New Additions
Here Mudassar Ahmed Khan has explained with an example, how to save (insert) selected (checked) RadioButton value from the RadioButtonList (list of RadioButtons) to database using Entity Framework in ASP.Net MVC Razor.

Multiple RadioButtons (RadioButtonList) will also be populated with selected value from database using Entity Framework in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to pass (send) RadioButton value from View to Controller in ASP.Net MVC Razor.

Multiple RadioButtons will be populated from database and when the Form is submitted the value of the selected (checked) RadioButton will be sent to the Controller in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to pass (send) multiple CheckBox values from View to Controller in ASP.Net MVC Razor.

Multiple CheckBoxes will be populated from database and when the Form is submitted the values of all the CheckBoxes (Checked and Unchecked) will be sent to the Controller in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to save (insert) multiple CheckBoxes (CheckBoxList) values to database using Entity Framework in ASP.Net MVC Razor.

The CheckBoxes (CheckBoxList) will also be populated with selected values from database using Entity Framework in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to check Username availability i.e. check whether Username exists in database or not using JavaScript XML HTTP function and AJAX and in ASP.Net with C# and VB.Net.

This article will illustrate how to check Username availability in database on Registration Form by making AJAX call to database using JavaScript XML HTTP function and WebMethod in ASP.Net with C# and VB.Net.
Here Mudassar Ahmed Khan has explained with an example, how to check Email address availability i.e. check whether Email address exists in database or not using jQuery AJAX in ASP.Net with C# and VB.Net.

This article will illustrate how to check Email address availability in database on Registration Form by making AJAX call to database using jQuery AJAX in ASP.Net with C# and VB.Net.
Here Mudassar Ahmed Khan has explained with an example, how to convert Base64 string to Byte Array using C# and VB.Net.
Here Mudassar Ahmed Khan has explained how to solve the exception (error) occurring during AJAX calls in ASP.Net MVC i.e. Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.

The above exception (error) occurs in ASP.Net when AJAX calls are made using AJAX clients like jQuery AJAX or AngularJS and the length of the AJAX Response exceeds the default predefined limit of 2097152 characters i.e. 4 MB.
Here Mudassar Ahmed Khan has explained with an example, how to get the selected Text and Value of DropDownList inside SelectedIndexChanged event in ASP.Net using C# and VB.Net.

Inside the SelectedIndexChanged event, the selected Text and Value of ASP.Net DropDownList will be displayed in JavaScript Alert Message Box using C# and VB.Net.
Here Mudassar Ahmed Khan has explained explain with an example, how to perform select, insert, edit, update and delete operations in GridView without using PostBack in ASP.Net using C# and VB.Net.

This process is also known as CRUD i.e. Create, Read, Update and Delete in GridView.

The CRUD operation will be done without using PostBack using jQuery AJAX in ASP.Net.
Here Mudassar Ahmed Khan has explained with an example, how to use SelectedIndexChanged event of DropDownList placed inside AJAX UpdatePanel in ASP.Net using C# and VB.Net.

The AsyncPostBackTrigger needs to be specified in the AJAX UpdatePanel in order to fire the SelectedIndexChanged event of the DropDownList using Partial PostBack.

The SelectedIndexChanged event will work / fire / trigger only when the AutoPostBack property of the ASP.Net DropDownList is set to True.
Here Mudassar Ahmed Khan has explained with an example, how to implement Role based Bootstrap Menu in ASP.Net MVC Razor.

User Login Authentication and Roles will be implemented using Custom Forms Authentication in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to use Generic HTTP Handler (ASHX) in ASP.Net MVC Razor.

The Generic HTTP Handler (ASHX) will be using Entity Framework to populate data from database and the output will be returned in JSON format.

The Generic HTTP Handler (ASHX) will be called using a jQuery Client which will read the JSON values and populate it into an HTML Table in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to get the value of the HTML Input CheckBox in ASP.Net Code Behind (Server Side) using C# and VB.Net.

The values of multiple checked HTML Input CheckBoxes will be fetched in ASP.Net Code Behind (Server Side) using Request.Form collection and Name property.
Here Mudassar Ahmed Khan has explained with an example, how to convert ASPX Page to PDF using iTextSharp in ASP.Net, C# and VB.Net.
Here Mudassar Ahmed Khan has explained with an example, how to dynamically generate and display QR Code Image in ASP.Net MVC Razor.

The QR Code Image will be dynamically generated in ASP.Net MVC Razor using the QRCoder library which is an Open Source Library QR code generator.
Here Mudassar Ahmed Khan has explained with an example, how to dynamically generate and display Barcode Image in ASP.Net MVC Razor.

The Barcode Image will be dynamically generated using .Net Graphics API and Barcode Font in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, the difference between ViewData, ViewBag and TempData in ASP.Net MVC.

ViewData, ViewBag and TempData are used for transferring data and objects between Controller to View or from one Controller to another in ASP.Net MVC.
Here Mudassar Ahmed Khan has explained with an example, how to implement and use jQuery Tabs using the jQuery UI Tabs plugin in ASP.Net MVC Razor.
This article will also illustrate how to maintain / retain / preserve the selected tab of jQuery UI Tabs plugin across Form Submissions in ASP.Net MVC Razor.
Here Mudassar Ahmed Khan has explained with an example, how to send email with multiple attachments using Multiple FileUpload control in ASP.Net 4.5 using C# and VB.Net.

The multiple files to be send as attachments along with mail will be uploaded using ASP.Net 4.5 Multiple FileUpload control and will be dynamically added as attachment in the MailMessage class object without saving in any folder on disk.

This article will make use of Gmail SMTP Mail Server for sending emails, to send email with Gmail SMTP Server, you will need to use an email address and password of a valid Gmail account and along with that you will need the Gmail SMTP Mail Server settings.
Here Mudassar Ahmed Khan has explained with an example, how to implement simple User Login form in ASP.Net MVC Razor. This User Login form will be implemented using Custom Forms Authentication and Entity Framework.

The Forms Authentication makes use of ReturnUrl parameter to redirect user to the requested page after Login in ASP.Net MVC.
Here Mudassar Ahmed Khan has explained with an example, a simple login form using Forms Authentication which validates user login from database and redirect User to ReturnUrl page i.e. the Page present in ReturnUrl QueryString and not DefaultUrl page using FormsAuthentication.RedirectFromLoginPage method in ASP.Net using C# and VB.Net.
Here Mudassar Ahmed Khan has explained with an example, a simple login form using Forms Authentication which validates user login from database and redirect User to Home page i.e. the Default Landing page using FormsAuthentication.RedirectFromLoginPage method in ASP.Net using C# and VB.Net.
Here Mudassar Ahmed Khan has explained with an example, a simple login form using Forms Authentication which validates user login from database and if the login is valid then a check is made for RedirectUrl in QueryString, if it exists then the user is redirected to value of the RedirectUrl and if it does not exists then the user is redirected to the Home page in ASP.Net using C# and VB.Net.
Here Mudassar Ahmed Khan has explained with an example, a simple login form using Forms Authentication which validates user login from database and restricts (prevents) user to login multiple times using same credentials in ASP.Net using C# and VB.Net.

If the user is already logged in and he tries to access the Login page then he is redirected directly to the Home page i.e. the Default Landing page after Login.