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Using Free C# source code to generate Code 128 image labels for ASP.NET Web & Windows Applications
In this C# tutorial, you will learn how to generate Code 128 barcode with your target image width and height in .NET ASP.NET, Windows applications.
How to create Code 128 barcodes using C#
OnBarcode offers explanation of how to set Code 128 image size in C#.NET. And users are entitled to adjust Code 128 barcode size using the products below. Code 128 Structure
Setting Code 128 Barcode Size in C#Basic information you should know
Code 128 barcode width, W (measured in pixel), including quiet zones, can be computed from the expression below:
Code 128 barcode height is user-defined. So you can adjust the barcode height through Top and Bottom Margin settings in C# Code 128 generator according to your applications.
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Three Situations for Setting Code 128 Barcode Size in C#
Setting Code 128 barcode size in C# Code 128 Generator may have three situations:
Situation 1:
If you want to create a Code 128 with a minimum X, please do as below: Eg1. Set in C# Code 128 generator:
code128.X = 4;
code128.AutoResize = false;
Other properties: default;
The generated Code 128 image is:
Situation 2:
If you want to generate a Code 128 with a fixed barcode image width (W), and try to draw maximum barcode module (X) as possible, please do as follows: Eg2. Set in C# Code 128 generator:
code128.BarcodeWidth = 300;
code128.BarcodeHeight = 60;
code128.AutoResize = true;
Other properties: default;
The generated Code 128 image is:
 In the above Code 128 image, the bar module (X) is 3 pixel, which is the maximum bar module.
Situation 3:
If you want to generate a Code 128 with minimum X and fixed barcode image width (W), please do as below: Eg3. Set in C# Code 128 generator:
code128.X = 2;
code128.BarcodeWidth = 200;
code128.AutoResize = false;
Other properties: default;
The generated Code 128 image is:
Note that, once you have set bar module (X) value, there will be a minimum barcode image width defined by Code 128 ISO specification.
Code128 minimum barcode image width (W min) is:
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:  If your BarcodeWidth setting is 250 pixel, which is larger than the minimum barcode width (198 pixel), the generated code 128 image will be like below. And extra 51 pixel space has been added to the left and right side of barcode image.  |
