C# Interview Questions and Answers for Experienced & Freshers with Examples

Here I will explain c#.net interview questions and answers for freshers and experienced people or interview questions and answers in c#.net for 2+ or 3+ years of experienced people or freshers with examples. 

Please check below questions for c#.net interview questions and answers

OOPS (Object Oriented Programming) Concepts in C#.NET with Examples

Here I will explain oops concepts in c# with examples or object oriented programming concepts in c#.net with real time examples or oops or object oriented programming in asp.net with example.

Now let’s start learning about OOPS concepts in c#.net with real time examples

OOPS Concepts

Class:

 It is a collection of objects.

Object:

It is a real time entity.

An object can be considered a "thing" that can perform a set of related activities. The set of activities that the object performs defines the object's behavior. For example, the hand can grip something or a Student (object) can give the name or address. In pure OOP terms an object is an instance of a class

Edit Asp.net Gridview Row Details with Ajax Modalpopupextender in C#, VB.NET

Introduction:

Here I will explain how to edit gridview row details with ajax modalpopupextender popup in asp.net using c#, vb.net or update asp.net gridview row with ajax modalpopupextender popup using c#, vb.net.

Description:

In previous articles I explained clearly install ajaxcontroltoolkit in visual studio, Ajax modalpopup confirmation box with yes or no options, Login page with ajax modalpopupextender, Ajax show progressbar during postbacks in asp.net, how to show the gridview images with lightbox effect and many more articles related to gridview, ajax, modalpopupextender in asp.net using c#, vb.net. Now I will explain how to edit gridview row details with ajax modalpopupextender popup in asp.net using c#, vb.net.

ASP.Net Scrollable Repeater Control with Fixed Column Header using CSS in C#, VB.NET

Introduction: 

Here I will explain how to implement scrollable repeater control with fixed column header in asp.net using css classes in c#, vb.net with example or scrollable repeater with fixed header in asp.net using css in c#, vb.net.

Description:
  
In previous articles I explained Repeater Control Example in asp.net, sorting columns in repeater control in asp.net, scrollable html table with fixed header using css, Display time like facebook/twitter like 1 minute ago, hour ago, use of using statement in c# and many articles relating to asp.net, css, c#, vb.net and jQuery. Now I will explain how to implement scrollable repeater control with fixed header column in asp.net using css in c#, vb.net with example.

Scrollable HTML Table Body with Fixed Header using CSS with Example

Introduction: 

Here I will explain how to implement scrollable html table body with fixed header columns using css styles with example or html table with fixed header and scrollable or scrolling body using css with example.

Description:
  
In previous articles I explained Best Login page design with html and css, jQuery add border to all images using css, change default text color selection using css, jQuery add multiple markers to google map from database, Show more link to shorten text and display it and many articles relating to html, css, jQuery, JavaScript and asp.net. Now I will explain how to implement html table with fixed header and scrollable body using css.

To implement html table with fixed header and scrollable body using css we need to write the code like as shown below

AngularJS Convert Number to Currency Format and Limit to 2 Decimal Places

Introduction: 

Here I will explain how convert number to currency format in AngularJS or limit number to display / show with 2 or two decimal places in AngularJS with required currency format. By using currency property in AngularJS we can convert number to currency format and limit number to display with decimal values.

Description:
  
In previous articles I explained Angularjs convert lower case to upper case while typing text, Angularjs refresh div for every 1 second using interval mode, 5 + Angularjs Gridview and table plugin examples with demos, jQuery redirect to another page after 5 seconds and many articles relating to AngularJS, jQuery, JavaScript and asp.net. Now I will explain how convert number to currency format and limit number to 2 decimal places in AngularJS.

To convert number to currency format and limit number to 2 decimal places in AngularJS we need to declare number like as shown below

Show (Display) Sum of Columns Total in ASP.Net GridView Footer using C# and VB.Net

Introduction: 

Here I will explain how to show or display sum of columns total in gridview footer using asp.net in c#, vb.net or show sum of asp.net gridview columns total in footer using c#, vb.net with example.

Description:
  
In previous articles I explained bind dropdownlist in asp.net gridview using dataset, validate textbox controls inside gridview in asp.net, cascading dropdownlist in gridview using asp.net, change gridview header dynamically in asp.net, Delete multiple rows in gridview using checkbox in asp.net and many articles relating to gridview, asp.net, c#,vb.net and jQuery. Now I will explain how to show or display sum of columns total in gridview footer using asp.net in c#, vb.net.

SQL Server Return All Records When a Query Parameter is Blank or Null or Empty

Introduction:

Here I will explain how to return all the records when a query parameter is blank or empty or null in sql server or query get all the records from database when input parameter is null or blank or empty in sql server. We need to write a condition to check whether query parameter is blank or not in sql server based on that we can return all records or matched records.

Description:

In previous articles I explained joins in sql server, function example in sql server 2008, Primary key constraint in sql server, foreign key constraint in sql server, query to remove first and last characters from string in sql server, Pass XML file as parameter from C# to SQL stored procedure, cursor example in sql server and many articles relating to SQL server. Now I will explain how to return all the records when a query parameter is blank or empty or null in sql server.

Filter Asp.net Gridview using Dropdownlist Selection in C#, VB.NET

Introduction: 

Here I will explain how to filter asp.net gridview data using dropdownlist selection in asp.net in c#, vb.net or filter gridview records with dropdownlist selection in asp.net using c#, vb.net.

Description:
  
In previous articles I explained bind dropdownlist in asp.net gridview using dataset, validate textbox controls inside gridview in asp.net, cascading dropdownlist in gridview using asp.net, change gridview header dynamically in asp.net, Delete multiple rows in gridview using checkbox in asp.net and many articles relating to gridview, asp.net, c#,vb.net and jQuery. Now I will explain how to filter asp.net gridview data with dropdownlist selection in  in asp.net using c#, vb.net.

Asp.net Gridview Reorder Rows with Drag Drop Options using jQuery Tablednd Plugin

Introduction:

Here I will explain how to reorder asp.net gridview rows with drag and drop options using using jQuery in asp.net with jQuery tablednd plugin or jQuery reorder or drag and drop gridview rows in asp.net using C#, VB.NET with jQuery tablednd plugin.

Description:

In previous articles I explained Take screenshot of webpage in asp.net, Show Gridview row details in tooltip, Show tooltip for gridview header columns, Asp.net Interview questions, Highlight Gridview records based on search and many articles relating to Gridview, SQL, jQuery,asp.net, C#,VB.NET. Now I will explain how to reorder or drag and drop gridview rows using jQuery in asp.net with jQuery tablednd plugin.

Change Row Position or Order in Asp.net Gridview using C#, VB.NET

Introduction:

Here I will explain how to change gridview row order or position on button click in asp.net using c#, vb.net or move asp.net gridview rows up and down with arrow button clicks in asp.net using c#, vb.net.

Description: 

  

In Previous articles i explained many articles relating to gridview in asp.net. Now in this article I will explain how to change gridview row order or position on button click in in asp.net using c#, vb.net on button click. For that first design one table in database and give name as MobileDetails as shown below

Filter Asp.net Gridview with Dropdownlist using FilterExpression in SqlDatasource

Introduction: 

Here I will explain how to filter asp.net gridview data with dropdownlist using filter expression in sqldatasource in c#, vb.net or filter gridview records with dropdownlist selection in asp.net using sqldatasource in c#, vb.net.

Description:
  
In previous articles I explained Delete multiple rows in gridview using checkbox in asp.net, Get selected row cell value from gridview in asp.net, retrieve images from path stored in database in asp.net, Get textbox value palced in gridview in asp.net and many articles relating to asp.net, c#,vb.net and jQuery. Now I will explain how to filter asp.net gridview data with dropdownlist using filter expression in sqldatasource in c#, vb.net.

jQuery Get Elements with Id or CSS Class Name with Example

Introduction: 

Here I will explain how to use jQuery to get elements with css class name or id with example. We can get elements (div) by using class name or id easily in jQuery.

Description:
  
In previous articles I explained best login page design using css, change button color on mouseover using css, jQuery add border to images using css classes, 8 best audio player plugin examples and many articles relating to css, AngularJS, jQuery, JavaScript and asp.net. Now I will explain how to use jQuery to get elements with css class name or id with example.

To get elements with class name or id using jQuery we need to write the code like as shown below

jQuery Remove() and Empty() Functions with Examples

Introduction: 

Here I will explain how to use jQuery empty() function and remove() function with examples. In jQuery both empty() and remove() functions are used to remove the elements. Empty() function in jQuery is used remove inside content of div element and remove() function is used to remove complete div element.

Description:
  
In previous articles I explained 8 best audio player plugin examples, jQuery video player plugin examples, jQuery Hover dropdown menu, jQuery bouncing menu example and many articles relating to AngularJS, jQuery, JavaScript and asp.net. Now I will explain how to use jQuery empty() function and remove() function with examples.

By using empty() function we can remove inside content of div element and remove() function will remove complete div element for that we need to write the code like as shown below