. This part continues from where part-I left. It assumes that the reader understands the purpose of encryption, knows about the two types of encryption namely asymmetric encryption and symmetric encryption and the fundamental differences between them. It also assumes that the reader understands encryption-decryption classes in System.Security.Cryptography namespace and the stream based encryption model in. NET framework class library (FCL).
  • ChessyOnline 1.0: An Online and Network Chess GameDec 31, 2002. The attached project is a chess game that can be played by two users online as well as on the network.
  • Cryptography in Microsoft.NET Part III: Digital CertificatesJan 08, 2003. Part-I and II of this article discussed the basics of cryptography and its applications in real world enterprise solutions. Part-I discussed the nitty-gritty of encryption and its implementation in Microsoft .NET Framework Class Library (FCL). Part-II discussed the hashing and signature algorithms and their implementation in FCL. It also discussed the two common cryptography applications namely digital envelope & digital signature.
  • Speedometer: Applying GDI+ TransformationsFeb 10, 2003. This zip file contains two folders - one folder contains speedometer control and the other contains the application that uses the control. Put both folders in the same location and open the application in VS and run it.
  • Iterations and Performance in .NETApr 15, 2003. I’ve been implementing numerical libraries in .NET and have come to some conclusions about iteration performance.
  • Part I: Simple Color Syntax Code Editor for PHP written in C# and .NETJun 18, 2003. The second part of this article shows how to print out the contents of a RichTextBox control.
  • Kuti.DataJul 02, 2003. The attached source code file has two parts - DataObject directory and Automatic SQL Generator.
  • Authentication and Authorization in ASP.NETSep 09, 2003. There are two closely interlinked concepts at the heart of security for distributed applications - authentication and authorization.
  • Understanding Crystal Report ViewersOct 07, 2003. Crystal Report Viewers work as a container of a report and allow us to view a crystal report in Windows and Web applications. Crystal Reports for Visual Studio .NET provides two report viewers – Windows Forms Viewer and Web Forms Viewer.
  • Deployment: Customizing your .NET deployment ProjectsDec 29, 2003. The fact of the matter is that Visual Studio.NET already contains everything you need to create a rich setup experience for your users. In this article we are going to show you two ways to add a readme dialog to your application, the easy way and the hard way. The easy way requires absolutely no coding. The hard way requires coding and actually allows you to add complex custom features to your application.
  • MyQueue in C#Jan 09, 2004. This article attempts to explain the how MSMQ can be implemented between two forms and the very basics of message queuing.
  • Directory Services Vs RDBMSFeb 06, 2004. When storing user information, developers can have two choices to choose from - Active directory and a relational database. This article sheds lights on usefulness of each of these and when to use one over the other and vice versa.
  • Oracle Data Provider for .NET : Part VIFeb 20, 2004. Oracle Data Provider for .NET (ODP.NET) is an implementation of a data provider for the Oracle database. ODP.NET uses Oracle native APIs to offer fast and reliable access to Oracle data and features from any .NET application.
  • New Features in C# 2.0 : Part 1Mar 08, 2004. In a two part series I will explain new features introduces in C# language version 2.0. In this article I will talk about generics.
  • The Matrix Class and TransformationsApr 01, 2004. Matrices play a vital role in the transformation process. In GDI+, the Matrix class represents a 3×2 matrix that contains x, y, and w values in the first, second, and third columns, respectively.
  • Populate SQL Servers and Databases dynamically in C#May 27, 2004. The attached source code is a class that provides methods to populate an array with the available SQL Server and databases on your network dynamically.
  • Working with Tablet PC InkEdit Control in C#Jun 02, 2004. Tablet PC SDK provides two very powerful but easy to use Ink controls for Ink recognition. These two controls are - InkEdit and InkPicture. This article discusses how to work with InkEdit and InkPicture controls.
  • Working with Tablet PC InkPicture Control in C#Jun 24, 2004. Tablet PC SDK provides two very powerful but easy to use Ink controls for Ink recognition. These two controls are - InkEdit and InkPicture. This article discusses how to work with InkPicture control. See Working with Tablet PC InkEdit control to work with InkEdit control.
  • Validating Input Xml Data FilesJun 28, 2004. In this article we'll discus two strategies for validating input XML data files. The validation of an XML input file could occur at various instances of processing.
  • Avoid Memory Leaks with Destructor and DisposeJul 01, 2004. Here are two classes that allocate resources, the first class needs to implement a custom destructor and standard Dispose, but the second class doesn't need either.
  • Simple Messenger in C# and .NETJul 16, 2004. This is a simple messenger application developed in .NET using C#. The attached project has two applications - a server and a client.
  • Adding Discovery Features to BizTalk Server 2004: Part ISep 13, 2004. This article explores the concepts of the BizTalk-UDDI mapping process and the similarity with the WSDL-UDDI mapping process. By the other way the second article is focused in the implementation and use of the BizTalk Server 2004 UDDI Publishing Wizard tool.
  • An in-depth look at WMI and Instrumentation: Part IISep 18, 2004. In this second part of the series, you will learn how to work with WMI classes and class instances, and then demonstrates the wealth of information available through the Win32 and IIS WMI providers.
  • Storing Images into a DatabaseOct 18, 2004. In order to provide your application with cool pictures you can employ two techniques (at least). One of them is that you can save the pictures in a folder and store the path to each one in a database or configuration file. The other one is to store the entire file into a database, along with its file name.
  • How to Populate a DropDownList insides a DataGrid through an XML FileNov 16, 2004. In this article, we will show how to fill a DropDownList inside a DataGrid through an XML file. We will also show how the contents of one DropDownList changes dynamically as we change the index of second DropDownList (both inside the grid).
  • A Chess Program using C#Nov 29, 2004. This is a chess program, made using C#. It has used object oriented concepts and design patterns like Flyweight, Factory and Decorator. Two player can play this game and it has facility to drag-drop pieces. It also shows potential positions of each pieces which is useful for learning.
  • Talk to SharePoint through its web servicesDec 09, 2004. Microsoft Office 2003 is very tightly integrated with SharePoint by utilizing its web services. Windows SharePoint Services comes with sixteen different web services. SharePoint Portal Server 2003 supports an additional five web services. The web services provided by SharePoint do provide a vast array of features.
  • Generating Random Number in the ArrayDec 17, 2004. This article shows how to generate random number in an array using C#.
  • How Count Sort worksJan 15, 2005. Count Sort is Linear Sorting algorithm which sorts elements in O(n) time , the other linear sorts include Bucket and Radix sorts.
  • Will swap work if C# Manipulates Objects by Reference?Feb 15, 2005. C# does manipulate objects by reference, and all object variables are references. On the other hand, C# does not pass method arguments by reference; it passes them by value. Thus, a regular swap method will not work!
  • OOPS Concepts And .NET Part 2: Inheritance, Abstraction And PolymorphismJun 22, 2005. The following article is the second of a three-part article series that presents definitions and samples for different Object-Oriented Programming (OOP) concepts and its implementation in .NET
  • OOPs Concepts and .NET Part 1: Classes, Objects, and StructuresJun 22, 2005. The following article kicks off a three-part article series that will present definitions and samples for different Object-Oriented Programming concepts and its implementation in .NET. The first part will examine the concepts of classes, objects, and structures. The second part will examine the concepts of inheritance, abstraction, and polymorphism. The third and last part will examine the concepts of interface, multiple interface inheritance, collections, and overloading.
  • OOPS Concepts and .NET Part 2: Inheritance, Abstraction, & PolymorphismJun 22, 2005. The following article is the second of a three-part article series that presents definitions and samples for different Object-Oriented Programming (OOP) concepts and its implementation in .NET. The first part examined the concepts of classes, objects, and structures. This part examines the concepts of inheritance, abstraction, and polymorphism. The third and last part will examine the concepts of interface, multiple interface inheritance, collections, and overloading.
  • Convert a Comma Delimited String to an Array in C#Aug 01, 2005. This article shows how to convert an array to a comma delimited string in C#.
  • Get difference between two dates in C#Aug 05, 2005. This code snippet shows how to get difference between two dates in C#.
  • Programming with .NET Compact Framework 1.0 and SQL CE 2.0 : Part IIAug 11, 2005. In this article I am going to talk about garbage collection and JIT process in .NET compact framework and what are the differences between these two model of framework.
  • Globalization and Localization in .NET: Part IOct 01, 2005. In this first part of this two parts series, we will get started with globalization and localization in .NET.
  • How do I use Memory Stream in C# Oct 27, 2005. This article shows how to use memory stream to read byte[] array and can use to write some file in memory.

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