---
sidebar_position: 6
---

import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';

# Attach file to the topic
 Attaches a file to the selected task



`Function AttachFileToTopic(Val URL, Val TaskID, Val FileID, Val Token = "") Export`

  | Parameter | CLI option | Type | Required | Description |
  |-|-|-|-|-|
  | URL | --url | String | ✔ | URL of webhook or a Bitrix24 domain, when token used |
  | TaskID | --task | Number, String | ✔ | Task ID |
  | FileID | --fileid | Number, String | ✔ | File ID |
  | Token | --token | String | ✖ | Access token, when app auth method used |

  
  Returns:  Map Of KeyAndValue - serialized JSON of answer from Bitrix24 API

<br/>

:::tip
Method at API documentation: [tasks.task.files.attach](https://dev.1c-bitrix.ru/rest_help/tasks/task/tasks/tasks_task_files_attach.php)
:::
<br/>


```bsl title="1C:Enterprise/OneScript code example"
    URL    = "https://b24-ar17wx.bitrix24.by/rest/1/1o2...";
    TaskID = "2566";
    FileID = "13578";

    Result = OPI_Bitrix24.AttachFileToTopic(URL, TaskID, FileID);

    URL    = "b24-ar17wx.bitrix24.by";
    Token  = "67ac1467006e9f06006b12e400000001000...";
    TaskID = "2568";

    Result = OPI_Bitrix24.AttachFileToTopic(URL, TaskID, FileID, Token);
```
 



```json title="Result"
{
 "result": {
  "attachmentId": 3606
 },
 "time": {
  "start": 1728454790.16012,
  "finish": 1728454790.22105,
  "duration": 0.0609369277954102,
  "processing": 0.0364110469818115,
  "date_start": "2024-10-09T09:19:50+03:00",
  "date_finish": "2024-10-09T09:19:50+03:00",
  "operating_reset_at": 1728455390,
  "operating": 0
 }
}
```