Setting Code 39 Barcode Size in C#

C# Code 39 Size Setting

To help users have a better understanding about setting Code 39 image size, OnBarcode provides details of Code 39 size setting in C#. And users can easily adjust Code 39 barcode size with the following OnBarcode products:


Code 39 Structure

  • W : the width of Code 39.
  • Q : the width of the quiet zone; Q min = 10X.
  • I : the width of the intercharacter gap; this is a multiple of X; I min = X.
  • C : the number of encoded Code 39 data characters (including module 43 check character if used).
  • X : the width of Code 39 narrow bar; X min = 1 pixel.
  • N : the wide bar to narrow bar ratio; from 2.0 to 3.0, inclusive.



Setting Code 39 Barcode Size in C#

Basic information you should know

Code 39 barcode width, W (measured in pixel), including quiet zones, can be computed from the expression below:

W = ( C + 2 ) ( 3N + 6 ) X + ( C + 1 ) I + 2Q

Code 39 barcode height is user-defined. So you can adjust the barcode height through Top and Bottom Margin settings in C# Code 39 generator according to your applications.


Three Situations for Setting Code 39 Barcode Size in C#

Setting Code 39 barcode size in C# Code 39 Generator may have three situations:

Situation 1:

If you want to create a Code 39 with a minimum X, please do as below:
  • Set the minimum value of X.
  • Set the AutoResize option to be false.
  • Customize other properties.
Eg1. Set in C# Code 39 generator:
code39.X = 3;
code39.AutoResize = false;
code39.I = code39.X;
Other properties: default;
The generated Code 39 image is:


Situation 2:

If you want to generate a Code 39 with a fixed barcode image width (W), and try to draw maximum barcode module (X) as possible, please do as follows:
  • Set the fixed value of barcode image width (W).
  • Set the AutoResize option to be true.
  • Customize other properties.
Eg2. Set in C# Code 39 generator:
code39.BarcodeWidth = 250;
code39.BarcodeHeight = 60;
code39.AutoResize = true;
code39.I = code39.X;
Other properties: default;
The generated Code 39 image is:

In the above Code 39 image, the bar module (X) is 2 pixel, which is the maximum bar module.


Situation 3:

If you want to generate a Code 39 with minimum X and fixed barcode image width (W), please do as below:
  • Set the values of minimum X and barcode image width (W).
  • Set the AutoResize option to be false.
  • Customize other properties.
Eg3. Set in C# Code 39 generator:
code39.X = 2;
code39.BarcodeWidth = 280;
code39.AutoResize = false;
code39.I = code39.X;
Other properties: default;
The generated Code 39 image is:


Note that, once you have set bar module (X) value, there will be a minimum barcode image width defined by Code 39 ISO specification.

Code39 minimum barcode image width (W min) is:

= ( C + 2 ) ( 3 * 2 + 6 ) X + ( C + 1 ) X + 2 * 10 X

So if your BarcodeWidth value is less than the minimum barcode width, the barcode generator component will reset BarcodeWidth value to the minimum barcode width value.

For example, you set:

code39.X = 3;
code39.BarcodeWidth = 280;
code39.I = 1;
code39. Data = "12345";
code39.AutoResize = false;
Other properties: default;
Then Code 39 barcode minimum width (W min) is:
= ( 5 + 2 ) ( 3 * 2 + 6 ) X + ( 5 + 1 ) X + 2 * 10X       //C = 5
= 7 * 12 X + 26 X
= 110 X       //X = 3
= 330 pixel

Now your BarcodeWidth setting is 280 pixel, which is less than the minimum barcode width, the component generated code 39 image will be like this.


If your BarcodeWidth setting is 380 pixel, which is larger than the minimum barcode width (280 pixel), the generated code 39 image will be like below. And extra 50 pixel space has been added to the left and right side of barcode image.






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