Silverlight WebCam Application in VB.NET

In this article you will see how to create an simple Silverlight WebCam Application.
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 Silverlight WebCam: One of the new features in Silverlight 4 that I'm excited about is the support for webcams and microphones. There are several ways to interact with the WebCam, but i'll start with the most simple.  I've written a simple demo that you can download here that will let you start the WebCam, take a snapshot from the WebCam and save it out as an image:

Below given example is a simple Webcam application, it could be expanded to do more as the CaptureSource can be used to take screenshots from the Webcam using the "AsyncCaptureImage" method.

Example of Silverlight WebCam

<UserControl x:Class="SilverlightApplication8.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400"> 
    <Grid x:Name="LayoutRoot" Background="White">
        <Button Content="Click" Height="23" HorizontalAlignment="Left" Margin="26,12,0,0"Name="Button1"
 VerticalAlignment="Top" Width="345" />
        <Rectangle Height="257" VerticalAlignment="Top" Margin="12,41,12,0">
            <Rectangle.Fill>
                <VideoBrush x:Name="Display" Stretch="Uniform"/>
            </Rectangle.Fill>
            </Rectangle>
    </Grid>
</
UserControl>

//MainPage.xaml.vb Code

Partial Public Class MainPage
    Inherits UserControl
    Private Source As New CaptureSource
    Public Sub New()
        InitializeComponent()
        Source.VideoCaptureDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice()
        Display.SetSource(Source)
    End Sub

    Private Sub Button1_Click(ByVal sender As System.ObjectByVal e AsSystem.Windows.RoutedEventArgsHandles Button1.Click
        If CaptureDeviceConfiguration.AllowedDeviceAccess OrCaptureDeviceConfiguration.RequestDeviceAccess() Then
            If Source.State = CaptureState.Stopped Then
                Source.Start()
            Else
                Source.Stop()
            End If
        End If 
    End 
Sub
End Class

Output Window

2.gif
 

Conclusion

Hope this article would help you to understand how to create an simple Silverlight WebCam Application.

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