Get Icon From FileName in WPF

In this article we will see how we can convert a filename to Icon.


Introduction

In this article we will see how we can convert a filename to Icon.

Creating WPF Project

Fire up Visual Studio 2008 and create a new WPF Project. Name it as GetIconSample.

FileNameWPF1.gif

Here is the idea what we are going to do for our application; we would browse for adding files to our ListBox. ListBox would display the File Icon and File Name.

The following image what we discussed above.

FileNameWPF2.gif

First of all we would write a class that would convert FileName to Icon. To achieve this we need to refer the System.Drawing Namespace.

FileNameWPF3.gif

The following code is the FileToImageIconConverter

#region FileToImageIconConverter
    public class FileToImageIconConverter
    {
        private string filePath;
        private System.Windows.Media.ImageSource icon;

        public string FilePath { get { return filePath; } }

        public System.Windows.Media.ImageSource Icon
        {
            get
            {
                if (icon == null && System.IO.File.Exists(FilePath))
                {
                    using (System.Drawing.Icon sysicon = System.Drawing.Icon.ExtractAssociatedIcon(FilePath))
                    {
                        icon = System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
                                  sysicon.Handle,
                                  System.Windows.Int32Rect.Empty,
                                  System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
                    }
                }
 
                return icon;
            }
        }

        public FileToImageIconConverter(string filePath)
        {
            this.filePath = filePath;
        }
    }
#endregion

Now we will create a simple class that would contain the Properties as FileName, FileIcon.

#region FileToImageIconConverter
    public class FileToImageIconConverter
    {
        private string filePath;
        private System.Windows.Media.ImageSource icon;
 
        public string FilePath { get { return filePath; } }

        public System.Windows.Media.ImageSource Icon
        {
            get
            {
                if (icon == null && System.IO.File.Exists(FilePath))
                {
                    using (System.Drawing.Icon sysicon = System.Drawing.Icon.ExtractAssociatedIcon(FilePath))
                    {
                        icon = System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
                                  sysicon.Handle,
                                  System.Windows.Int32Rect.Empty,
                                  System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
                    }
                }
 
                return icon;
            }
        }

        public FileToImageIconConverter(string filePath)
        {
            this.filePath = filePath;
        }
    }

#endregion

The following XAML describes our overall design for ListBox and other controls.

<Window x:Class="GetIconSample.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="337" Width="519">
    <Window.Resources>
        <ItemsPanelTemplate x:Key="ItemsPanelTemplate1">
            <WrapPanel IsItemsHost="True"/>
        </ItemsPanelTemplate>
        <Style x:Key="ListBoxItemStyle" TargetType="{x:Type ListBoxItem}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Padding" Value="2,0,0,0"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListBoxItem}">
                        <Border HorizontalAlignment="Center" VerticalAlignment="Center">
                            <StackPanel Orientation="Vertical">
                                <Image x:Name="img" Source="{Binding FileIcon}" Height="32" Width="32"/>
                                <TextBlock VerticalAlignment="Center" Width="75" TextWrapping="Wrap" Text="{Binding FileName}"/>
                            </StackPanel>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Button x:Name="btnBrowse" Click="btnBrowse_Click"
                Content="Browse" Height="23" HorizontalAlignment="Left" Margin="12,12,0,0" VerticalAlignment="Top" Width="119"/>
        <ListBox x:Name="lbFiles"
                 ItemContainerStyle="{DynamicResource ListBoxItemStyle}"
                 ItemsPanel="{DynamicResource ItemsPanelTemplate1}"
                 Margin="12,51,12,12" ScrollViewer.VerticalScrollBarVisibility="Visible" />
    </Grid>

</Window>

Now we would add code under Button Click of our Browse button.

public partial class Window1 : Window
    {
        ObservableCollection<MyFiles> myFilesList = new ObservableCollection<MyFiles>();

        public Window1()
        {
            InitializeComponent();
        }

        #region Button-Click-btnBrowse
        private void btnBrowse_Click(object sender, RoutedEventArgs e)
        {
            System.Windows.Forms.OpenFileDialog ofd = new System.Windows.Forms.OpenFileDialog();
            ofd.Filter = "All files (*.*)|*.*";
            if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                string filePath = ofd.FileName;
                FileToImageIconConverter some = new FileToImageIconConverter(filePath);
                ImageSource imgSource = some.Icon;

                myFilesList.Add(new MyFiles { FileName = ofd.SafeFileName, FileIcon = imgSource });
            }

            lbFiles.ItemsSource = myFilesList;
        }
        #endregion
    }

That's it. Run the application to see what we have achieved!

FileNameWPF4.gif

Hope this article helps.