Attach Files to a Task tasks.task.files.attach

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"taskId":8017,"fileId":1065,"auth":"**put_access_token_here**"}' \
        https://**put_your_bitrix24_address**/rest/tasks.task.files.attach
        

// This snippet is an ES module: top-level await requires type="module" or a bundler.
        // $b24 is an already-initialized SDK instance (see the SDK "Get started" guide).
        import { Text } from '@bitrix24/b24jssdk'
        import type { B24Frame } from '@bitrix24/b24jssdk'
        
        declare const $b24: B24Frame
        
        // Shape of the payload returned in result (match the "response handling" section of the page)
        type AttachFileResult = {
          attachmentId: number
        }
        
        try {
          const response = await $b24.actions.v2.call.make<AttachFileResult>({
            method: 'tasks.task.files.attach',
            params: {
              taskId: 8017,
              fileId: 1065,
            },
            requestId: Text.getUuidRfc4122()
          })
        
          // The payload is available only on a successful response
          if (!response.isSuccess) {
            console.error(response.getErrorMessages().join('; '))
          } else {
            const result = response.getData()!.result
            console.info('Attachment ID:', result.attachmentId)
          }
        } catch (error) {
          // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
          console.error(error)
        }
        

<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
        <script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
        <script>
          async function attachFile() {
            try {
              // Initialize the SDK inside a Bitrix24 frame
              const $b24 = await B24Js.initializeB24Frame()
        
              const response = await $b24.actions.v2.call.make({
                method: 'tasks.task.files.attach',
                params: {
                  taskId: 8017,
                  fileId: 1065,
                },
                requestId: B24Js.Text.getUuidRfc4122()
              })
        
              // The payload is available only on a successful response
              if (!response.isSuccess) {
                console.error(response.getErrorMessages().join('; '))
                return
              }
        
              const result = response.getData().result
              console.info('Attachment ID:', result.attachmentId)
            } catch (error) {
              // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
              console.error(error)
            }
          }
        
          document.addEventListener('DOMContentLoaded', attachFile)
        </script>
        

try {
            $response = $b24Service
                ->core
                ->call(
                    'tasks.task.files.attach',
                    [
                        'taskId' => 8017,
                        'fileId' => 1065
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            echo 'Success: ' . print_r($result, true);
            processData($result);
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error attaching file: ' . $e->getMessage();
        }
        

BX24.callMethod(
            'tasks.task.files.attach',
            {
                taskId: 8017,
                fileId: 1065
            },
            function(result){
                console.info(result.data());
                console.log(result);
            }
        );
        

require_once('crest.php');
        
        $result = CRest::call(
            'tasks.task.files.attach',
            [
                'taskId' => 8017,
                'fileId' => 1065
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';