Msdn c# read binary file

Hopefully, this article will allow the reader to improve the performance of binary file reading in their application and will shed some light on some of the undocumented performance traps hidden in the System. IO classes. It may seem silly to have a section on checking for the end of a file EOF , but there are a plethora of methods employed by programmers, and improperly checking for the EOF can absolutely cripple performance and introduce mysterious errors and exceptions to your application.

If you are using this method in any application, god save you. Based on its frequent appearance in. According to Microsoft, the BinaryReader. The BinaryReader class is used for reading binary files which are broken into bytes not chars, so why peek at the next char rather than byte?

I could understand if there was an issue implementing a common interface, but the TextReader derived classes just use Peek. Who cares? So, you get the next byte for free? As the result of some dark voodoo process, certain two byte combinations in your binary file can not be converted into an appropriate return value by the method.

I have no idea why certain byte combinations have been deigned toxic to PeekChar , but prepare for freaky results if you use it. This test is pretty straightforward. As it turns out, this statement is a massive performance bottleneck. After finishing the initial build of my application, it was time for some optimization.

Without the profiler results, I never would have imagined that this innocuous looking line of code was cutting the performance of my application into half. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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Any additional feedback? Note Make sure that your page is added to the project at the same level as the. In this article. Why not just use the byte array. Of course the comments might not describe what the code actually does. Generally, I find when comments and code disagree, both are wrong. Okay here is my second attempt. I'm using the binary reader. I am forcibly setting my byte array to , because I know that is the length of the first file.

I am glad that it works for you now. Thank you for sharing solution here. Please mark it as answer. Ask a question. Quick access. Search related threads. Remove From My Forums.

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