C# Corner

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  • How to read a value from Console?Oct 07, 2000. This article explains how to get the input from the console using ReadLine.
  • Boxing and UnboxingFeb 21, 2001. Boxing and Unboxing are fairly new terms introduced in C#. Author explains some concept of them.
  • Using the out ParameterMar 07, 2001. Did you ever need your method return more than one value? The out keyword can be used to do the same.
  • 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.
  • Properties in C#: New Cover on old book Jun 06, 2001. Properties are accessor methods whose job is to retrieve and set the values of fields.
  • The out and ref Paramerter in C#Jun 12, 2001. The out and the ref parameters are used to return values in the same variables, that you pass an an argument of a method. These both parameters are very useful when your method needs to return more than one values.
  • What & Why : Properties :: Part 2Jul 09, 2001. In the part 1 of this series, I discussed about the get method of the properties, with the help of which you can make your variable so that nobody can modify the value of the variable.
  • Text Reader and Text Writer in C#Aug 03, 2001. A detailed tutorial and C# types such as Value and Reference types with sample examples.
  • NumberBox ASP.NET ControlAug 08, 2001. The NumberBox control is an ASP.NET control, which lets the user only input numerical values.
  • Boxing and Unboxing in C#Aug 20, 2001. Boxing and unboxing is a essential concept in C#'s type system. With Boxing and unboxing one can link between value-types and reference-types by allowing any value of a value-type to be converted to and from type object.
  • Validation Controls in Web Forms: Part IAug 24, 2001. Validation is one of the less talked about areas – often taken for granted.
  • Is there any need to Boxing and UnboxingSep 21, 2001. With Boxing and unboxing one can link between value-types and reference-types by allowing any value of a value-type to be converted to and from type object. Boxing and unboxing enables a unified view of the type system wherein a value of any type can ultimately be treated as an object.
  • 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.
  • Enumerators in C#Oct 25, 2001. An enumeration (enum) is a special form of value type, which inherits from System.Enum and supplies alternate names for the values of an underlying primitive type.
  • Charting in GDI+Nov 07, 2001. Here is an example of creating simple charts using GDI+ commands in C#. I have used the random class to create 5 random percentage values. I then use GDI+ to plot these values on a chart.
  • Working With Data TypesJan 02, 2002. Explains data types in C# and how to work with them.
  • Boxing and Performance of CollectionsMar 14, 2002. In this article, I will compare some performance issues of values and references types during boxing and unboxing operations.
  • Globalized Property GridApr 17, 2002. The property grid is a nice control to display properties and values. You create an instance of your class and assign it to the property grid. By using reflection a property grid extracts the properties of the class and displays its values.
  • Sorting MultiColumn ListView Windows Forms ControlMay 20, 2002. If you want to sort on the first column of a ListView, simply click the Sorting in the properties Window and choose Ascending or Descending as a value. If you want to do sorting in all the columns of a ListView, you need to write custom sorting using the ListViewItemSorter property.
  • Comparison of C# with Java: A Developer PerspectiveMay 29, 2002. The .NET is a language and operating system (on Windows as of now) independent platform pretty similar to Java.
  • Hex Colors in C#Sep 05, 2002. Currently I am developing a shareware application for generating image galleries for the web. There is a template engine built in that allows the user to specify colors as hexadecimal values, plus many other features.
  • Sorting using MultithreadingNov 13, 2002. This is simple multithreading application that sort integers values in an array.
  • Developing Secure Web Site with ASP.NET and IIS: PartIIMay 07, 2003. Authentication is a very important element of developing secure sites. It is the starting point of a secure environment for the protected resources. I have discussed several authentication mechanisms available in ASP.NET and how they join with IIS to provide a secure platform to develop sites in Part I of this article. I will be looking at Form Authentication and how to implement it in several sample web applications.
  • Dynamically Setting Properties of a Class from a DatabaseMay 12, 2003. This example demonstrates a powerful feature of Reflection that will allow you to dynamically set the values of a class.
  • Change Color of a Column Based on Column ValuesMay 15, 2003. In this article we'll see how to change the color of column based on the column value.
  • DataGrid and CheckBox ControlsJun 17, 2003. How to have checkbox that is checked or unchecked depending on a field value stored in the Database, and then allow the user to click on it and record the new checkbox state in the database.
  • C# Methods : Part II Jul 07, 2003. This article completes our discussion of methods. In this article, you will learn parameter passing, reference and value type parameters, and method overloading.
  • Format DateTime Values in XML Extracted From DataSet Jul 17, 2003. In this article we'll see how to specify the format of DateTime values extracted from the ADO.NET DataSet and to verify we will write formatted contents in xml file.
  • 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.
  • Boxing and Unboxing of Value Types : What You Need to Know?Jul 21, 2003. Programmers new to C# can encounter less than ideal performance and even unexpected results due to boxing and unboxing of value types.
  • Deleting a DataGrid Data Based on a Column ValueJul 24, 2003. In this article we'll see how to delete the records of a DataGrid based on a column value in the database table.
  • C# MethodsAug 05, 2003. This article explains hot to define and use methods in C#.
  • EggTimer in C#Aug 26, 2003. This simple timer app will count down from whatever value is set in the textbox.
  • Enter Null Values for DateTime Column of SQL ServerSep 26, 2003. Inserting a null value to the DateTime Field in SQL Server is one of the most common issues giving various errors. Even if one enters null values the value in the database is some default value as 1/1/1900 12:00:00 AM.
  • Display Alphabetically Sorted Data in a Data GridDec 24, 2003. This code sample shows you how to display data sorted alphabetically based on the values in the database.
  • Real Life SQL and .NET: Part VIJan 13, 2004. Welcome to the world of SQL and the huge, growing database technologies of today’s business all over the SQL world. By reading this article, we have begun accepting the knowledge that will soon be required for survival in today’s world of relational database and data management. Alas, for the reason that it is first necessary to provide a background of SQL and cover some preliminary concepts that we need to know, the majority of this article is text in paragraph format.
  • Debugging a Compiled ComponentFeb 02, 2004. After an assembly is compiled into a dll in a release mode, it is very difficult to gather information from it such as runtime performance, parameters values, etc.
  • DataSet in C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • Data Binding in DataGrid Control using C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • DataTable in C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • DataReader in C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • DataAdapter in C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • DataView in C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • DataTable Events in C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • Constructing a DataTable using C#Feb 17, 2004. The ADO.NET DataSet is a data construct that can contain several relational rowsets, the relations that link those rowsets, and the metadata for each rowset. The DataSet also tracks which fields have changed, their new values and their original values, and can store custom information in its Extended Properties collection. The DataSet can be exported to XML or created from an XML document, thus enabling increased interoperability between applications.
  • Extreme Programming (XP)Feb 18, 2004. Extreme Programming (XP) is a discipline of software development based on values of simplicity, communication & feedback. It works by bringing the whole team together in the presence of simple practices.
  • An introduction to Matisse, a post-relational database for .NET - Part 1Mar 06, 2004. When it comes to database for .NET, there are several options in addition to the well known ones such as SQL Server or MySQL. One of them is Matisse, a post-relational database by Matisse Software.
  • 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.
  • Normal Distribution Implementation in C#Apr 13, 2004. The attached source code is a C# normal distribution class. The probability density function (PDF) and cumulative distribution function (CDF) can be computed for a given x-value.
  • Setting Ink Overlay Properties in Tablet PCJun 02, 2004. In this article, I will write an application that allows us to set the Ink Overlay properties dynamically based on the values selected by the user.
  • Difference between passing reference types by ref and by valueSep 02, 2004. We all know the difference between passing value types byval and byref, if the variable is passed byval any change to the variable value in the called function is not reflected back in the callee.
  • Passing Values between User Controls and ASPX PageJan 20, 2005. This article is for beginners who are learning. NET. This will be really helpful for them. Beginners will be wondered how to pass values between User Controls and ASPX page .In this article I have listed some of the ways through which you can access and set the User control values in an ASPX page.
  • 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!
  • Digging Deeper - Structures in C# Feb 22, 2005. Structures in C# are similar to structures in C and C++ but with several prominent differences. In C#, structures are value types.
  • Out and Ref Parameters in C#Feb 27, 2005. The out and the ref parameters are used to return values in the same variables that you pass an an argument of a method.
  • Mapping Microsoft Excel columns with XML data (XML data integration) programmatically using a .Net Application.Apr 21, 2005. Using this program you can map Excel columns programmatically and generate an XML file containing the cell values that you had in your Excel document. After generating the XML file we can read it into a dataset.
  • How to Maintain a CodeGroup in Security Policy at Runtime?Jul 05, 2005. Whenever protected resources are accessed by an assembly, it’s permissions are determined by the code access security system of CLR. Each permission set granted to an assembly is based on the assembly's evidence (such as its URL or publisher certificate, strong name), which in turn is based on configurable security policy.
  • Creating a Dynamic Configuration Dialog in C# and .NETJul 10, 2005. This article will show you how to create a configuration dialog that builds itself from the existing application configuration name-value pairs contained in the appSettings of the app.config file.
  • C# 2.0 Feature: Nullable TypesAug 28, 2005. C# 2.0 allows you to assign null values to primitive types including boolean and integer, which wasn't possible in previous version of C#.
  • How do I Convert a String to an Enum Value?Sep 10, 2005. In this How do I, you will learn how to convert a string to an enum value in C#.
  • ASP.NET Session StateSep 21, 2005. Session state is nothing more than memory in the shape of a dictionary or hash table, e.g. key-value pairs, which can be set and read for the duration of a user's session.
  • Convert an Enum to a StringOct 24, 2005. This article shows how to convert an enum value to a string value.
  • Hashtable in C#Nov 14, 2005. Hashtable is useful when you need to store data in a key and value pair. This article shows how to use hashtable in C#.
  • ColorReliefButtonDec 14, 2005. My idea was to create a button that can be used as a colourful decoration for any application. The look of the ColorReliefButton can be determined by changing property values. The main attraction should be a cool look (Relief) of the controls text. Like this almost any font (TrueTyp) can be used to decorate a button and there is no need to use bitmaps.
  • How to Select all Checkbox when Header Checkbox is SelectedDec 30, 2005. Here I have provided the code using javascript to check/uncheck all checkboxes when header checkbox is checked. I recommend JAVA Script because its executed at client side and saves request Round-Trip time.
  • Working with WebParts Page, WebPart Zones & WebPartsJan 12, 2006. This tutorial considered to be the second part of the first tutorial "Creating a Simple WebPart Page and use WebServer controls as WebParts". Here we will see how can we remove and add WebParts during run time, adding personalizable properties to your WebParts and modifying there values also in run time.
  • C# Heap(ing) Vs Stack(ing) in .NET: Part IJan 14, 2006. Even though with the .NET framework we don't have to actively worry about memory management and garbage collection (GC), we still have to keep memory management and GC in mind in order to optimize the performance of our applications.
  • C# Heap(ing) Vs Stack(ing) in .NET: Part IIJan 15, 2006. Having a basic understanding of how memory management works will help explain the behavior of the variables we work with in every program we write. In this article I'll cover some of the behaviors we need to be aware of when passing parameters to methods.
  • C# Heap(ing) Vs Stack(ing) in .NET: Part IIIJan 15, 2006. Having a basic understanding of how memory management works will help explain the behavior of the variables we work with in every program we write. In this article we’ll cover an issue that arises from having reference variables in the heap and how to fix it using ICloneable.
  • C# 2.0 Nullable TypesFeb 14, 2006. The designers of C#2 have added the concept of nullable types to deal with a weakness of value types versus reference types. It is then essential to have properly assimilated these two notions.
  • The C# Value Type and BoxingFeb 17, 2006. Even though with the .NET framework we don't have to actively worry about memory management and garbage collection (GC), we still have to keep memory management and GC in mind in order to optimize the performance of our applications. One of the things we need to be aware of is how the Common Language Runtime (CLR) deals with references to value types.
  • How to Pass Control Values between Windows FormsMar 03, 2006. There are many questions about how to pass control's values from one form to another. This article is a step by step tutorial on how to pass a TextBox value from one windows form to a second form.
  • Nullable Types in C#: Basic IntroductionMay 02, 2006. This article gives a quick view in to the problems faced with the value type objects and the solution to the problems. This beautiful facility is introduced by Microsoft as an concept called “Nullable Types” in the C# 2.0.
  • Passing Data Between FormsMay 18, 2006. There are so many methods to pass data between forms in windows application. In this article let me take four important and easiest ways of accomplishing this.
  • Server.Transfer : Passing Values from One Page to Another PageJun 19, 2006. Some times, we want to pass values from one page to another page. There are many ways by which we can do this like: by using query string, or session variable, or Server.Transer etc. This article shows you, how to pass values from one page to another page by using Server.Transfer method.
  • System Views and Functions in SQL Server 2005 by Steve on Jul 06, 2006 Jul 06, 2006. I tried to explore some basic TSQL functions and VIEWS in SQL Server 2005. I believe this would be useful when we write DDL-DML Statements.
  • Tip: How to format a column value of a Report programmatically?Jul 21, 2006. In one of my reports, I had to change the format of a column programmatically depending on the value of the column.
  • Introduction to .Net Framework 2.0 Nullable TypesAug 23, 2006. Sometimes you work with a value type that does not have a defined value in certain circumstances. For example, a field in a database might need to distinguish between having been assigned a meaningful value and never having been assigned a value. Value types can be extended to take either their normal values or a null value. Such an extension is called a nullable type
  • Working of Reference Type and Value TypeSep 18, 2006. This article shows you all the difference between reference and value type variables.
  • Pull a column value from another list in your site in Sharepoint Portal ServerSep 21, 2006. In document and form libraries, you can create custom columns or metadata properties and interestingly, you can autopopulate these columns with data that can be hardcoded or extracted from other lists that are part of the same site where your document library is located.
  • Using Expression Property to create Columns with Dynamic ValuesOct 09, 2006. This article shows how to create columns with dynamic values using expression property.
  • How to change screen resolution in C#Oct 13, 2006. All programmers are facing common problem is how to change screen Resolution dynamically. In .Net 2005 it's very easy to change the screen resolution. Here I will explain you how can we get the Screen resolution and how we will change the resolution at dynamically and while unloading the page it will come as it was before. In dot net we can access the values of user's screen resolution through the Resolution class. It also affects all running (and minimized) programs.
  • Tip: How to pass Crystal Report Parameters Programmatically?Nov 02, 2006. This tip shows how to pass a Crystal Report parameters and their values programmatically.
  • Display Currency Values with a Custom ControlMar 12, 2007. This article shall describe the construction of a custom control used to display currency values. The control is intended for use in Win Forms application development.
  • Hiding the Date in a Date Time Picker ControlMar 26, 2007. This very short article will address an extremely easy way to hide the date value contained in a date time picker control. While the control contains no property that will allow you to hide the current date, nor to set the value of the control to null or an empty string, it is still possible, and even very easy to generate a date time picker control that does not display a date.
  • How to assign Text and Values to Items in an Unbound List Based ControlMar 28, 2007. The purpose of this article is to discuss the construction of a couple of simple custom controls that extend both the Combobox and the Listbox controls to allow them to be associated with both a text and a value property for each item in the control's list.
  • Custom Generic EventArgsMay 14, 2007. Before .NET 2.0, I found myself frequently creating custom EventArgs classes just to return a value from an event and would end of with a lot of extra classes bloating my code base that all basically had the same purpose.
  • Boxing and UnboxingJun 12, 2007. Details about the value type, reference type and details about the boxing and unboxing in C#.
  • Get the Sum of a particular column values in a DataGridJun 12, 2007. This article shows how we can get the total of a particular column of a DataGrid.
  • Formatting Dates in Crystal ReportsJun 14, 2007. Formatting a formula with a date value could be tricky in Crystal Reports. This article shows how to format date fields and date formulae in Crystal Reports.
  • Programming in C#: Understanding the SortedDictionary ClassJun 21, 2007. This article illustrates a powerful collection in C#, the SortedDictionary. In the article we will discuss two ways to sort key-value pairs: using an IComparer object and using IComparable keys.
  • Using SQL Server 2005 system SP to change extended property values of database objectsAug 01, 2007. In this article, that is the logical continuation of the earlier published articles, I will show how you can update the value of an existing extended property or add a new extended property to a database object with the help of the system stored procedures of SQL 2005. The examples are written using T-SQL.
  • Easily Find Tags and Values in a Large Xml Document Using XmlTextReader in C#Sep 20, 2007. In this article you will learn how to find tags and values in a large xml document using XmlTextReader in C#.
  • Read Asp.net Request Param and Session dynamically into propertiesOct 04, 2007. This Article shows how you can use Attributes and Reflection to dynamically populate property with value from param, session or context without writing any addition code. I have used this technique in past and I hope you will also find it useful.
  • Prompt for Service Account During Windows Service InstallationOct 18, 2007. This article shows how to customize the installation of a windows service in Visual Studio 2005 to prompt for a service account username and password. This process involves passing values from the install screen to a customized installer.
  • Functional Programming with C#: Dynamic List GenerationJan 27, 2008. This article covers how to use functions as the basis for generating lists given some initial seed values. This technique is useful for constructing different types of numeric series, calculating growth and decay, and also useful for searching algorithms.
  • Latest XY-Plot ControlFeb 28, 2008. This is an rewrite of the XY-Plot control. It fixes some issues such as the y-axis label, smoother plotting of points, axis with tick mark values that make sense, and more. (Updated for VS2008)
  • One or more rows contain values violating non-null, unique, or foreign-key constraints Mar 14, 2008. You may get this error when using a typed DataSet. This tip shows how to fix it.
  • Executing multiple stored procedures within a single transaction context from ADO.NetMar 20, 2008. This article discusses how we can execute multiple stored procedures in ADO.NET with different parameter values in a single Transaction context.

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