Working with Radio Button control and Image in Silverlight 3.0

Objective

In this article, I will explain couple of things step by step

1. How to work with Radio Button control of Silverlight 3.0
2. How to Rotate Image in Silverlight

Expected Output




On selecting Radio Button Image will rotate in some angle.






Procedure

Create a Silverlight application by File -> New -> Project -> SilverLight then selecting Silverlight Application project template.



Host the SilverLightApplication1 in Web Application



Design the Silverlight page. Add Radio Buttons as shown below

MainPage.Xaml

<UserControl xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"  x:Class="SilverlightApplication1.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:DesignWidth="640" d:DesignHeight="480">
    <Grid x:Name="LayoutRoot" Background="Azure">
        <Grid.RowDefinitions>
            <RowDefinition Height="400"/>
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Image x:Name="imgToDisplay" Height="400" Width="300" Source="a.jpg"  Grid.Row="0"/>
        <StackPanel Orientation="Horizontal" Grid.Row="1">
            <RadioButton x:Name="rdBtnLeft" Content="Left" Click="rdBtnName_Click"   HorizontalAlignment="Right" />
            <RadioButton x:Name="rdBtnRight" Content=" Right" Click="rdBtnName_Click"  HorizontalAlignment="Right"/>
            <RadioButton x:Name="rdBtnUp" Content="Up" Click="rdBtnName_Click"   HorizontalAlignment="Right"/>
            <RadioButton x:Name="rdBtndown" Content="Down" Click="rdBtnName_Click"   HorizontalAlignment="Right" />
            <Button x:Name="btnRotate" Content=" Rotate" Click="btnRotate_Click" HorizontalAlignment="Center" Height="65" Width="100"  />
        </StackPanel>     
    </Grid>
</UserControl>

Code Behind

1. Add same event for click on all radio buttons.
2. In the click event of radio buttons, I am assigning sender's name and checking it in a switch case.
   
   string radioButton = ((FrameworkElement)sender).Name;
   switch (radioButton)
   {
   }
3. Rotation of image is being performed by RotateTransform class.
   
   RotateTransform rotate = new RotateTransform();
4. In click event of Button we are checking radio button's isChecked property. If IsChecked is true for a radio button it means that radio button is selected.
   
   if (rdBtnLeft.IsChecked == true)
   {
   }

MainPage.Xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace SilverlightApplication1
{
    public partial class MainPage : UserControl
    {
        int parameter = 0;
        public MainPage()
        {
            InitializeComponent();
        }
        private void rdBtnName_Click(object sender, RoutedEventArgs e)
        {
            RotateTransform rotate = new RotateTransform();
            string radioButton = ((FrameworkElement)sender).Name;
            switch (radioButton)
            {
                case "rdBtnLeft":
                    rotate.Angle = 30;
                    imgToDisplay.RenderTransform = rotate;
                    break;
                case "rdBtnRight":
                    rotate.Angle = 45;
                    imgToDisplay.RenderTransform = rotate;
                    break;
                case "rdBtnUp":
                    rotate.Angle = 60;
                    imgToDisplay.RenderTransform = rotate;
                    break;
                case "rdBtndown" :
                    rotate.Angle = 360;
                    imgToDisplay.RenderTransform = rotate;
                    break;
            }
        }
        private void btnRotate_Click(object sender, RoutedEventArgs e)
        {
            RotateTransform rotate = new RotateTransform();
            if (rdBtnLeft.IsChecked == true)
            {
                rotate.Angle = 30;
                imgToDisplay.RenderTransform = rotate;
            }
            else if (rdBtnRight.IsChecked == true)
            {
                rotate.Angle = 45;
                imgToDisplay.RenderTransform = rotate;
            }
            else if (rdBtnUp.IsChecked == true)
            {
                rotate.Angle = 60;
                imgToDisplay.RenderTransform = rotate;
            }
            else
            {
                rotate.Angle = 90;
                imgToDisplay.RenderTransform = rotate;
            }
        }
    }
}

Conclusion

In this article, I explained how to work with Radio Button control of Silverlight. I also explained how to rotate image in silverlight. Thanks for reading .