如何使用.Net通过扫描仪从打印的PDF读取条形码 [英] How to read barcode by scanner from printed PDF using .Net

问题描述

Hello Experts，



新年快乐！



我创建了一个Web应用程序，其中



1）用户输入一些常规数据（名称，他要求退货的物品等）。



2）提交的表格创建一个独特的字符串并创建条形码图像



3）条形码图像打印在PDF表格上



4）现在，如果我扫描打印PDF上的条形码，它应该显示仓库中存在此声明的位置。



在上面的步骤中，我已经成功到第3步。



我从来没有和任何人合作过条形码扫描仪较早，所以我想得到一些想法/建议/教程，可以帮助实际真正的大步4.



请不要告诉我谷歌。我去过那里，对.Net没什么帮助。大多数链接都在JAVA中，我不是在寻找。



我想知道如何开始将扫描仪连接到我的Web应用程序？

我也想知道如何编写一个实际扫描打印PDF条形码的程序，并显示数据库中的结果。



非常感谢任何形式的帮助！



谢谢

Hello Experts,

Happy New year!

I have created a web application where

1) the user enters some regular data(name, the Item he is claiming for return etc.).

2) The submitted form creates a unique string and creates a Barcode image

3) That barcode Image is printed on the PDF form

4) Now if I scan the barcode that is on printed PDF, it should display the place where this claim exists in warehouse.

In the above steps, I have succeeded until Step 3.

I have never worked with any Barcode scanner earlier so I would like get some ideas /suggestion/ tutorials that can help for actual real big step 4.

Please do not tell me to google. I have been there and nothing helps much with .Net. Most of the links are in JAVA which I am not looking for.

I want to know how to start tying the scanner to my web application?
I also want to know how to write a program that actually scans the barcode from printed PDF and display the results from the Database.

Any sort of help is much appreciated!

Thanks

推荐答案

如果扫描仪在客户端机器，VB.NET / C＃/ ASP.NET代码是不可能的。 ASP.NET代码完全在服务器端运行，无法访问客户端计算机，更不用说连接到它们的硬件了。您唯一的解决方案是Javascript解决方案。

If the "scanner" is on a client machine, VB.NET/C#/ASP.NET code is out of the question. ASP.NET code runs entirely server-side and does not have access to the client machines, let alone the hardware attached to them. Your only solution is a Javascript solution.

如果您使用带USB连接的条形码扫描仪，它将具有键盘仿真功能。这意味着它会在PC上显示为扫描条形码时发送击键的键盘。您只需要一个输入控件，并确保它在扫描前具有输入焦点。而已。根本不需要特殊软件。

If you're using a barcode scanner with USB connection, it will have keyboard emulation. Meaning it will appear to the PC as a keyboard that's sending keystrokes when you scan a barcode. You just need an input control and make sure it has input focus before scanning. That's it. No special software required at all.

这篇关于如何使用.Net通过扫描仪从打印的PDF读取条形码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！