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Home > .NET Barcode > Barcode Generation Guide > .NET POSTNET Generator for .NET, ASP.NET, C#, VB.NET

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.NET POSTNET Generator for .NET, ASP.NET, C#, VB.NET

POSTNET Bar Code Generation Guide in .NET, C#, ASP.NET, VB.NET

  • Easily generate POSTNET barcodes in .NET applications
  • Generate high quality POSTNET images in JPEG, GIF & PNG formats
  • 100% build in C#, compatible with .net 2.0 and later version
  • Generate POSTNET barcodes using C#, VB.NET on ASP.NET or Windows Forms
  • Generate POSTNET in Crystal Reports using C#, VB.NET
  • Generate POSTNET in Reporting Service using C#, VB.NET
  • Mature .NET Barcode Generator component since 2003
  • Royalty-free and perpetual developer license


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Quick Navigate
  1. .NET POSTNET Barcode Introduction
  2. POSTNET Encoding Data Scope
  3. How to Generate POSTNET Barcode Image in IIS without Visual Studio .NET?
  4. How to Generate POSTNET Barcode Image through Web Controller in ASP.NET?
  5. How to Generate POSTNET Barcode Image through Windows Controller in .NET?
  6. How to Generate POSTNET Barcode Image in .NET class?
  7. How to Save POSTNET Barcode Image?
  8. POSTNET Barcode Property Settings

 

1. .NET POSTNET Barcode Introduction

POSTNET is also known as USPS POSTNET Barcode, USPS POSTal Numeric Encoding Technique Barcode, Delivery Point Barcode (DPBC), Postnet 3 of 5

The POSTNET (POSTal Numeric Encoding Technique) barcode was developed by the US Postal Service to encode ZIP Code information on letter mail for rapid and reliable sorting by BCSs. The POSTNET barcode can represent a five-digit ZIP Code (32 bars), a nine-digit ZIP+4 code (52 bars), or an eleven-digit delivery point code (62 bars).

The Delivery Point Barcode (DPBC) is formed by adding 10 bars to an existing ZIP+4 barcode. The 10 bars represent two additional digits (normally the last two digits of the street address, post office box, rural route number, or highway contract route number).


The Delivery Point Barcode (DPBC) - USPS POSTNET

The POSTNET barcode is always printed in a format that begins and ends with a frame bar (full or tall bar). To ensure POSTNET accuracy during mail processing, a correction character a.k.a. Checksum (five bars) must be included immediately before the rightmost frame bar of all POSTNET barcodes.

A 5 digit (plus check digit) barcode, containing the basic ZIP Code only, referred to as the "A" code.

A 6 digit (plus check digit) barcode, containing the last 2 digits of the ZIP Code and the 4 digits of the ZIP+4 Code, referred to as a "B" code.

A 9 digit (plus check digit) barcode, containing the ZIP Code and ZIP+4 Code, referred to as the "C" code.

An 11 digit (plus check digit) barcode, containing the ZIP Code, ZIP+4 Code, and the delivery point code. This is usually referred to as the DPBC, or Delivery Point Bar Code.


 

2. POSTNET Encoding Data Scope

Postnet Barcode for .NET, ASP.NET supports:
  • 0, 1, 2, 3, 4, 5, 6, 7, 8, 9


 

3. How to Generate POSTNET Barcode Image in IIS without Visual Studio .NET?

  • Under downloaded trial package, copy barcode folder to your IIS folder, e.g. C:\Inetpub.
  • Create a new virtual directory in IIS, named barcode, and link to the above "barcode" folder.
  • Restart IIS.
  • To test your installation, open your web browser and navigate to
    http://YourDomain:Port/barcode/linear.aspx?Type=POSTNET&Data=12345678901
  • To create barcode image in your aspx or html page, you need pass the url to IMG tag src value.

    For example:
    <img src="http://YourDomain:port/barcode/linear.aspx?Type=POSTNET&Data=12345678901" />

    Using this method, it will not generate any barcode images in your IIS server side.


 

4. How to Generate POSTNET Barcode Image through ASP.NET Web Form Control?

  1. Install .NET Barcode Controller to your ASP.NET project.
    1. Add Reference BarcodeLib.Barcode.dll to your project.
      Do not copy the dll to the bin directory, Visual Studio will do so, during project compilation time.
  2. Add barcode library to your Visual Studio Toolbox.
    1. Open Toolbox in Visual Studio. Click menu View, and check submenu Toolbox.
    2. Right click Toolbox, click menu Choose Items...
    3. Goto .NET Framework Components tab.
    4. If no BarcodeLib component found, click Browse... button and select BarcodeLib.Barcode.dll file.
    5. Then sort "Namespace" column, you will find 8 components from BarcodeLib.Barcode.
    6. Check component LinearWebForm, and its namespace is BarcodeLib.Barcode.Linear
    7. Click "OK" button, you will find four components under "General": LinearWebForm.
  3. Go to "barcode" folder in the trial package, copy file "linear.aspx" to the same folder as your aspx page, which will generate barcodes.
  4. You can drag LinearWebForm on your aspx page in design view, change barcode setting through properties window.
  5. Run the project, you will find barcode images generated in your aspx pages.


 

5. How to Generate POSTNET Barcode Image through .NET Windows Form Control in C# or VB.NET?

  1. Add Reference BarcodeLib.Barcode.dll to your project. Do not copy the dll to the bin directory, Visual Studio will do so, during project compilation time.
    1. In your .NET windows project, right click mouse over Refereces in your Solution Explorer window. Then click menu "Add Reference ...".
    2. Add BarcodeLib.Barcode.dll to your project.
  2. Add barcode library to your Visual Studio Toolbox.
    1. Open Toolbox in Visual Studio. Click menu View, and check submenu Toolbox.
    2. Right click Toolbox, click menu Choose Items...
    3. Goto .NET Framework Components tab.
    4. If no BarcodeLib component found, click Browse... button and select BarcodeLib.Barcode.dll file.
    5. Then sort "Namespace" column, you will find 8 components from BarcodeLib.Barcode.
    6. Check component LinearWinForm, and its namespace is BarcodeLib.Barcode.Linear
    7. Click "OK" button, you will find the control under "Common Controls": LinearWinForm.
  3. Now you can see the component displayed on Toolbox. You can drag LinearWinForm on your form, change barcode setting through properties widnow.


 

6. How to Generate POSTNET Barcode Image in .NET class?

  1. Add Reference BarcodeLib.Barcode.dll to your .NET project (ASP.NET website, Forms, any .NET project)
    In your .NET class. 
    	BarcodeLib.Barcode.Linear.Linear barcode = new BarcodeLib.Barcode.Linear.Linear();
	
	barcode.Type = BarcodeType.POSTNET;
	
	// should be 5, 6, 9, 11 digits
	barcode.Data = "12345678901";
	
	barcode.UOM = UnitOfMeasure.Pixel;
	barcode.BarWidth = 1;
	barcode.BarHeight = 80;
	barcode.LeftMargin = 10;
	barcode.TopMargin = 10;
	
	barcode.Format = ImageFormat.Png;
	
	// more barcode settings here
	                        
	// save barcode image into your system
	barcode.drawBarcode("c:/barcode.png");
	
	// generate barcode & output to byte array
	byte[] barcodeInBytes = barcode.drawBarcodeAsBytes();
	
	// generate barcode to Graphics object
	Graphics graphics = ...
	barcode.drawBarcode(graphics);
	
	// generate barcode and output to Bitmap object
	Bitmap barcodeInBitmap = barcode.drawBarcode();
	
	// generate barcode and output to HttpResponse object
	HttpResponse response = ...;
	barcode.drawBarcode(response);
	
	// generate barcode and output to Stream object
	Stream stream = ...;
	barcode.drawBarcode(stream);
Above code written in C# 2005


 

7. How to Save POSTNET Barcode Image using .NET Barcode Generator Windows Control?

In Windows Controller, just call method SaveAsImage(string filename). e.g. SaveAsImage("C:\barcode.gif");


 

8. POSTNET Barcode Property Settings

  • Set the Type property to BarcodeType.POSTNET
    Web Stream URL Parameter: Type. Value: 38. Sample: &Type=38
  • Set the Data property with the value to encode. Type is string.
    • Valid Data Scope:
      • 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
    • Valid Data Format: The valid data length should be 5, 6, 9, 11 digits. Please do not include last digit checksum.

      5 digit (plus check digit) - containing the basic ZIP Code only, referred to as the "A" code.

      6 digit (plus check digit) - containing the last 2 digits of the ZIP Code and the 4 digits of the ZIP+4 Code, referred to as a "B" code.

      9 digit (plus check digit) - containing the ZIP Code and ZIP+4 Code, referred to as the "C" code.

      11 digit (plus check digit) - containing the ZIP Code, ZIP+4 Code, and the delivery point code. This is usually referred to as the DPBC, or Delivery Point Bar Code.
    • Sample: "12345678901"
    Web Stream URL Parameter: Data.
  • AddCheckSum property is not applied here. Barcode Library will automatically add one checksum character using Modulo 10.
  • Barcode Size Settings:
    • Set property UOM (Unit of Measure) for properties BarWidth, BarHeight, LeftMargin and TopMargin.
      Valid values are UnitOfMeasure.Pixel (0), UnitOfMeasure.CM (1), UnitOfMeasure.Inch (2).
      Default is UnitOfMeasure.Pixel (0).
      Web Stream URL Parameter: UOM. Valid values are: 0, 1, 2.
    • Set the BarWidth (for bar cell width) and BarHeight (for bar cell height) properties.
      Both types are float.
      BarWidth default is 1 pixel.
      BarHeight default is 80 pixel.
      Web Stream URL Parameter: BarWidth and BarHeight.
    • Set LeftMargin for barcode image left & right margin
      Type is float. Default is 10 pixel.
      Web Stream URL Parameter: LeftMargin.
    • Set TopMargin for barcode image top & bottom margin
      Type is float. Default is 10 pixel.
      Web Stream URL Parameter: TopMargin.
    • Set the Resolution property (Value is expressed in DPI - Dots per inch).
      Type is int. Default is 96 dpi.
      Web Stream URL Parameter: Resolution.
  • Setting up text style in barcode image:
    • Set the ShowText properties. If ShowText is True, barcode data will be displayed with the barcode.
      Type is bool. Default is True.
      Web Stream URL Parameter: ShowText. Valid values are: "true", and "false".
    • Set the TextFont property. The font used to display text in barcode image.
      Type is System.Drawing.Font. Default is new Font("Arial", 9f, FontStyle.Regular).
      Web Stream URL Parameter: TextFont. Value format: [font name]|[font size]|[font style]. Sample Values: "Arial|12|Bold,Underline"
  • Set the Format property for barcode image type.
    Type is System.Drawing.Imaging.ImageFormat.
    Default value is ImageFormat.Png.
    Web Stream URL Parameter: Format. Valid values are: gif, jpeg, png, bmp, tiff.
  • Set Rotate property, if you want to rotate barcode image.
    Value can be
    0 (RotateOrientation.BottomFacingDown),
    1 (RotateOrientation.BottomFacingLeft),
    2 (RotateOrientation.BottomFacingUp),
    3 (RotateOrientation.BottomFacingRight)
    Default Value is 0 (RotateOrientation.BottomFacingDown)
    Web Stream URL Parameter: Rotate. Valid values are: 0, 1, 2, 3


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