Hellow everyone, please someone help me... I want to read data from a pdf file but my coding does not work...

You're going to need a library of some sort to be able to parse a PDF file. Either that, or you'll have to look at the structure of a PDF and try to locate the content you're trying to read. I'd go with option 1. There are a good selection of commercial and free products.
Here is the ADOBE PDF format reference http://www.adobe.com/devnet/pdf/pdf_reference.html
And here is a sample project working with PDFs: http://www.codeproject.com/KB/recipes/mgpdfreader.aspx

Or post your code, and the errors or debug information showing where it goes wrong.

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