VB.NET Postnet Generator Size Setting Tutorial

sample source code to generate linear Postnet images and adjust barcode size in VB.NET


  • Easy to be installed in VB.NET IDEs
  • Reusable .NET component
  • Easy to define the width and height of a module bar in Postnet
  • Supported unit of measure include Pixel, Cm, and Inch
  • Print flexible margins around Postnet Symbol
  • Support symbol and background color setting
  • Generate Postnet in GIF, TIFF, BMP, PNG, and JPEG

Postnet, also known as USPS POSTNET Barcode, USPS POSTal Numeric Encoding Technique Barcode, is a delivery point barcodes adopted by United States Postal Services.

 

Postnet Symbology Structure



W: the width of Postnet, controlled by property BarCodeWidth

X (X ≥ 1 pixel): the width of a module bar, controlled by property X

Q (Q ≥ 10X): the width of the quiet zone, related to property LeftMargin & RightMargin


More information about Postnet barcode settings in Excel Barcode Generator,please see:

 

Postnet VB.NET Generator Size Setting Tutorial

After Postnet VB.NET Generator installation, get it ready in VB.NET by placing the following statement:

Dim postnet As OnBarcode.Barcode.Linear

postnet = New OnBarcode.Barcode.Linear

postnet.Type = OnBarcode.Barcode.BarcodeType.POSTNET

UOM

UOM is the controller of size setting unit. Pixel, Cm, and Inch are provided as its options. The default value of UOM is Pixel. For example, type the following statement to select Pixel as the unit of size setting measure:

postnet.UOM = OnBarcode.Barcode.UnitOfMeasure.PIXEL

X & Y

Property X (Type: Float; Default: 1) and Property Y (Type: Float; Default: 60) are used in Postnet barcode symbol size setting. X is for the module width setting, and Y controls the height of the bar.

Sample usage:

postnet.X = 2

postnet.Y = 70

BarCodeHeight & BarCodeWidth

Property BarCodeHeight (Type: Float; Default: 0) and Property BarCodeWidth (Type: Float; Default: 0) to set the size of the whole image.

Sample usage:

postnet.BarcodeHeight = 60

postnet.BarcodeWidth = 175

AutoResize

When the value of X, Y, BarCodeWidth, and BarCodeHeight conflict with each other, Property AutoResize (Type: bool; Default: False) should be enabled to solve the problem and make the Postnet 100% compatible with its symbology specification. See Postnet Barcode Size in VB.NET to know more usage of AutoResize.

Sample usage:

postnet.X = 2

postnet.BarcodeHeight = 60

postnet.AutoResize = True

TopMargin, BottomMargin, LeftMargin, & RightMargin

Using Postnet VB.NET Generator, a quiet zone with 10X width will be generated automatically at each side of the Postnet. When wider quiet zone is needed, you can increase the value of properties LeftMargin (Type: Float; Default: 0) and RightMargin (Type: Float; Default: 0). You can also create margins using TopMargin (Type: Float; Default: 0) and BottomMargin (Type: Float; Default: 0).

Sample usage:

postnet.TopMargin = 10

postnet.BottomMargin = 10

postnet.LeftMargin = 10

postnet.RightMargin = 10

TextMargin

Human readable text are required in almost every linear barcode symbology. Property TextMargin (Type: Float; Default: 6 pixel) is used to set the space between Postnet bar code and the human readable text below the barcode.

Sample usage:

postnet.TextMargin = 10







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