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January 6, 2022

An Introduction To JavaScript Grid Libraries

Sencha

Rendering large volumes of information is a crucial requirement for many website features, for which websites often use tables for organizing the rendered data. When loading and processing a large data set on a web page, efficiency is important because it should have a minimal impact on the user experience. When you want to show information in tables, a data grid helps you show many records without significantly affecting the website’s performance. A data grid is like an HTML table that renders data in rows and columns, and today, many JavaScript Grid Libraries provide unique features for implementing and operating data grids. If you are a web developer looking forward to using a grid library for your applications, it is important to know what they are and what you should look for when choosing a grid library. A Javascript grid library is a collection of functions that enables you to easily create data grids for large data sets. Also, a grid library allows you to do various useful functions on the data, such as data fetching, scrolling, sorting, grouping, and filtering. More advanced grid libraries support advanced grid operations such as pagination, advanced searching, sorting with different conditions, and many more. JavaScript is the main language used by web applications,s and todays’ websites need to deal with a large volume of data. Therefore, implementing data grids and related functionalities from scratch will consume a lot of development time. A data grid library allows web developers to significantly accelerate development tasks and save development and testing time. Also, developing data grids from scratch while preserving the website’s performance is a challenging task. Most data grid libraries can perform data rendering and other related operations efficiently without significantly affecting the website performance. Therefore, JavaScript grid libraries have become popular for data display and manipulation in web and mobile applications. There are many JavaScript libraries on the market. Sencha offers a high-performing grid that lets developers load and manipulates a massive data set on the client-side within milliseconds. Experiments have shown that the Ext JS data grid has an outstanding scrolling speed 300x faster than other popular javaScript grids, which can fetch and display massive sets of data in less than one second. Ext Js Grid offers simple to advanced grid functionalities such as filtering, grouping, live data streaming, infinite scrolling, and many more. Using plugins, you can add extra functionalities such as column re-sizing, row operations, and paging toolbar. There are also many open-source javascript grids available. For example, Grid.js is also a free and open-source JavaScript grid library based on TypeScript. You can easily use it with other javascript frameworks such as React, Angular, and Vue.js. Another popular JavaScript grid is the Jquery Grid. This enabled jQuery plugin uses Ajax callbacks to load data dynamically integrated with any server-side technology like PHP, ASP, JSP/Java Servlets, ColdFusion, Perl, etc. Grid Performance Many JavaScript grids fail because of slow data loading experience creates user frustration. Therefore, when choosing a grid library for your needs, it is very important to check its performance. If the grid is agh-performing, its initial data load time will be smaller. In addition, check the grid’s scrolling performance because users often need to scroll through many records. A good scrolling speed indicates that users can quickly scroll through the […]

January 5, 2022

How To Create Real-Time Applications With SignalR On Windows

Delphi

History on Client-Server Apps When the original web first came into widespread public use things were reasonably basic. Webpages were effectively specialized documents, like a library. Users clicked on links to articles they found interesting. Somewhere, perhaps on another side of the world, another computer or server was the destination for that click or as we came to call it: the request. The user sends a request and, the server, the far-off computer, gives a response back to the user for every request. That response was typically formatted text, images and later, movies and music. Editing web pages was done mostly using plain text editors rather than more advanced ide software. After several years and a few iterations, Web 2.0 emerged allowing a more interactive, programmable kind of web page which behaved more like an application. The process was asynchronous and, we were able to execute commands on databases and manipulate the data they contained in that way. Like, create a user, get all users and delete a user. With the advent of Web 3.0 and beyond, a new concept applied to the systems is a continuous connection between a client and a server. Web applications could now carry out significantly complex tasks, interact with specialized hardware like GPS sensors and other activities rivaling traditional desktop application capabilities. Along with this rose the need to implement real-time connections which transmitted data between the web browser and servers in an optimized and highly efficient way. The connection between the server and client can be used on either side to update and set the state and react accordingly. We refer to that highly interactive nature as “real-time web applications”. They’re a long way from those original electronic reference type documents of the original web. What methods are there for implementing real-time web applications? Interval polling This method is very straightforward. We go to the server and see if we have anything we need to do in the interval. And there are 3 cases: Nothing will be returned The server has data that return to us Some sort of internal server error But no matter what, we go to the server to see if we can do anything. Problems of interval polling More connections, more overhead Mode bandwidth The server can’t keep up with the request Long polling As you can see, we were making requests every 10 seconds no matter what. Long polling is a call that we open up and remains open until the server has something for us (depending on browser timeouts). And after a timeout, we open up our request all over again. Benefits of this method: Less server overhead and resource consumption The downside is we still make and open connections regularly. Server-Sent Events In this method, we open a connection to the server and, that server can remain open indefinitely. And server makes use of this connection or pipe to send us messages. The best thing about this is the server can push data to the browser without requiring multiple connections. But this is one way in which the client cannot send messages to the server. Web Sockets Web sockets are the ability of the client in the server to open a one-on-one connection, which they both can send data over. What are the benefits of Web Sockets? Bi-directional communication […]

January 4, 2022

7 Tips for Making A Good Javascript Web Framework Even Better

Sencha

Sencha Ext JS is the most comprehensive JavaScript framework for building data-intensive, cross-platform web and mobile applications for any modern device. Ext JS includes 140+ pre-integrated and tested high-performance UI components. Ext JS includes 140+ UI components, such as HTML5 calendar, grids, pivot grid, D3 adapter, trees, lists, forms, menus, toolbars, panels, windows, and much more. Hundreds of user extensions are also available from the Sencha community. Let’s take a look at 7 tips for optimizing developer productivity with Ext JS. How can I use Graph QL with Ext JS? GraphQL schema and ExtJS data model work together very well. Apollo Client provides a core library that can be included in ExtJS projects to easily manage GraphQL requests, adding powerful features such as in-memory caching. Find out more about GraphQL usage in one of the best javascript libraries. How can I build login forms with Ext JS? ExtJS provides built-in form components to quickly and easily create fully functional and validated forms. In this example, we demonstrate how to create a login/registration form within minutes with the following features. Adding textfield, numberfield, datefield Adding form validation (email, password…) Displaying form error messages Resetting values Processing form values Find out more about building Ext JS login forms. How can I debug Ext JS apps? Two of the hottest development tools available to any web developer, Visual Studio Code (VSCode) and Google Chrome, seamlessly integrate to provide the most comprehensive debugging environment known to javascript. Gone are the days of console-log mazes – now is the time for stack traces and breakpoints in your javascript development environment. Read on to learn how to efficiently step through your Ext JS application, watch variables, check function scope, and resolve issues faster. Find out more about debugging Ext JS javascript web applications. Are there benchmarks of the Ext JS framework? The overall volume of generated data has grown exponentially over the past couple of decades. As a result, modern JavaScript data grid components that manage the display and analysis of these massive data volumes have evolved. Today, there are many data grid offerings in the market that tout enhanced capabilities to display and manage analysis. But how many of them can withstand the true test of performance as it relates to “Big Data”? Find out more about Ext JS performance benchmarks. How can I use the MVVM pattern with Ext JS? Beyond what the original MVC offers, the Ext JS MVVM pattern allows for further management of the View solely into its own MVC pattern — referred to as the View Package. This consists of: 1) The Model, dealing with the interface of the app’s retrieval and data definition 2) The View addressing strictly presentational concerns such as layout and component configuration 3) The View Model managing the presenting and updating of the data for the View Find out more about js frameworks MVVM patterns with Ext JS. What is the easiest way to build accordions and steppers with Ext JS? Sencha Ext JS allows you to accelerate web application development with an enterprise-ready framework, components and tools built to work together seamlessly. You can build Ext JS applications using drag-and-drop features and spend less time on manual coding. The IDE and Code Editor Plugins integrate Sencha frameworks into your enterprise workflow, enabling code completion, inspection, generation, navigation, refactoring and more. Find […]

January 4, 2022

Everything You Need To Use REST In Your Apps Now

Delphi

What is REST and why should I learn more about it? REST is a type of software architecture that was designed to ensure interoperability between different Internet computer systems. Basically, the idea is that services that comply with REST architecture can more easily communicate with one another whether you are designing mobile apps, Linux, macOS or it purely native windows development. REST stands for representational state transfer and it was proposed by computer scientist Roy Fielding’s 2000 PhD thesis, Architectural Styles and the Design of Network-based Software Architectures, in which he introduced and described REST. The goal of REST is to increase performance, scalability, simplicity, modifiability, visibility, portability, and reliability. This is achieved through following REST principles such as a client–server architecture, statelessness, cacheability, use of a layered system, support for code on demand, and using a uniform interface. Where can I download Roy Fielding’s Original PhD thesis about REST? You can have access to the complete original Roy Fielding’s 2000 PhD thesis here! Since long time ago Mr. Fielding was deeply involved in the web’s early development and standardization, he began working at and for the World Wide Web Consortium in 1994 and co-authored the HTTP 1.0 specification. Later he was the main author behind the HTTP 1.1 and URI specs also co-founded the Apache web server project. The name “Representational State Transfer” is intended to evoke an image of how a well-designed Web application behaves: a network of web pages (a virtual state-machine), where the user progresses through the application by selecting links (state transitions), resulting in the next page (representing the next state of the application) being transferred to the user and rendered for their use. Fielding’s approach was to make sure that the REST architectural style emphasises the scalability of interactions between components, uniform interfaces, independent deployment of components, and the creation of a layered architecture to facilitate caching components to reduce user-perceived latency, enforce security, and encapsulate legacy systems. What do the different REST terminologies mean? REST does not enforce any rule regarding how it should be implemented at lower level, it just put high level design guidelines and leave you to think of your own implementation. What we do have is the definition of 6 architectural constraints which make any web service – a true RESTful API. Client–server: By separating the user interface concerns from the data storage concerns, we improve the portability of the user interface across multiple platforms and improve scalability by simplifying the server components. Stateless: Each request from client to server must contain all of the information necessary to understand the request, and cannot take advantage of any stored context on the server. Session state is therefore kept entirely on the client. Cacheable: Cache constraints require that the data within a response to a request be implicitly or explicitly labeled as cacheable or non-cacheable. If a response is cacheable, then a client cache is given the right to reuse that response data for later, equivalent requests. Uniform interface: By applying the software engineering principle of generality to the component interface, the overall system architecture is simplified and the visibility of interactions is improved. In order to obtain a uniform interface, multiple architectural constraints are needed to guide the behavior of components. REST is defined by four interface constraints: identification of […]

January 4, 2022

The best programming languages to learn in 2022

Noutați

One of the challenges for people pursuing a career in programming is deciding which languages to learn. With so many languages used for different purposes, choosing the ones you want to study will depend on the specialty that most interests you as well as on job demand. A report released on Tuesday by programming course site CodingNomads looks at the “best” programming languages for 2022. If you’re excited by the data and logic side of coding, you may wish to learn Python, Java, C, C++ or C#. If you’re jazzed about visual design and user interfaces, TypeScript might be up your alley. And if you’re looking to develop mobile apps, you’d want to check out Java for Android, and Swift or Objective-C for Apple’s iOS. Aside from satisfying your own professional interests, you naturally want to select a language that’s in demand among employers and promises a good salary. In this regard, CodingNomads examined the most popular languages based on job postings and on salary. Looking at the greatest number of job postings on LinkedIn across the U.S. and Europe, CodingNomads awarded the top spot to Python. In second place was Java, with JavaScript, C++, C#, C, TypeScript, PHP, Perl and Ruby rounding out the top 10. Analyzing the average salaries of the most in-demand languages according to data from Indeed and Glassdoor, CodingNomads put Ruby in first place with an average salary in the U.S. of $111,994. C++ came in second with a salary of $103,818. The other languages and their salaries were Python at $103,540, JavaScript/TypeScript at $100,492, Java at $96,786, C# at $89,203, PHP at $85,435, Perl at $83,159 and C at $82,924. TypeScript was not listed separately because it had limited salary data. But CodingNomads deemed its salary similar to that for JavaScript jobs. Also, these figures are considered average salaries and not what beginning programmers would earn. But successful coders can expect to meet or beat these salaries within a couple of years, according to the report. Python is the best programming languages 2022 As a general purpose, server-side language, Python is used for a variety of tasks from simple scripting to advanced web applications and artificial intelligence. For developers interested in data science or machine learning as well as overall software development and web development, Python is the best language to learn, according to CodingNomads. “While Python has been around for decades, the demand for Python skills in 2022 will continue growing exponentially thanks to its use in the booming industries of data science, machine learning and AI,” said Ryan Desmond, co-founder and lead instructor at CodingNomads. “In addition, Python is considered one of the easiest, most powerful, and most versatile languages to learn, making it popular amongst companies, developers, and aspiring developers.” Java A respected and time-tested language, Java is widely used by organizations around the world. Java is the main language behind Android, which owns an 85% share of the mobile market. It’s also the most popular language for Internet of Things (IoT) devices. Java is considered harder to learn than Python but easier than C or C++, according to CodingNomads. The main reason is that Java improved on C, and Python improved on Java. On the plus side, once you master Java, learning something like Python will be much easier. Anyone who wants […]

December 30, 2021

How To Add A Sepia Image Effect In Your Apps With No Code in C++ Builder IDE

C++ Builder

What is a sepia effect in a C++ app? Is there an easy way to add sepia effects to components? How can I add a sepia effect to alpha images in my applications? How can I use the TSepiaEffect component in C++ Builder? What are the visual tips to add a sepia effect in the development of C++ applications? Let’s answer these questions. C++ Builder IDE is the easiest and fastest C and C++ IDE for building simple or professional applications on the Windows, MacOS, iOS & Android operating systems. One of the greatest features of VCL and FMX UI frameworks are the effects on UI elements. There are many UI effects that can be used on most of the visual elements supported officially by the Embarcadero. There are many good effects that we can use: Sepia Effect, Reflection Effects, Shadow Effects, Emboss Effects, Glow Effects, etc. Let’s see how we can apply a sepia effect to our images in C++ Builder IDE. What is a Sepia Effect? The sepia effect is a tonal editing technique that adds a warmer tone to a given image, so it appears to have a vintage or archival quality. Generally, Sepia effects have good results when used on photos. If you want to add some warmer style to your composition, the sepia effect works exceptionally well with black and white images. With C++ Builder IDE, you can add a sepia effect to your color images by using TSepiaEffect. Let’s see how we can use TSepiaEffect. How to use TSepiaEffect in C++ Builder IDE? TSepiaEffect is a class to create sepia effects for visible objects like images, shapes and similar items. TSepiaEffects affect the texture of visual objects. For further information, go to TImageFXEffect and FireMonkey Image Effects. Using these components, you can apply a sepia effect to screen elements and images with NO CODE at all! The intensity of the sepia color applied over the texture can be set through the Amount property. The following table shows the result of the TSepiaEffect effect on a .png picture, placed on a form (using a TImage object). The default value (Amount=0.5) is used to set the sepia amount. Create a new Multi-Device C++ Builder Project, save all project files in a folder Drag a TImage component from Palette onto the Form, Load an Image by using its MultiResBitmap property Copy and paste this TImage (Image1), position the new one (Image2) to the left Now we have two same Images. Let’s add SepiaEffect to the right one. Drag TSepiaEffect from Palette to the new TImage (i.e.Image2). If you do this it will automatically add Sepia Effect on the new Image with the 0.5 amount which is the default. You can modify the Amount (0 to 1.0) of Sepia Effect from the Object Inspector if you want. Lower values add the lighter amount of sepia effect, higher values have much. The maximum is 1.0. 8. Finally, you can run the application by pressing F9 or Run button, Here is the result. What are some additional tips on adding sepia effects to images at design or run time? You don’t need to use the sepia effect if it is not needed, the simple UI is the best! User images are a good candidate on which to apply the sepia effect, do not use on other components and visual […]

December 29, 2021

Decode barcodes or QR codes from any Delphi app

TMS Software

Just before the year closes, we’d like to share a new episode in the “How it works” series with Holger Flick. This series is created to show you how you can do more with Delphi and TMS components. First Holger introduces two new exciting components added to the TMS FNC WX Pack: the barcode and the QR code decoder components: and of course, the “How it works” video explains in detail how you can create a Delphi application that uses the QR code decoder component and use it to extract information from a QR code image file: TMS FNC WX Pack The TMS FNC WX Pack is all about leveraging existing, reliable, proven web technology in any type of Delphi app, be it a Windows VCL app, a cross-platform FireMonkey app or a TMS WEB Core web client application. It already comes with a HTML editor, a PDF viewer, an OCR component, a JSON formatter and a barcode or QR code generator. In our lab, the next series of breathtaking components are already in development that will join the TMS FNC WX Pack family in 2022! Watch the TMS FNC WX Pack introduction video again for more info. Learn more! Like to learn more about Delphi and TMS components? Consider also the books our colleague Holger Flick wrote for you. Get all the in-depth content on how to get more out of Delphi with TMS components while reading at your own pace. We made a convenient list of the books here from where you can add it to your basket in one-click. Be in touch! 2022 is nearby. Our team is extremely motivated to surprise you once more in the New Year with many exciting new developments. Let us know your wishes for 2022. We are eager to learn what you would like to see us doing in the New Year!

December 29, 2021

What Is The Next Big Thing in Blockchain?

Delphi

Cryptocurrencies like Bitcoin use enormous amounts of energy to secure their network. But why are cryptocurrencies so power-hungry and more importantly what are the alternatives? Much of the hardware used to perform the calculations uses highly specialized computers running Linux collaboratively in “farms” although there are many crypto “mining” apps which are Windows based or uses Windows program development even if their eventual targets are not Windows-based machines. Why is proof-of-work a problem for Bitcoin? Mining new coins take a lot of computing power because of the proof-of-work algorithm. The concept was first presented in 1993 to combat spam emails and was formally called “proof-of-work” in 1997. Nevertheless, the technique went primarily unused until Satoshi Nakamoto developed Bitcoin in 2009. He discovered that this mechanism could be used to reach harmony between many nodes on a network, and he utilized it as a way to secure the Bitcoin blockchain. Yet the proof-of-work algorithm works by having all nodes solve a cryptographic puzzle. This puzzle is solved by miners (the metaphor is drawn from the concept of them extracting their fortunes from hard physical work) and the first one to find the solution receives the ‘miner reward’. This has directed to a situation where individuals are building bigger and larger mining farms in order to share the effort in a “many hands make light work” team effort. The advent of lower cost hardware with a more affordable “bang to buck” ratio – more CPU power for a given financial outlay – coupled with a very broad expansion in the availability of single board mass-produced hardware such as the Raspberry Pi and RISC-powered boards has meant these kinds of mass-computing networks are achievable at a modest level of investment. Bitcoin miners alone use almost 54TWh of electricity, enough to power 5 million households in the US or even power the whole country of New Zealand Will blockchain contribute to global warming? Maybe. Blockchain calculations are shaping up to become a power-suck of worrying proportions. Even accounting for the lower power consumption of modern hardware the sheer computational effort involved and a trend toward coupling dozens, hundreds or even thousands of machines together to obtain the financial rewards which, due to its nature is increasingly hard to obtain and, in the case of Blockchain, harder means more CPU cycles and more CPU directly translates into a greater demand for electricity. According to Digiconomist, Bitcoin miners alone use almost 54TWh of electricity, enough to power 5 million households in the US or even power the whole country of New Zealand. But it does not halt there. It’s currently a simple equation: proof-of-work gives more bounties and thus greater rewards, to people with better and more plentiful equipment. The higher your hash rate (the number of calculations you can perform on the data), the higher the chance that you’ll get to create the next block and obtain the mining reward. To increase the chances even further, miners have come together in what’s called “mining pools”. With mining pools, they combine their hashing power and distribute the reward evenly across everyone in the pool. Proof-of-work is causing miners to use massive amounts of energy and it encourages the use of mining pools which makes the blockchain more centralized as opposed to decentralized. So, to solve these […]

December 27, 2021

Curve Fitting with FNC Math Components

TMS Software

In this article, we’ll show how to implement curve fitting with FNC math components presented in version 3.2 of TMS Analytics & Physics library, most importantly, with little to no code! Curve fitting (approximation) is a mathematical method of finding a math expression (function) that fits best to some discrete data (series of points). Commonly, we need the following three ingredients to implement the curve fitting: Discrete data (a series of points) to fit. A set of functions (basis functions) to construct the curve. A method of solving the fitting problem (optimization algorithm). Let’s go through the FNC components for these three elements. The first component is TFNCDataSource1D. The component provides data for curve fitting and has the following published properties: Data (TDataCollection1D) – a collection of points. Each collection item has two properties of real type: ‘V’ – the value of the variable; ‘F’ – the value of the function. DataCount (integer) – the number of points in the collection (read-only). With standard Delphi IDE tools for collection editing, we can add and delete points, edit values of the points in design time. There is a binding component to show the data on an FNC chart – TFNCData1DPlotter. It has two primary published properties: Data (TFNCDataSource1D) – a data source to show on the chart. Chart – a chart to show the data. When assigning an FNC chart to the Chart property in design time, the plotter component creates a series for the chart. You can tune the series’ properties to get the appropriate data representation. In the picture below, we showed an example of data, drawn with the data plotter. The second ingredient for curve fitting is the set of basis functions. We’ll use the TFNCLinearConstructedBasis1D component. This component provides the easiest way to get a set of functions for constructing the fitted curve. The main published properties of the component are the following Variable (TVariableProperty) – provides the name of the variable for the basis functions. Coefficient (TVariableProperty) – provides the name of the coefficient for the fitting problem. Kind (TBasisKind) – the type of predefined basis functions. Order (integer) – number of basis functions for approximation. Expression (string) – read-only math expression of the constructed function. Parameter (TParameterCollection) – a set of parameter values for parametric basis functions. With the Kind property, you can select the appropriate basis functions for building the fitted curve: polynomials, Taylor series, exponents, Fourier series, exponential functions. The Order property sets up the number of basis functions to build the curve. Here is an example of the component’s properties, shown in the Object Inspector. The last component we need to complete curve fitting is TFNCApproxFunction1D. This component joins a data source with a basis and implements the least-squares approximation algorithm. It has the following published properties: DataSource (TFNCDataSource1D) – a data source for approximation. Basis (TFNCBasis1D) – a basis for approximation. Formula (TBaseFormulaProperty) – read-only formula of the curve. Expression (string) – read-only math expression of the fitted curve. When you assign the data source and the basis properties, the component runs the approximation algorithm and evaluates the formula and the expression properties, as shown in the picture below. The TFNCApproxFunction1D is a descendant of the TFNCBaseFunction1D component. So, you can draw the curve on an FNC chart as described in […]

December 24, 2021

Everything You’ve Ever Wanted To Know About Extjs Examples For Beginners

Sencha

UI development is easier for web developers if they have useful code templates and components to get things done quickly. That is why many web developers are turning to Ext JS, which offers them everything they need. Ext JS is a features-rich and high-performing JavaScript framework developed by Sencha which offers a comprehensive set of components to build stunning web and mobile UIs. Ext JS customizable UI widgets such as calendars, grids, trees, lists, forms, menus, toolbars, windows, etc., let you build cross-platform web and mobile applications. Sencha provides a useful example of various Ext JS capabilities for beginners, and this article explains everything they want to know about Ext JS examples for beginners. How do I build an Admin Dashboard in Javascript? An Administrative Dashboard provides administrators central access to important information and tools that enable them quickly view everything they need at a glance. Ext JS provides a complete and feature-rich administrative application template for you to build a powerful admin dashboard. Users need to download the Ext JS GPL version and Sencha cmd to reuse this template. Users can quickly build the Admin Dashboard sample app and build on top of it customizing the template. How do I build an Executive Dashboard in Javascript? An Executive Dashboard displays company information, including business performance, in an organized manner for company executives. Ext JS provides a responsive executive dashboard template for you to build a user-friendly executive dashboard. Users can quickly build the Executive Dashboard sample app and build on top of it customizing the template. How do I build Javascript Grid Data Binding? Binding data is the process of connecting data to a component. The Grid Data Binding example shows how to bind additional details in a detailed view for the grid upon selecting it. When data we update data, it will update the component configs automatically. Two-way binding allows changes to the config to update associated data. How implement a live-search function for my grid? Live search is important for a table, especially if it contains a large amount of data. The live search grid example shows how you can use ‘LiveSearchGridPanel’ to search the data using a keyword or a character. You can also support searching with a regular expression and case-sensitive search. How do I lock the columns of my grid? Sometimes, you may want to lock specific columns, especially if there are several columns and you need to provide an easy scrolling experience. The Locking Grouping Summary example shows how you can easily move unlocked columns along the visible area. How do I show a calendar in my application? A calendar is a useful component of an application that you can easily show using Ext Js. It is a powerful component of Ext Js Kitchen Sink. The detailed calendar example shows daily, weekly, and monthly calendar views with events. Users can use the Ext Js calendar package, which consists of views based on time frames, And you can implement it with or without a sencha cmd. How to build a ticket application? Ext Js ticket application demonstrates how to build an issue tracking application using MVC and data binding concepts. This example application also shows how to log in and log out using sessions, displays graphics and pie charts of ticket statuses using data […]

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