File.WriteBytes

method · File · cAlgo.API Since 5.7

DesktopCLICloud

Writes a chunk of data to file specific position.

Environment behaviour

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

Definition

C#Python

void WriteBytes(byte[] bytes, int offset, int count)

file.WriteBytes(bytes: list[int], offset: int, count: int) -> None

Parameters

Name	C# type	Python type	Description
`bytes`	`byte[]`	`list[int]`	Bytes to write
`offset`	`int`	`int`	File byte offset
`count`	`int`	`int`	Count of bytes to write

Examples

C#Pythonconfig.json

protected override void OnStart()
{
    var bytes = Encoding.UTF8.GetBytes(SymbolName);
    DataFile.WriteBytes(bytes, 0, bytes.Length);
}

from System.Text import Encoding

data = Encoding.UTF8.GetBytes(api.SymbolName)
api.DataFile.WriteBytes(data, 0, data.Length)

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