Barcode Professional SDK for .NET更新至v8.0，新增QR碼條形碼、TLC39條碼、Code 49條碼等多種新條碼，歡迎下載體驗。

Barcode ProfessioKnal SDK for .NET v7.0更新

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本次教程將向您展示如何使用Barcode Professional SDK for .NET在PDF文檔中插入EAN/UPC復合型條形碼，2D PDF417條形碼和GS1線性條形碼。

In this article, we’ll show you how to use Barcode Professional SDK for .NET along iTextSharp for inserting or stamping an EAN/UPC Composite barcode, a 2D Micro PDF417 barcode, and a linear GS1 DataBar (formerly RSS) barcode which are not part of iTextSharp library into an existing PDF document.

Most current 2D barcodes like Data Matrix, QR Code, Aztec Code, PDF417, etc; were not designed to encode Unicode two-byte characters but single-byte strings only. In general, the default character set for 2D barcodes is ISO-8859-1 Latin 1 although it is possible to use other single-byte character sets by using ECI (Extended Channel Interpretation) feature.