Tuesday, January 5, 2010

Creating Hello World application with Silverlight 3.0 with Visual Studio 2010

Silvelight is latest buzz in Microsoft.NET Technologies. Silverlight enable us to create rich user interface for the web based application. Let create a simple application to understand how Silverlight application works.

We will start creating application with file menu –> New Project –>Silverlight application a dialog for silverlight application will open like following.

Hello Word application by silver light 3.0

Once you create a Silverlight application a new dialog will open to create a website which will host Silvelight application like following.


This website are used for hosting Silvelight application. Please note that Silverlight application can also run with simple html file also. After clicking on Ok it will create a simple project like following in solution explorer.

Solution Explorer,Silver Light 3.0,ASP.NET 4.0

Now let's Create a simple button and on clicking on that button will print “Hello World” on screen.With Silvelight used Microsoft new UI Language called XAML which used to define the object in the SilverLight.

Once we create a silvelight application which will create a MainPage.xaml and MainPage.xaml.cs file for the same. It will create by default XAML like following.

<UserControl x:Class="MySilverLight.MainPage"
d:DesignHeight="300" d:DesignWidth="400">

<Grid x:Name="LayoutRoot" Background="White">

Here grid will be act as container like as we are using content pane in our asp.net application. Which can host the another objects like button text and other objects. Now I am creating a simple hello world button via adding following xml between <Grid> and </Grid> tag.
<Button x:Name="HelloWorldButton" Content="Push to print Hello World on Screen " Height="25" Width="250"></Button> 

Here x:name is name of button and content is text that will display on button,width will specify width of button and height will specify height of button. It will create a simple button like following in the design layout of silverlight application as following.

SilverLight 3.0,

Now let add a text block object which will print the Hello world text on the screen after clicking button with following XAML.
<TextBlock x:Name="Mytextbox" Text="Print Text" Height="25" Margin="75,197,92,78"></TextBlock>
Which will create a text block just below the button like following. Here margin will define the margin from four side just like html. Text block will behave just like label in asp.net application

TextBlock, SilverLight Button, Silverlight 3.0

After that Let’s add a add a click event to button via modifying existing XAML like following .
<Button x:Name="HelloWorldButton" Content="Push to print Hello World on Screen " Height="25px" Width="250px" Click="HelloWorldButton_Click" ></Button> 
It will create a click handler for the button we have added after then we can add code to print Hello World!! to event handler we have just create like following.
private void HelloWorldButton_Click(object sender, RoutedEventArgs e)
Mytextbox.Text = "Hello World!!!";
Now compile and run the application it will open a browser and once you click the button it will print a hello world!! text like following.

Silverlight in Browser,SilverLigh Helloworld

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Saturday, January 2, 2010

The operation could not be completed. Class not registered- Visual Studio 2010 Express edition beta2.

My operating system was crashed so i have again downloaded and installed Microsoft Visual Studio 2010 Express edition beat 2. But when i was trying to create a web application then i got the error message that “The operation could not be completed. Class not registered.” Other projects were working fine and I am able to create asp.net website. After doing searching for sometime the i found following link.


From that i found that it was Microsoft SQL Server Express edition that is creating problem. I had installed Microsoft Visual Studio IDE not the SQL Server Express 2008 edition. So i have installed SQL Server Express Edition 2008 and now its working fine. But it is very strange that i can not create a web application project with out installing it.

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Happy New Year 2010- From the writer of DotNetJaps

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I wish happy new year 2010 to all my readers.I know that this blog has been quite from last 1 or 2 month but i was busy with professional end as well as my computer operation system was break so it was long process to get my all data back and having reinstalled all the software and other thing i need but i promise you that i will post all the new latest thing asp.net 4.0,Microsoft SQL Server 2008, Silver light and other latest Microsoft Technologies that I am going explore in this new year so you will going hear at least one post week from this blog.

Once again I am wishing you a very happy and phosphorus new year to all of you.

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