Create Bar Code and Display it in WPF

Today i am going to show you:
1. create a Bar Code using a Open Source Library
2. Display the bar code in a Window using WPF

Step 1:

Download the Source Code for Bar Code Generation library from:
https://github.com/barnhill/barcodelib

unzip the source code.
Open up visual studio 2015 and load the solution.
A Demo Project is included in source code, which doesn't worked for me. You need to add Missing Nuget Package (AjaxControlToolkit) for it to run properly.
To add this Nuget Package. In Visual Studio:

Search for "AjaxControlToolkit" and add it to BarCodeDemo Project(Web Project).
After doing this, the projects will compile.

Add WPF Demo Project in Solution and in WPFDemo Project, add Reference to BarCodeLib Project. As we need to use it in our WPFDemo project.

So far, We have build and Added BarCode Demo Project.
Now we are going to create our UI for Demo. Here is the WPF Xaml for our MainWindow.

<Grid>

        <Border BorderThickness="0" Height="70" Width="310" BorderBrush="YellowGreen">
            <Image Name="meraControl" />
        </Border>
        <Label x:Name="label" Content="Input for BarCode" HorizontalAlignment="Left" Margin="19,74,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="textBox" MaxLength="12" HorizontalAlignment="Left" Height="23" Margin="128,77,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="295"
                 PreviewTextInput="textBox_PreviewTextInput"/>
        <Button x:Name="button" Content="Do It" Margin="433,78,10.4,0" VerticalAlignment="Top" Click="button_Click"/>
    </Grid>

In the code behind of this file.

private void CreateBarCode()
        {  //Create BarCode Image
            BarcodeLib.Barcode b = new BarcodeLib.Barcode();
            b.IncludeLabel = true;
            System.Drawing.Image img = b.Encode(BarcodeLib.TYPE.UPCA, 
                                        textBox.Text, 
                                        System.Drawing.Color.Black, 
                                        System.Drawing.Color.White, 
                                        300, 
                                        65);
            //To show image on Window
            //Create image source from Memory
            MemoryStream ms = new MemoryStream();            
            img.Save(ms, ImageFormat.Bmp);//save image in memory
            //my buffer byte
            byte[] buffer = ms.GetBuffer();
            //Create new MemoryStream that has the contents of buffer
            MemoryStream bufferPasser = new MemoryStream(buffer);
            
            //I create a new BitmapImage to work with
            BitmapImage bitmap = new BitmapImage();
            bitmap.BeginInit();
            bitmap.StreamSource = bufferPasser;
            bitmap.EndInit();            
            meraControl.Source = bitmap;//I set the source of the image control type as the new //BitmapImage created earlier.            
        }        

        private static bool IsTextAllowed(string text)
        {
            Regex regex = new Regex("[^0-9]"); //regex that matches disallowed text
            return !regex.IsMatch(text);
        }

        private void textBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
        {
            if (IsTextAllowed(e.Text)){}
            else{e.Handled = true;}
        }



Last Step, Make WPFDemo Project as Startup Project and Start.

Following screen will appear:

Enter 12 Digit Number to generate BarCode for and Press "Do It" Button.

Hope it will be of some help :)
Comments are appreciated.