File.ReadBytes

method · File · cAlgo.API Since 5.7

DesktopCLICloud

Reads a sequence of bytes from the file.

Environment behaviour

Cloud — not supported. Exists returns false; reads return empty string/array; writes and appends silently do nothing. No exception.

Definition

C#Python

byte[] ReadBytes(int offset, int count)

file.ReadBytes(offset: int, count: int) -> list[int]

Parameters

Name	C# type	Python type	Description
`offset`	`int`	`int`	File byte offset
`count`	`int`	`int`	Count of bytes to read

Returns byte[] — byte[]

Examples

C#Pythonconfig.json

protected override void OnStart()
{
    var header = DataFile.ReadBytes(0, 16);
    Print("File header: {0}", Encoding.UTF8.GetString(header));
}

from System.Text import Encoding

header = api.DataFile.ReadBytes(0, 16)
api.Print(f"File header: {Encoding.UTF8.GetString(header)}")

{
  "Parameters": [
    {
      "Name": "DataFile",
      "DisplayName": "Data File",
      "Type": "File"
    }
  ]
}