Friday, September 27, 2013

What’s New in Objective-C and Foundation in iOS 7

Objective-C is the most common language for developing iOS and OS X apps. Sure, you can use third party frameworks that allow you to develop apps using other languages such HTML & Javascript or C#, but if you want to write blazingly fast, super efficient native apps then you need to use Objective-C. Foundation is one of the core frameworks that you'll use when developing Objective-C applications. As an iOS developer, it's critical to keep up-to-date with the latest advances in Objective-C and Foundation – and in iOS 7, there are some important changes you need to know about. In this article, you'll take a quick tour of some of the new features in Objective-C and Foundation. Note that this is an article instead of a tutorial – you'll get a quick crash course of what's new (with some code snippets along the way), so you can get up-to-speed as quickly as possible.


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Wednesday, September 25, 2013

#VisualStudio 2013 and WP app development

Visual Studio 2013 Preview is already here and many of you already downloaded it and started exploring the new features and enhancements introduced in this version. Few people asked me that, they are not able to build Windows Phone 7 applications in Visual Studio 2013 even after installing the WP7 SDK. So, what is the issue? How can we build Windows Phone application that targets OS 7? This short post is for those developers who are seeking this information.


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Tuesday, September 24, 2013

#VisualStudio 2013 Improvements - better commenting in XAML

Microsoft Visual Studio 2013 RC (Release Candidate) is already there and I hope, many of you already downloaded it and started exploring the new features and enhancements part of the release candidate. Visual Studio 2013 provides us a better way to handle XAML pages. In this blog post, we will learn the new feature introduced to better commenting XAML codes inside Visual Studio 2013 IDE. You will definitely like it. In Visual Studio 2012 or earlier versions while working in the XAML pages, it was not so easy to comment a block of XAML code having one or more commented block. In such case, we had to either remove those commented blocks first or find out the individual section to comment it. If you already worked with XAML codes, you will understand how difficult it is. But in Visual Studio 2013, Microsoft improved the editor to keep away the frustration of the XAML designers commenting out the code block. Have a look into the below video to know how easy it is...


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List Filenames With Extension

This example will show how list file names with specified extension in android. Algorithm: Create a new project by File-> New -> Android Project name it ListFilenamesWithExtension. There must be some files on sdcard to show on list. Run for output. Steps: Create a project named ListFilenamesWithExtension and set the information as stated in


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Dynamic Spinner

This example will show how to create spinner with list view at run time in android. In this example you will be able to assign the contents of a spinner to another spinner at run time on a button click. Algorithm: Create a new project by File-> New -> Android Project name it DynamicSpinner


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Auto Scroll Text View

This example will show how to set auto scroll in text view in android. Algorithm: Create a new project by File-> New -> Android Project name it AutoScrollTextView. Write following into main.xml: Run for output. Steps: Create a project named AutoScrollTextView and set the information as stated in the image. Build Target: Android


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XamDockManager - Data Binding ContentPanes with MVVM

If you are using the Infragistics xamDockManager control and using MVVM to compose your views, then you have probably asked yourself the question, "How do I data bind a collection of objects, which represent my Views, from my ViewModel to various areas of the xamDockManager?". You are asking yourself this question because the xamDockManager doesn't support this data binding out of the box. The good news is that this is relatively easy to accomplish. You just have to write a little code. As with most solutions, there are always more than one way to solve a problem. There are actually solutions to this specific problem that have already been posted. For example, this post titled "ItemsSource for xamDockManager", provides an alternative to the solution I am going to show you. So why am I showing you another approach? Well, I prefer something a little more simple and straight forward. You can choose which solution you prefer.


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20 Adobe Photoshop Plugins that You Might Want to Download

Let's face this fact: Photoshop is still the number one design tool that a designer should master. The mastery of Photoshop will always be tantamount to the learning of other Adobe software programs. Personally, I consider Photoshop as the mother of all Adobe platform software collection. It is versatile and jam-packed. Everything you need (well, almost all) is in there. You just have to stretch your creativity a wee bit. But being imperfect too, Photoshop has its limits at times. Sometimes, it cannot seem to perform the way we want it to be. Designers often have problems with Photoshop functions that are non-existent. This predicament calls for additional software. So what designers do is search, download and open another software just to fit the needs of their imagination. This, I think, might cause some time. And for a designer, time is always of the essence. With this, it is very advantageous to have just one software that could cater to all the needs.


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Android SDK: Drawing with Opacity

This tutorial demonstrates how to allow users to draw with opacity values. While this post builds on related tutorials published on Mobiletuts+, you can dive straight into this lesson without completing the prior posts. Read on! The Android platform provides the resources to create drawing functionality using touchscreen interaction. In a prior Mobiletuts+ series on Creating a Drawing App, we worked through the essential features of drawing interaction in Android, including selecting from a color palette and choosing brush sizes. In this tutorial, we will focus on how to enhance a drawing application by adding opacity into app drawing functions. You can complete this tutorial without having completed the related posts, but we will reference some of the prior material throughout.


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30 Days of TDD: Day Two – A Review of Object Oriented Principals

In today's post I'll be doing a quick review of principals of Object Oriented Programming (OOP). This post will help frame future posts in this series by ensuring that we are all on the same page in terms of our understanding of software development. Even if you are seasoned developer I recommend that you at least read the section on Polymorphism and Interfaces as these topics are widely misunderstood and are crucial to building good TDD practices.


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What is ViewData?

What is ViewData? Introduction This article demonstrates one of interesting and most useful concept in ASP.NET MVC. Question: What is ViewData? In simple terms "ViewBag is the data holder which enables to define a key-value pair and hold the data which can be passed from controller to view". Step 1: Create a new ASP.NET MVC application


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Creating Titanium Mobile Modules Using CommonJS

In this article we'll be discussing how to create your own mobile modules for Appcelerator's Titanium using just JavaScript and a bit of CommonJS knowledge. The module we'll be creating will be one for Picasa, Google's image service, and will allow our users to view albums and photos from Picasa without knowing any details about the Picasa API itself. Once we've tested our module, we will also run through packaging it for both iOS and Android!


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Collapsable Table View for iOS

was once working on an iPhone application that shows a large number of inputs, grouped into various categories, in a UITableView. To change the value of one of the inputs, the user presses the corresponding row in the table view and alters the value in a separate screen that appears. The table view had a section for each category and each section contained a table cell (row) for each input. The problem was that the number of inputs became very, very large so that it didn't give the user a very good overview. It was even tedious to scroll from the top of the table to the bottom. We decided that the user should be able to collapse and expand the sections (categories) of the table by simply pressing the header of the section. We required that the code that achieves this should be reusable and that it requires the least possible number of changes to the existing code.


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AngularJS Tutorial: Learn to Build Modern Web Apps

This tutorial will guide you through the process of creating a full-stack application. It features step-by-step instructions on how to build a fantasy football application, code snippets of the full application, and explanations on design decisions. Our intention is to provide the AngularJS community with instructions on how to use AngularJS correctly and effectively, but also in its most modern form. The application you are building will go beyond basic use of AngularJS, and we will attempt to explore as much of the framework as possible. We also feel strongly about maintaining modernity in a tutorial, so we will keep it congruent with AngularJS as the framework and community matures. This tutorial is built on top of AngularJS v1.2.0rc1. The tutorial is a living thing, a work in progress. We are constantly extending the tutorial and making changes and corrections. If you find errata, think something should be changed, or would like to suggest an improvement or new section, we would love to hear from you.


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jQuery Check if String Contains Specific Word in JavaScript

Introduction: Here I will explain how to use jQuery to check particular word in string in JavaScript or jQuery to check if string contains specific word in JavaScript. Description: In previous articles I explained jQuery add border to images in webpage, jQuery show loading image in pageload, jQuery hide div elements after 5 seconds, jQuery convert am / pm time to 24 hours time,


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Accessing Google Services Using the OAuth 2.0 Protocol

The OAuth 2.0 protocol provides a simple and secure standard that allows third-party applications to access major service providers like Facebook, G+, and Twitter without compromising user passwords. The whole idea revolves around the existence of an access token, something like a unique key that can identify a user in place of a password. Access tokens are obtained by third-party applications after the user successfully authenticates with a web service. The whole process, known as authorization flow, begins when a user enters his credentials into a login window and finishes when the access token is acquired. The access token is usually refreshed from time to time. With this token, there is no need for any of the user's personal data or password to be transmitted over the web each time that a client application asks for access on behalf of the user.


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Using Telerik OpenAccess ORM with ServiceStack

In this post we will guide you in using Telerik OpenAccess ORM together with ServiceStack to achieve a powerful and flexible Service-Oriented Architecture.


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30 Days of TDD: Day Three – Your First Test

In this post I will introduce you to JustCode and the NUnit testing framework. I'll also demonstrate the basic TDD workflow from introduction of the first requirement all the way through to writing your first test. At the end of this post you will have a test based on a given requirement. In the next post we will work through the rest of the workflow and make the test pass.


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iOS Core Data Tutorial With Example (Part -2)

This is the Second Tutorial in series of iOS Core Data With Example. In the first tutorial we learnt how to save and fetch data in iPhone apps and manage their relationships. In this tutorial we will...


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WCF Self-Hosting multiple bindings

When building WCF Services there is this point when you have to make a critical decision: Which binding is the best for you service? Windows Communication Foundation comes with several different bindings, each of those created for specific situations and requirements. Here are some of the most used bindings with some of their characteristics as well:


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Design responsive web sites using CSS3 Media Queries and HTML5

Responsive web design is used to design websites for different access device resolution and size. Yourweb site will be accessed by desktop, tablets, smart phone devices (Android, IOS) etc. Each device will have a different screen size. If your website needs to adapt for all those device sizes and have good look and feel, you need to design your sites to be responsive using Responsive Web Design.


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Creating Reusable Page template

When developing any web application we most of the times use the built-in Web Form that's with the Visual Studio. But What if we want to have a Web Form that we will design as we want and keep it as a template for reuse. So lets do something like that by following the steps below.


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A Book Store Application Using AngularJS and Asp.Net Web Api

This application demonstrates how to use Asp.Net Web API RESTful services to send and receive data with angularJS. Apart from that you can see how angularJS is very effective in creating applications where we need to do real-time DOM manipulation. Also this is a single page application which utilizes angular views to navigate to different pages. This application does not contain any kind of user management or any payment processing system as this is outside the boundary of the scope of this article, but you can implement them easily enough if you want to by modifying the existing code. This application uses a modified version of ToolTipJS which is a small javascript library to implement tooltips for web page elements. I have already covered that here.


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Learn how to use the built-in Xcode features to localize your apps

This week let's talk about localization. In brief, localization is a process to adapt a product to a particular language. Not all iPhone users are English-speaking. If you just release your app in English, it may be ignored by user from other parts of the world. In this tutorial, we will go through the localization process with you. You'll see how easy you can localize an app and make it available in multiple languages by using the built-in function of Xcode and iOS API. Go ahead to check out the new tutorial:


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DataGrid View with Sorting and Paging using Dojo EnhancedGrid, JsonRest Store, Entity Framework, SQL Server, ASP.NET MVC Web API

Dojo Toolkit is an open source modular JavaScript library (or more specifically JavaScript toolkit) designed to ease the rapid development of cross-platform, JavaScript/Ajax-based applications and web sites and provides some really powerful user interface features (Dojo Toolkit). One of the most powerful Dojo tools is DataGrid (DataGrid demo). In Dojo DataGrid article, I showed you how to use Dojo DataGrid in an MVC project and there, I said that "we need a full article to talk about sorting and paging". Here you are. This article walks-through the process of creating an EnhancedGrid supporting Paging and Sorting. For making this kind of grid, we will use Dojo EnhancedGrid, Entity Framework, SQL Server and ASP.NET MVC Web API.


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A better switch with Lambdas in .NET, Part 4 (Working with Types)

When dealing with the new Switch case constructs, I always wanted to add more to it. After adding things to it like, replacing the previous switch /case with lambdas, then adding a StringComparer and then adding IComparer, I thought let us add something really useful to it. The switch with Types is always one might have wanted with traditional switches. Here is an implementation of Switch/Case constructs using lambdas to enumerate type of an object.


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SQL Server - Acid Properties (Atomicity, Consistency, Isolation, Durability) Example

Introduction: Here I will explain SQL Server ACID properties those are Atomicity, consistency, isolation, durability with Example. Description: In previous post I explained SQL Server show time difference in minute ago, hour ago, day ago, Difference b/w view & stored procedure in SQL, Difference b/w char, varchar and nvarchar in sql server, substring function in SQL server. Now I will


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Group Columns in Asp.net Gridview Header Row & Display Multiple Columns Under Single Column

Introduction: Here I will explain how to group columns in asp.net gridview header row in C# and VB.NET or show multiple columns under single column in asp.net gridview. Description: In previous articles I explained Show Gridview row details in tooltip, Show tooltip for gridview header columns, jQuery change tooltip style in asp.net, Add tooltip to dropdownlist items in asp.net, Create


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iOS SDK: Working with Google Calendars

The app we'll build in this tutorial is going to let users get connected to their Google account, download their calendars, and create a new event with a description and a date/time. The new event will be posted to a calendar that the user selects. Regarding our app structure, the basic view is going to be a table view that will contain three sections for setting the following data:


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Understanding (and testing for) view state MAC in ASP.NET web forms

Remember view state? For that matter, do you even remember web forms?! I kid because although MVC is the new hotness in the world of building ASP.NET websites, web forms remains the predominant framework due to both the very long tail of sites already built on it and the prevalence of developers with skills in this area who haven't made the transition to MVC (indeed some people argue that they can happily cohabit, but that's another discussion for another day). Anyway, back to view state. When we entered the world of .NET more than a decade ago now, view state was the smoke and mirrors that turned that stateless HTTP protocol into something that actually persisted data across requests entirely automagically. If, like me, you'd come from a classic ASP world you would have been used to a lot of plumbing going into passing data between requests and manually binding it back up to HTML controls to create the veneer of persistence. View state also made for a much lower friction transition process for folks moving from a win forms world where these problems of persistence didn't exist like they do in the web world. Ok, it could get out of control very quickly and many people bemoaned the (often hefty) overhead it could put on page and request sizes, but it served it a purpose. But there's one thing about view state that I suspect many people don't know and even if they've messed with it before, may not understand the consequences: MAC. This is actually a very important feature of view state and misusing it can not only leave you vulnerable now but you may very well find it becomes a breaking change in future versions of ASP.NET. Let me explain what it is, why you need it and how to test whether it's been disabled on a site.


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Console.WriteLine or ‘cw’ – Which one do you prefer ?

Few days back we have discussed about some of the hidden and very useful code snippet of visual studio, 'propfull – for property and backing field' and 'forr' code snippet for reverse 'for' loop. Many of you have found them very useful and thanks for sharing the feedback. Today you will learn another interesting code snippet, called'cw'. Well, it looks like very small or something silly, but to be honest it is not. While writing any code in the console application, to print any output, we used Console.Writeline, and you can guess the number of frequency of using it. 'cw' is the code snippet for Console.WriteLine().


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Create a simple Todo App with JavaScript UI library Webix

Webix is mostly a UI framework, it is oriented for usage in complex client side apps with a lot of controls and complex business logic. At the same time, it can be effectively used for solving common tasks without the necessity of learning any third party libraries. Let's check these Webix features by creating a simple "ToDo" app. The ToDo App is like a "Hello World" for frameworks. It is the basic app, which shows how the main functionality of the framework can be used.


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Challenges & solutions - Architecture of a Modern Web Application - Part 1

This article is about popular challenges in web application development and their solutions. Modern web applications could easily be decomposed in two distinct code bases. One that runs on server infrastructure and the other that runs on end user devices. The server infrastructure could be as big as over 49,293 servers in just one Google data center and could be as small as a website hosted on company's internal web server.


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Responsive Web Design with jQuery Mobile

Over the last few years the devices used to access web applications have grown like anything. We now have mobiles, tablets, desktops, laptops, TV etc. that can be used to access a web site. These all devices vary a lot in sizes. Writing individual applications to cater to all of these different sized and variety of devices is nearly impossible. So we need to design web sites in way that they adjust to the screen size on which they are displayed. The technique developed to solve this problem is Responsive Web Design. Responsive web design is a series of techniques and technologies that are combined to make delivering a single application across a range of devices as practical as possible. Below is an example of how Google news site looks on different devices.


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30 Days of TDD: Day Four – Making Your First Test Pass

In the previous post I discussed the tools I will be using in this series; Visual Studio 2013 Preview as my development environment, NUnit as my unit testing framework and JustCode as my test runner. I also introduced a requirement and wrote my first test to capture that basics of that requirement. In this post I'll demonstrate one of the most important concepts about TDD by writing just enough code to make the first test pass. I'll then add more tests to introduce more functionality to our library.


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Monday, September 23, 2013

C# - Difference b/w Virtual Override New Keywords with Example

Introduction: Here I will explain difference between virtual override and new keywords in c#.net or virtual, override and new keywords example in c#.net. Description: In previous posts I explained method overloading and overriding, delegates example in c#, sealed class in c#, using statement in c#, OOPS examples in c#, difference between wcf and web application, interview questions in


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Sencha Touch 2: Add spinner field with increment/decrement value

As requested by one of my reader, today we are going to see how to add Spinner form field (Ext.field.Spinner) in Sencha Touch 2. Also we are going to see how to apply increment/decrement values by clicking '+' and '-' icons in the Spinner Fields


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Detecting whether a device supports orientation changes

To determine whether a device supports orientation changes–that is landscape, portrait, landscape-flipped, and portrait-flipped orientations–the simplest way is to just check whether an orientation sensor exists. Call Windows.Devices.Sensors.SimpleOrientationSensor.getDefault() and if the return value is non-null, there is an orientation sensor.


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How to calculate distance between two coordinates in WP8?

Sometime while working with map control in Windows Phone, we may need to calculate distance between two GeoCoordinates. The Windows Phone 8 SDK already provides you the required API for you to calculate the distance very easily. If you are looking for a piece of code to do the same, here is the small post for you to understand the API and the way to use it in your app.


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