Today marks the 15th anniversary since .NET debuted to the world. On February 13th, 2002, the first version of .NET was released as part of Visual Studio.NET. It seems just like yesterday when Microsoft was building its “Next Generation Windows Services” and unleashed a new level of productivity with Visual Studio.NET. Since the beginning, the .NET platform has allowed developers to quickly build and deploy robust applications, starting with Windows desktop and web server applications in 2002. You got an entire managed framework for building distributed Windows applications, ASP.NET was…
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It’s a Good Day to Be a C# Developer
Recently at Connect(), Microsoft made a slew of new announcements. First, the public availability of Visual Studio 2017 Release Candidate. This just isn’t a new version of the signature developer tool, it also includes the latest bits for C# 7.0. Second, Google announced they were joining the .NET Foundation. This means that Google, technically a competitor of Microsoft, wants to be actively involved in the evolution of .NET (and indirectly C#). Third, the first public release of Visual Studio for Mac. As a native environment, Visual Studio for Mac will…
Preserve data when deploying Xamarin.Android app
By default all your data from your previous runs is deleted when you’re deploying an Xamarin.Android app. In many cases you don’t want the data to be deleted. Visual Studio To preserve data go to Tools -> Options -> Xamarin -> Android Settings and check “Preserve application data/cache on device between deploys”. Xamarin Studio To preserve data go to Tools -> Options -> Android and check “Preserve data/cache between application deploys”. Happy coding!
Android required permissions
In Visual Studio 2015 if you checked same permissions on your project properties and when reopen it, your checks are disappeared, you have two ways: Is the manifest file marked as ‘read only’ in Windows Explorer? You have to select the Properties directory and un-tick ‘read only’ for the entire folder. Add manually in AndroidManifest.xml file same new rows: <?xml version=”1.0″ encoding=”utf-8″?> <manifest xmlns:android=”https://schemas.android.com/apk/res/android”> <uses-sdk android:minSdkVersion=”15″ /> <application android:label=”$safename$”> <meta-data android:name=”com.google.android.maps.v2.API_KEY” android:value=”yourcode” /> </application> <uses-permission android:name=”android.permission.INTERNET” /> <uses-permission android:name=”com.google.android.providers.gsf.permission.READ_GSERVICES” /> <uses-permission android:name=”android.permission.WRITE_EXTERNAL_STORAGE” /> <uses-permission android:name=”android.permission.ACCESS_FINE_LOCATION” /> <uses-permission android:name=”android.permission.ACCESS_COARSE_LOCATION” /> <uses-permission…
C# 7 Features Previewed
Over the last year we’ve shown you various features that were being considered for C# 7. With the preview of Visual Studio 15, Microsoft has decided to demonstrate the features to make it into the final release of C# 7. Tuple Value Types .NET has a tuple type, but in the context of C# there are a lot of problems. Being a reference type, you probably want to avoid using it in performance sensitive code as you have to pay for GC costs. And as they are immutable, while making…
Customize Json result in Web API
If you work with Visual Studio 2015 and WebAPI, this short post is for you! We have to make our Web API project easy to debug so, I’m going to remove the XML formatter. I’m doing that because I’m in a test project and I’d like to see the response in the browser. The easily way to force the response to Json for all Web API requests is to remove the XML. Obviously you shouldn’t do it in production. Global.asax var formatters = GlobalConfiguration.Configuration.Formatters; formatters.Remove(formatters.XmlFormatter); Now we can start change…
Creating a URL shortener using ASP.NET WepAPI and MVC
In this tutorial, I use several techniques and tools. I use Microsoft Visual Studio 2015 and the latest version of all components. ASP.NET MVC: Microsoft’s modern web application framework. As the name says, it pushes you to use the MVC (model view controller) software design principle. ASP.NET Web API: Web API and MVC are used together in many applications. With MVC, the HTML of the web pages are rendered on the server, and with Web API you can, like the name says, create an API. Web API also uses the…
Implementing the Inversion of Control Pattern in C#
Implement the inversion of control pattern is linked with the Dependency Injection Principle states. Here we analyse a simple implementation
Using iTextSharp to generate pdf file in asp.net
One of the common requirement of web applications is to provide users a way to download some contents. In case of a report, almost all of the reporting tools have the export to pdf kind of function available. But sometime, it is not a report that needs to be generated in pdf. But it could be simple web page or content of a page or sometimes a plain text needs to be generated in pdf format. There are many third party tools are available for this task. We can import…
Universal Windows app samples
On GitHub Microsoft have published a lot of examples for Universal Apps: the link is https://github.com/Microsoft/Windows-universal-samples This repo contains the samples that demonstrate the API usage patterns for the Universal Windows Platform (UWP) in the Windows Software Development Kit (SDK) for Windows 10. These code samples were created with the Universal Windows templates available in Visual Studio, and are designed to run on desktop, mobile, and future devices that support the Universal Windows Platform. Universal Windows Platform development These samples require Visual Studio 2015 and the Windows Software Development Kit…
Enable your device for development
Important Currently you cannot enable devices installed with Windows 10 Insider Preview with the System Setting Developer Mode controls as outlined in this article. This feature is not currently supported, but will be enabled in a future release of Windows 10. So you don’t need to follow the steps in the future approach in this article. But you must follow the links directly below to enable your specific Windows 10 device. Windows 10 Phone: Register your phone to enable developer mode using the existing Windows Phone 8.1 tools Windows 10…
Web.config: encryption and decryption
Introduction In this article I will explain how to encrypt or decrypt connection Strings in web.config file using asp.net. Description In Previous posts I explained lot of articles regarding Asp.net, Gridview, SQL Server, Ajax, JavaScript etc. In many of articles I used connection Strings section in web.config file to store database connection. The connection Strings section contains sensitive information of database connections including username and password of database. Is it secured to store the sensitive information of database connections in plain text files called web.config and machine.config files? If we…
Introducing ASP.NET 5
The first preview release of ASP.NET 1.0 came out almost 15 years ago. Since then millions of developers have used it to build and run great web applications, and over the years we have added and evolved many, many capabilities to it. I’m excited today to post about a new release of ASP.NET that we are working on that we are calling ASP.NET 5. This new release is one of the most significant architectural updates we’ve done to ASP.NET. As part of this release we are making ASP.NET leaner, more…
CoreCLR is now Open Source
We’re excited to announce that CoreCLR is now open source on GitHub. CoreCLR is the .NET execution engine in .NET Core, performing functions such as garbage collection and compilation to machine code. .NET Core is a modular implementation of .NET that can be used as the base stack for a wide variety of scenarios, today scaling from console utilities to web apps in the cloud. To learn how .NET Core differs from the .NET Framework, take a look at the Introducing .NET Core blog post. You can check out the…
C# Extension Method
An extension method has simplified calling syntax. It represents static methods as instance methods. An extension method uses the this-keyword in its parameter list. It must be located in a static class. Example First, here is a custom extension method defined in a program written in the C# language. Generally, you will want to store your extension method class in a separate source file, such as “ExtensionMethods.cs” in your project. Note:This file should store a static class with public static extension methods. Then: In the rest of your source code,…
[A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to… web.config issue
I have a problem like this on server [A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to [B]System.Web.WebPages.Razor.Configuration.HostSection. Type A originates from ‘System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ in the context ‘Default’ at location ‘C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Razor\v4.0_2.0.0.0__31bf3856ad364e35\System.Web.WebPages.Razor.dll’. Type B originates from ‘System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ in the context ‘Default’ at location ‘C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Razor\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.Razor.dll’. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidCastException: [A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to [B]System.Web.WebPages.Razor.Configuration.HostSection. Type A originates from ‘System.Web.WebPages.Razor, Version=2.0.0.0,…
ASP.NET MVC 4 and Entity Framework Database Migrations
ASP.NET MVC 4 was released in beta by the Microsoft ASP.NET MVC Developer Team and it comes with a number of really cool features: Bundling and Minification Support of CSS and JavaScript, Database Migrations using Entity Framework 4.3, Web APIs, Mobile Web with support for jQuery Mobile, Real Time Communication via SignalR, and Asynchronous Support. The Database Migrations using Entity Framework Code-First is really cool and is very much like Rails where you can change your code and then via Package Manager add migrations and update your database as your…
How to create and show an Icon on the Lock Screen in Windows Phone
This article demonstrates how to create / show a lock screen icon that will identify your Windows Phone 8 app on the lock screen. Here are a few quick steps you can follow: Step1. Create a new Windows Phone 8 application project in Visual Studio. Step2. Add a PNG image to your project, that will be displayed on the lock screen. Image requirements: Size: 38 x 38 Type: PNG Colors: The image must contain only white pixels, optionally with some level of transparency Add a sample icon that meets the…
Creare App per Windows Phone 8
Oggi è stato pubblicato il libro di Enrico Rossini Creare App per Windows Phone 8 Concetti di base. Nel mercato degli smartphone è arrivato da qualche tempo il nuovo sistema operativo di Microsoft, Windows Phone, che rappresenta un taglio netto con il passato: nuova architettura, nuova user experience, nuova grafica e anche nuovi strumenti di sviluppo. Con questo libro, partendo dalle basi fino ad arrivare agli aspetti più avanzati, scopriamo tutte le caratteristiche della piattaforma e quali sono gli strumenti che abbiamo a disposizione per creare applicazioni originali e innovative.…
How to create simple Background Agent in Windows Phone
This article provides a minimal example on how to create Background Agents (Tasks) in Windows Phone. There is a more comprehensive example on Dev Center How to implement background agents for Windows Phone. Introduction Windows Phone apps are made dormant when running in the background or when the phone is locked (to conserve device memory and battery life). If your application needs to perform processing when it is (may be) in the background you can use a background agent to run activities according to some schedule. Background agents are…
Make the application loosely coupled
In this series of tutorials, we build an entire Contact Management application from start to finish. The Contact Manager application enables you to store contact information – names, phone numbers and email addresses – for a list of people. We build the application over multiple iterations. With each iteration, we gradually improve the application. The goal of this multiple iteration approach is to enable you to understand the reason for each change. Iteration #1 – Create the application. In the first iteration, we create the Contact Manager in the simplest…
Add form validation ASP.NET MVC
Building a Contact Management ASP.NET MVC Application (C#) In this series of tutorials, we build an entire Contact Management application from start to finish. The Contact Manager application enables you to store contact information – names, phone numbers and email addresses – for a list of people. We build the application over multiple iterations. With each iteration, we gradually improve the application. The goal of this multiple iteration approach is to enable you to understand the reason for each change. Iteration #1 – Create the application. In the first iteration,…
Pro ASP.NET MVC 5
The ASP.NET MVC 5 Framework is the latest evolution of Microsoft’s ASP.NET web platform. It provides a high-productivity programming model that promotes cleaner code architecture, test-driven development, and powerful extensibility, combined with all the benefits of ASP.NET. ASP.NET MVC 5 contains a number of advances over previous versions, including the ability to define routes using C# attributes and the ability to override filters. The user experience of building MVC applications has also been substantially improved. The new, more tightly integrated, Visual Studio 2013 IDE has been created specifically with MVC…
Getting error “The ‘Microsoft.ACE.OLEDB.12.0’ provider is not registered on the local machineâ€
While I was trying to connect to an Access Database from Visual Studio 2010 on my Windows 7 x64 server, I got the following error message, SOLUTION After a detailed research on the above error message, I was able to identify that the 64-bit framework dlls weren’t able to 32-bit versions of the ‘Microsoft.ACE.OLEDB.12.0‘ provider modules. Since I was running Visual Studio on a 64-bit machine, IIS 7 is not (by default) serving 32-bit applications. However, I noticed that the database engine operated on 32-bit. I followed these steps to…
Five documentation apps for .NET developers
Documentation is a necessary evil for software developers. While C# and VB.NET have basic facilities for commenting code and embedding XML documentation into code, turning that into a more useful form is outside the realm of Visual Studio. These five applications can help you turn your comments and notes into proper documentation. 1: Sandcastle Sandcastle is probably one of the best known documentation generators for .NET, and it has the benefit of being open source. Unfortunately, Sandcastle is difficult to use on its own, prompting a small cottage industry…
