A NullPointerException is a runtime exception in Java that happens when you attempt to perform an operation on a null object reference. In other words, you're attempting to access a member (such as a method or field) of an object that hasn't yet been initialized, which results in a null reference.

There are two common objects in ADO.NET to read data, DataSet, and DataReader. C# DataSet and C# DataReader classes represent these objects. In this article, we'll learn about ADO.NET DataReader and how to use a DataReader in C#.

An ArrayIndexOutOfBoundsException is a runtime exception in Java that happens when you attempt to access an array element with an index that is outside the array's valid range of indices. In other words, you're attempting to access an element in the array at an index that doesn't exist.

Hello guys, now a days we often have to use web api's in our Asp.Net core projects. In this article we will see how to create web api in asp.net core. We will create HttpGet,HttpPut,HttpPost and HttpDelete api's and see how to test them.

The NoSuchWindowException in Java is an exception that's thrown when a WebDriver (typically from a Selenium framework) tries to switch to a window that does not exist. This usually occurs in web automation scenarios when you're working with multiple browser windows or tabs

So starting of from the beginning Ajax is used for Asynchronous Javascript and XML. We can use it for many purposes. Few basic uses of Ajax are:- Update page without reloading the page providing better performance. Request data from a server - after the page has loaded which can be used in loading Partial Views. Send data to a server without reload - in the background making it easier to performance Save, Delete operations smoothly. Ajax in Asp.Net MVC

Hello guys often when working in Asp.Net core application , we sometimes need to schedule some process or task on regular interval. So we will see how to create task scheduler in Asp.Net core for recurring jobs.

Many times you might have got requirement of changing DateTime Format Of your IIS Hosted Web Application.Sometime Date format changes work on LocalHost but on IIS the date format remains same. Select Application Pool Select Project and click on Advanced settingsExpand Process Modal and Select Identity Select Custom Account and Click on set and enter UserName Password(System Credentials) and ok

To check if a character is a vowel or a consonant in C, you can write a simple program that evaluates whether the character is one of the vowels (a, e, i, o, u) or not. Here's a basic example of how to do this:

Hello guys we often have to deal with json files in asp.net Core and we also have to read json files using c# and asp.net. So in this article we will see how to read json file in asp.net core 8.0. We will be creating one json reader class for this purpose.

Type conversions between classes in an inheritance hierarchy are referred to as "upcasting" and "downcasting" in Java. When working with polymorphism and inheritance, these conversions are frequently required. Let's look at both ideas:

How to Implement CAPTCHA in ASP.Net MVC

In C++, input and output operations are commonly performed using the Standard Input/Output Library, which includes the <iostream> header. This library provides the 'cin' and 'cout' objects for reading input and displaying output, respectively.

Creating a NuGet package from a .NET Framework Class Library involves creating the DLL in Visual Studio on Windows, then using the nuget.exe command-line tool to create and publish the package.

How to upload files to Azure Blob Storage in an ASP.NET Core Web

After installing or updating the system or uploading your web app on IIS, you may receive the error HTTP Error 502.5 - ANCM Out-Of-Process Startup Failure upon accessing the website. So we will see how to solve that error.

Java includes a number of data structures for storing and manipulating collections of objects. The 'LinkedHashMap' class, which is an extension of the 'HashMap' class, is one of the important classes in the Java Collections Framework. LinkedHashMap, unlike HashMap, preserves the order of its items depending on the insertion order, making it helpful in cases where the order of components must be maintained based on their arrival time.

In Java, access modifiers are keywords that control the visibility and accessibility of classes, fields, methods, and other members within a class or package.

Hello guys , we often need to integrate sms functionality in our asp.net web application . For that purpose we often use different sms libraries. In this article we will see how to send sms using Twillio in Asp.Net.

Hello guys while using Asp.Net MVC you can sometime face error while uploading large file . It can even occure while posting files on Web API. So we will see how to fix error Status Code 413 Request Entity Too Large.

Jquery Full Calender Integrated With ASP.NET

Hello guys, sometimes we have to integrate google Login in our .Net applications. It can be hard sometimes to integrate that. So we will see how to integrate that using GoogleAuthentication Nuget package , which makes it easier to use and integrate.

In this article, we'll dive into integrating PayPal subscriptions into an ASP.NET Core application. PayPal offers a robust API that allows developers to create and manage subscription plans seamlessly. We'll walk through a sample code snippet that demonstrates how to create a subscription plan, add a product, and initiate a subscription for a user.

Hello guys we often need to implement charts in our web project. In this tutorial we will see how to implement pie chart in asp.net mvc using am charts library.

Hello guys in this article we will see how to solve an exception when you try to use old rdlc report and make changes into that . You will see you will get an exception ReportProcessingException: The report definition is not valid. Details: The report definition has an invalid target namespace 'http://schemas.microsoft.com/sqlserver/reporting/2016/01/reportdefinition' which cannot be upgraded. We will see how to solve that.

Hello guys, considering the security of web applications and api's we often have to implement security tokens. Sometimes we use owin authentication and sometimes JWT Tokens. So in this article we will see how to implement JWT Token Authentication in ASP.NET MVC using JWT.

Error Handling in Asp.Net Core has changed a bit from what we used to use in Asp.Net Mvc. Before .Net Core We used to use OnException Methods to handle Exceptions while executing actions But it doesn't' see working in .Net Core as many features are changed.So In this Article we will see how to make exception handling work in Asp.Net Core.

Hello guys, we all would have used cookies in our Asp.Net Core web projects. If you have used httpcookies in Asp.Net core 2.1 project and you are trying to update your .Net core version to 3.1 . You will notice your HttpCookies are not working there. So, we will see how to fix HttpCookies Issue with Asp.Net Core 3.1.

Hello guys, when you work with Neo4j database in asp.net. Sometimes you may receive an error Neo4j.Driver.ClientException: 'The old parameter syntax `{param}` is no longer supported . While executing the queries. So we will see how to solve that error.

Hello guys, often while dealing with project where we need to implement payment systems and need user to enter card number and show them the card number format properly. So for that purpose we have to use controls from payment gateways which are bit harder to manage on custom websites. So we will see how to implement Input Box Card Number Formatting using jquery.

Operator overloading in C++ allows you to define how operators behave when used with objects of user-defined classes. You can customize the behavior of operators, such as +, -, *, /, ==, and many others, to work with your own classes, making your code more intuitive and expressive.

Hello guys, in this article we will learn how to reload vue js child component. Sometime we need to reset child components or just re-render them. There few ways to reset child components but for beginner and those who have just started with vue js it can become a tough task to understand the flow to reset child components. So we will see how to reload child component.

Hello guys, now a days we often need to add QR Code Generator in our websites to store some information in QR Code for implementing that we will use Jquery QR Code js library with Asp.Net MVC. Jquery QR Code Generator is a free jquery library which can be used across different programming languages.

In this article, we'll explore how to send calendar events via email using .ICS files in an ASP.NET application. We'll walk through the process step-by-step and explain the provided code snippet along the way.

Hello guys, in this article we will learn how to integrate zoom c# wrapper in .Net. You can download the sample code from zoom official website . And after that follow this article for zoom integration in windows C# project.

Record Screen In asp.net MVC using RecordRTC

A do-while loop is a sort of loop construct in C that repeatedly runs a block of code as long as a stated condition is true. The do-while loop, as opposed to the while loop, ensures that the code block is performed at least once, even if the condition is initially false. The basic syntax of a do-while loop in C is as follows:

In this tutorial, I will explain how we can use the Web APIs in the Angular application using HttpClient. Before we start the step-by-step process

Publish Website using FTP in Visual Studio If we use FTP (File Transfer Protocol) to publish web applications, we need to enter all credentials provided by the FTP hosting company, and application files will upload directly to our FTP hosting space.

The foreach loop in C# executes a block of code on each element in an array or a collection of items. When executing foreach loop it traversing items in a collection or an array. The foreach loop is useful for traversing each item in an array or a collection of items and displayed one by one. the foreach loop when working with arrays and collections to iterate through the items of arrays/collections. The foreach loop iterates through each item hence called foreach loop.

In C, input and output functions are used to interact with the user and the external world. These functions allow you to read data from the user or files and write data to the screen or files. The standard library provides several functions for input and output

we will learn Microsoft Outlook Add Contacts and Get Contacts service. We will learn how to add and get Contacts using Microsoft Exchange Service.

Hello guys we often have to deal with json files in asp.net mvc and we also have to read json files using c# and asp.net. So in this article we will see how to read json file in asp.net mvc.

Hello guys, often while working with angular js you sometimes have requirement of implementing chat functionality where user can press @ and select users from the list , similar to what we do on skype or all big chatting platforms. For that purpose we can use Angular-mentions which is a package in Angular js for skype like @ chat functionality. We will see how to use that in detail.

In Method Overloading we have two or more than two methods those have the same name but different parameters.

Hangfire is an open-source library to schedule and execute background jobs in .NET applications. You'll be able to create a simple background process inside the same application pool or thread without creating separate applications. Hangfire creates background jobs in persistence storage, like MS SQL Server, Redis, MongoDB, and others, that may prevent you from losing the job on recycling IIS pools or exception prevalence.

JSON (JavaScript Object Notation) is a lightweight data interchange format commonly used for transmitting data between multiple systems, mostly in Web APIs and client applications. JSON is a text-based format that is easy for humans to read and write and also easy for machines to parse and generate. It is language-independent, meaning it can be used with any programming language that has the capability to parse JSON data.

Hello guys, sometimes we need to import data from excel file in asp.net MVC using OLE DB. So we will use OLE DB Connection for that as that is really fast and effective while reading large excel files. You can check the steps on using that with asp.net MVC project.

To generate an image using C#, you can utilize the System.Drawing namespace, which provides classes for working with images. Here's a simple example that demonstrates how to create a new image and save it to a file:

The Extender Provider failed to return an Extender for this object

In Java, the ArithmeticException is a subclass of the RuntimeException class. It is thrown when an arithmetic operation fails or produces an incorrect result. One of the most common causes of an ArithmeticException is attempting to divide by zero.

TreeSet is a Java Collections Framework class that implements the SortedSet interface. It returns a set that is sorted in natural order or by a provided comparator. TreeSet, unlike HashSet, does not allow duplicate elements and delivers fast performance for simple operations like adding, removing, and searching for elements.

In a production environment, securing your Swagger UI is essential to prevent unauthorized access. You can use authentication middleware to protect the Swagger UI endpoint. Below is an example of how you can configure authentication for Swagger UI in an ASP.NET Core application.

PayU or PayuMoney is the fastest growing Payment Gateway in India that supports all major banks and credit/debit card for payment settlement. PayUMoney provides support to enterprise user on behalf of PayUbiz Payment Gateway. As PayuBiz support more number of service then Payumoney.

In this article we will see how to use dapper with stored procedure for selecting data from database with parameters.

CSS (Cascading Style Sheets) is a style sheet language used to describe the display of an HTML or XML document. It allows web developers to control the appearance and layout of multiple web pages at once. Here's a detailed overview of some fundamental CSS properties:

Image compression is a way of reducing the size of the images. compress your image in different formats PNG, JPEG, and GIF images. We will learn how to compress image using ImageCompress nuget package which you can download from nuget.

A default constructor in Java is one that is provided by the Java compiler if no other constructors are explicitly defined in a class. The default constructor takes no arguments and is in charge of setting the object's fields to default values.

Hello guys, sometimes while working in your asp.net web project . We face the need of converting our html to image on in other words we want to save our html output as image in your system. So, we will see how to Convert HTML String To Image In C# Asp.net.

In this article, we suggest you to get acquainted with the free editor of web languages - CodeLobster IDE. It is presented on the software market for a long time already, and it wins a lot of fans.

Hello guys, sometimes we need to put validations on textboxes to accept certain type of data. For that purpose , we will see how to apply input validations using javascript. This will contain Numbers validation , Number And Decimal validation , Alphanumeric validation , Alphabet validation.

Hello guys , we often need to integrate sms functionality in our asp.net web application. For that purpose, we often use different SMS libraries. This article will show how to send SMS using Twillio in Asp.Net MVC.

Hello guys, sometimes we need to put validations on textboxes to accept certain type of data. For that purpose , we have to apply validation to stop backSlash on keypress and also on copy/paste. So we will see how to apply Input validation on keypress and copy paste using javascript.

To obtain the IP address of a device using C#, you can use the Dns class from the System.Net namespace. Here's an example of how you can retrieve the IP address:

Hello guys, sometimes we often want to restrict user from typing aplhabet characters and just all them to type numeric characters only. So we will see how to apply numeric only validation in javascript.

To pass a reference of arguments to the function the ref keyword is used in C#.

Office 365: Migrating and Managing Your Business in the Cloud

Hello guys in this tutorial , we will learn the first step of using sql server. We will see how we can create database and perform crud operation using sql queries.

Hello guys, we often want to integrate payment gateways in our Asp.Net applications. Some of the most popular payment gateways are payumoney,paypal,stripe and razorpay. We have already covered payumoney and stripe in our blogs. In this article we will see how to implement paypal in Asp.Net Core.

Hello guys, we often need to implement type ahead functionality in our project. So for implementing type ahead with input boxes we will use Jquery Autocomplete. We will also see how to implement highlight text functionality in Jquery Autocomplete.

Hello guys , we often need to integrate twillio sms functionality in our asp.net web application. Sometimes we need to get Sms logs or history for all sent sms from twillio. So we will see how to get sms logs from twillio in Asp.Net MVC .

The List class has a lot of useful methods that you can use to organize data. This article will cover how to sort the items in your list and make them easier to read. The Sort method is the simplest way to sort a C# list

For many applications, you want to create and manage groups of related objects. There are two ways to group objects: by creating arrays of objects, and by creating collections of objects. Arrays are most useful for creating and working with a fixed number of strongly typed objects. For information about arrays, see Arrays.

JWT Token Authentication And Authorizations In .Net Core Web API

In the technologically driven era we live in, software engineering stands not just as a profession but as a dynamic and vibrant journey. This journey is filled with opportunities for continuous learning, growth, and professional advancement. For those who dare to delve into its intricacies and navigate its challenges, software engineering offers numerous routes to personal and professional development.

When the variable of one data type is changed to another data type is known as the Type Casting.

Hello guys in this video we will see how we can get visitors location information like country and city using simple javascript code. We will see how to do that.

Hello guys in this article we will see how to implement JWT Token Authenticate with Validate Token and Refresh Token automatically . We will create one action filter attribute that will automatically validate all the request and if the token is expired it will refresh the token again.

By defining your own classes, you can produce user-defined data types in Java. These classes let you create unique data structures that encapsulate data and action. Here is how to make a Java user-defined data type:

Database Backup .bak