BinaryReader.Read dont support long values?

Steven Young 261

I need to use BinaryReader.Read to read the file that more than 2GB (greater than the integer value range), the function parameters only support int32.

_BinaryReader.Read(_Buffer, 0, ChunkSize) 'ChunkSize value is 5GB (5,368,709,120), it's long value.

David Lowndes 4,721 Reputation points

2021-06-26T23:05:36.413+00:00

Since it doesn't support it, do it in smaller chunks.
Viorel 119.2K Reputation points

2021-06-27T07:09:17.543+00:00

Did you manage to create the target buffer having such large size? The length of arrays is limited.

Accepted answer

Sam of Simple Samples 5,546 Reputation points

2021-06-27T17:34:36.37+00:00

Can you use a Memory Mapped File? MemoryMappedFile Class says:

Memory-mapped files enable programmers to work with extremely large files

So that appears to be what Microsoft intends to be used for such large files.
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Steven Young 261 Reputation points

2021-06-28T03:29:52.4+00:00

Sure， thank you.
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