C# read file bytes into array

SaveFile path, bytes ;. SaveFile path , bytes ;. Save File - Memory Stream. MemoryStream fileMS; Utils. SaveFile path, fileMS.

ToArray ;. MemoryStream fileMS ;. SaveFile path , fileMS. Utils Namespace. FileStream filePath, System. Open, System. Length]; fs.

Read fileBytes, 0, fileBytes. Create, System. Next File. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Most popular in C. More related articles in C. Differences Between. The above is still a good way to read a file using a FileStream object, but a few years on and this functionality is now baked into the.

NET framework. Cambia Research. Subscribe via email Click Here to Subscribe. Developer Tips and Tutorials. Also, putting it in a using statement ensures the FileStream and BinaryReader are closed and disposed.

In case with 'a large file' is meant beyond the 4GB limit, then my following written code logic is appropriate. Use the BufferedStream class in C to improve performance. A buffer is a block of bytes in memory used to cache data, thereby reducing the number of calls to the operating system.

Buffers improve read and write performance. I would recommend trying the Response. TransferFile method then a Response. Flush and Response. End for serving your large files. It's much easier just to hand the stream off to MD5 and allow that to chunk your file for you:. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Best way to read a large file into a byte array in C? Ask Question. Asked 12 years ago. Active 1 year, 7 months ago. Viewed k times. Open, FileAccess. Peter Mortensen ReadAllBytes fileName. Why does it being a third party webservice imply the file needs to be fully in RAM before being sent to the webservice, rather than streamed? The webservice won't know the difference. Brian, Some clients don't know how to handle a.

NET stream, like Java for instance. When this is the case all that can be done is to read the entire file in byte array. NET stream. The clients won't know the difference either way. Add a comment. Active Oldest Votes. Simply replace the whole thing with: return File. ReadAllBytes fileName ; However, if you are concerned about the memory consumption, you should not read the whole file into memory all at once at all.

Generally, you should stream the file and not store it in memory altogether. You might want to look at this for a stopgap measure: msdn. There is a limit for array size in.