Google SubramanyamRaju Xamarin & Windows App Dev Tutorials

Monday, 10 March 2014

Not Enough Memory Error Message: Windows 8 Phone Emulator Not Starting in Windows 8.1

Introduction:

The Windows Phone 8 Emulator does not start on a computer that is running Windows 8.1 and that has fewer than 8 gigabytes (GB) of RAM if many programs are running at the same time. Additionally, you receive the following error message:

"The Windows Phone Emulator wasn't able to ensure the virtual machine was running:
Something happened while starting a virtual machine: 'Emulator Name' could not initialize. (Virtual machine ID GUID)
Not enough memory in the system to start the virtual machine Emulator Name with ram size 1024 megabytes. (Virtual machine ID GUID)"

Running the Windows Phone Emulator on Windows 8.1 Preview

With Windows 8.1 Preview now available, we would like to highlight a compatibility issue with the Windows Phone Emulator included in the Windows Phone SDK 8.0. When you start the Windows Phone 8.0 emulator in Visual Studio 2012 on Windows 8.1, the following dialog may appear to indicate a compatibility issue:

Tuesday, 4 March 2014

Now Direct Facebook Login Support available With Windows Phone 8 C#

Introduction

Facebook Login provides a fast and secure sign up experience across web, iOS, and Android apps. However, Microsoft is adding official support for Facebook Login in Windows 8 and Windows Phone 8 appsin partnership with Facebook. Facebook Login for Windows 8 is ready to use in production apps, while Windows Phone 8 support is being launched in beta.
So that as a developer part,Not only does Facebook Login reduce the amount of code you need to write for your app to log in to Facebook, it also improves the user experience by not requiring the user to log in again if they are already logged in to the Facebook app.

Friday, 28 February 2014

Top Windows Phone interview questions c# - Part2

Introduction:

 In previous article  i was posted the nearly 67 interview question about windows phone and c#.net. Because it is good practice for knowing generic questions about c#.net which is related to windows phone development.However in this post i am going to introduce most of questions related to windows phone.So that lets continue with part-1 post questions

Thursday, 27 February 2014

How to display the photo of a contact from Windows Phone C#

Introduction

In some time we may need to get phone contact list images and then display in our images.So that we need to know about Contact object,which contains all available information about an individual contact.However it is a process of create a new bitmap image, set its source to GetPicture, and then display the bitmap in the user interface with reference to Contact object.

Wednesday, 26 February 2014

Formatted text in a TextBlock in Windows Phone C#

You can also display a series of strings in a TextBlock, where each string has a different formatting. You can do this by using a Run element to display each string with its formatting and by separating each Run element with a LineBreak element.
The following XAML shows how to define several differently formatted text strings in a TextBlock by using Run objects separated with a LineBreak.

Monday, 24 February 2014

Top Windows Phone interview questions c# - Part1

                 Windows Phone Basic Questions
1. LifeCycle Of WindowsPhone:
  App Launching=>Running=> OnNavigatedFrom(NavigationEventArgs)=>deactivated=>dormanent (stopped and no processing takes place)=>tombstoned(app has been terminated and it will be relaunched and the application can use the preserved data to restore state) =>Activated=> OnNavigatedTo(NavigationEventArgs) =>Closing=>raised when the user navigates backwards past the first page of an app

Tuesday, 28 January 2014

Coding4Fun:SuperImage Bindind Listbox with more Captured Images without out-of-memory -Part 2

Introduction

In Previous Part1 article we can resolve memory issue with listbox images,but unfortunate there is an issue In Listpage.xaml ,Because listbox Ui loads little bit slow when there are more caprtured images.The reason is in MainPage i was storing whole caprured imagesbytes in isolated storage and readed it on Listpage.xaml,it is little bit more complex for loading UI when reading whole captrured  imagebytes.
So that in this part i am going to introduce best solution is,Direclty reference the isostore image path instead of storing and reading whole image bytes using Coding4Fun Toolkit: Introducing SuperImage .

Monday, 27 January 2014

Windows Phone 8 Listbox Images out of memory exception c# - Part1

Introduction

Images are the best attraction for every mobile app.But Users have high expectations when it comes to using applications on their mobile devices. It is important to have good performance and quality in your applications and there are a number of things you can do to deliver great performance.So as s developer it is more quit difficult to overcome out of memory exception,however I’ll list a few that apply to memory, images, data binding and more.and i hope i will definately helpful for who are having same problem.

Monday, 6 January 2014

How to store ListBox items into IsolatedStorage in WindowsPhone 8 c#

Introduction

In every mobile app,there is requirement for storing data and accessing data. We need to store data in our Phones to persist data when the application is not running.However fortunatley Windows Phone 7 &windows phone 8 provides a secure way to store data into Isolated Store.Isolated Storage, as the name suggests is a special virtualized file system that every application can access for standard IO operations yet the file is unavailable to any other application. Hence the files stored by one application is isolated from another. 
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