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Generics

By SHANTILAL
Reusability in C#: C# lets you  reuse  code in two major ways: Inheritance Generics Let’s look at each: 1.  Inheritance: Inheritance is an  object-oriented  concept. You write a  base class  and then extend it to create more  specific classes . Example:      class Animal       {            public void Eat() { Console.WriteLine("Eating..."); }      }      class Dog : Animal       {            public void Bark() { Console.WriteLine("Barking..."); }      }      // Reusing code via inheritance     Dog d = new Dog();     d.Eat(); // From Animal     d.Bark(); // From Dog ✅  Pros : Useful when classes share common behavior. ❌  Cons : Less flexible when working with  types  (like  int ,  string , etc.) 2.  Generics: Gen...
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datatable compute sum in c# | datatable compute() function

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datatable compute sum in c# | datatable compute() function Hi Readers, Today I am going to explain you the use of compute() function of Data table using C#.NET .  Let's begin.. datatable column sum in c# datatable compute sum in c# | datatable compute() function Let's say that we have the following rows filled in the Data table with the columns ID,NAME,AGE and SALARY as shown in snapshot below:- employees detail in datatable In order to calculate the figures like total of salary, average of salary, maximum salary and minimum salary, we can use the compute() function of the Data table. The compute() function loops through each value of the column's cell and then perform the calculation. For the above data table's salary column, lets find the total, average, maximum and minimum of salary one by one using compute() function:- datatable compute sum in c# | datatable compute() function Calculate the total of sala...
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Adding rows to Datatable using C#.NET

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Adding rows to Datatable using C#.NET Hi Readers, Today I am going to explain you 2 ways that we can use to add rows to a Data table using C#.NET.  So lets begin: Add row in datatable in c# Adding rows to Datatable using C#.NET > Lets say, we have a data table with the columns ID, NAME, AGE AND SALARY and I want to add rows to this data table using C# coding . > First of all, add columns to data table using the following lines of code: DataTable dtEmployee = new DataTable("Employee"); dtEmployee.Columns.Add("ID", typeof(int)); dtEmployee.Columns.Add("NAME", typeof(String)); dtEmployee.Columns.Add("AGE", typeof(int)); dtEmployee.Columns.Add("SALARY", typeof(Decimal)); Add row in datatable in c# > Now if we want to add rows to the above data table at run time, we have the following 2 ways to do so: Adding rows to Datatable using C#.NET 1. Using DataRows :- In this, we create an o...
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C# Dictionary

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> In this post, we will see how to use a dictionary in C#. > A dictionary in C# is used to store collection of values with key values as pair. > So whenever user wants to get the value then he will have to pass the key value to the dictionary and it will return the value to the user. > The namespace of the C# dictionary is System.Collections.Generic. > Let’s take a simple example of storing digits from 0 to 9 as key value and these digits in the word form as the collection values. > Here, the user will type a digit from 0 to 9 and on clicking the button, it gives the digit in the word form. > To keep this example simple, here the dictionary will be having digits from 0 to 9 only and if user enters a value less than 0 or greater than 9 then he will get the appropriate message. > Following is the code for demonstrating the use of the Dictionary : HTML Code: <body>    <form id="form1" runat="server">   ...
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Things to know if you are a web developer or want to be

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Following are some of the basic points to know: WHAT YOU SHOULD KNOW TO BECOME A .NET WEB DEVELOPER?            > HTML(Hyper Text Markup Language).           > Client Side Scripting language like JavaScript or VBScript or library like jQuery.           > Programming languages like C#,VB(Visual Basic),C++.           > Database query language like SQL(Structure Query Language),Oracle etc.           > CSS (Cascading Style Sheet) to make web pages look interactive. WHAT IS A WEB SERVER > A web server is  a program which serves web pages to the web users. > The web user uses the application called 'Browser' (e.g. Google Chrome, Mozilla Firefox, Opera Mini etc.) t...
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.config files

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> To store the connection strings at a place, configuration files are used in .net application.  > We use web.config file for web application and app.config file for windows application. WEB.CONFIG:- •          It’s a configuration file for web application. •          This file is used to store the connection string which contains the code for the connectivity with the data source. •          This file is added by default if we are developing ASP.NET web application. •          The extension of a configuration file is .config . •          A configuration file can store multiple connectionStrings .         APP.CONFIG:- •          It’s a configuration file for windows application....
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ConfigurationManager Class

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•          The ConfigurationManager class is used to read the connectionString from the configuration file. •          This class is present in the Configuration namespace. •          The assembly reference of this class is added by default for web application. •          But for windows application,we need to add assembly reference explicitly. •          To add reference in windows application project in visual studio:- •          Go to solution explorer. •          Right-Click on the references section. •          Select the Add Reference option from the menu. •          Select the System.Configu...
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