# GetFileTableFieldsAsync Method

## Overloads

| [GetFileTableFieldsAsync(String, String, FileDataFormat, String)](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm#Qlik_Engine_IApp_GetFileTableFieldsAsync_System_String_System_String_Qlik_Engine_FileDataFormat_System_String_) |  | Lists the fields of a table for a folder connection.<br><br>FileType<br><br>Recognized file formats are:<br><br>\* `CSV` for Delimited<br><br>\* `FIX` for Fixed Record<br><br>\* `DIF` for Data Interchange Format<br><br>\* `EXCEL_BIFF` for Microsoft Excel (XLS)<br><br>\* `EXCEL_OOXML` for Microsoft Excel (XLSX)<br><br>\* `HTML` for HTML<br><br>\* `QVD` for QVD file<br><br>\* `XML` for XML<br><br>\* `QVX` for QVX file<br><br>\* `JSON` for JSON format<br><br>\* `KML` for KML file<br><br>\* `PARQUET` for PARQUET file |
| --- | --- | --- |
| [GetFileTableFieldsAsync(AsyncHandle, String, String, FileDataFormat, String)](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm#Qlik_Engine_IApp_GetFileTableFieldsAsync_Qlik_Engine_AsyncHandle_System_String_System_String_Qlik_Engine_FileDataFormat_System_String_) |  | Lists the fields of a table for a folder connection.<br><br>FileType<br><br>Recognized file formats are:<br><br>\* `CSV` for Delimited<br><br>\* `FIX` for Fixed Record<br><br>\* `DIF` for Data Interchange Format<br><br>\* `EXCEL_BIFF` for Microsoft Excel (XLS)<br><br>\* `EXCEL_OOXML` for Microsoft Excel (XLSX)<br><br>\* `HTML` for HTML<br><br>\* `QVD` for QVD file<br><br>\* `XML` for XML<br><br>\* `QVX` for QVX file<br><br>\* `JSON` for JSON format<br><br>\* `KML` for KML file<br><br>\* `PARQUET` for PARQUET file |
| [GetFileTableFieldsAsync<T>(AsyncHandle, Func<Response, T>, String, String, FileDataFormat, String)](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm#Qlik_Engine_IApp_GetFileTableFieldsAsync__1_Qlik_Engine_AsyncHandle_System_Func_Qlik_Engine_Communication_IO_Response___0__System_String_System_String_Qlik_Engine_FileDataFormat_System_String_) |  | Lists the fields of a table for a folder connection.<br><br>FileType<br><br>Recognized file formats are:<br><br>\* `CSV` for Delimited<br><br>\* `FIX` for Fixed Record<br><br>\* `DIF` for Data Interchange Format<br><br>\* `EXCEL_BIFF` for Microsoft Excel (XLS)<br><br>\* `EXCEL_OOXML` for Microsoft Excel (XLSX)<br><br>\* `HTML` for HTML<br><br>\* `QVD` for QVD file<br><br>\* `XML` for XML<br><br>\* `QVX` for QVX file<br><br>\* `JSON` for JSON format<br><br>\* `KML` for KML file<br><br>\* `PARQUET` for PARQUET file |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm)

## GetFileTableFieldsAsync(String, String, FileDataFormat, String)

Lists the fields of a table for a folder connection.

#### FileType

Recognized file formats are:

* CSV for Delimited
* FIX for Fixed Record
* DIF for Data Interchange Format
* EXCEL\_BIFF for Microsoft Excel (XLS)
* EXCEL\_OOXML for Microsoft Excel (XLSX)
* HTML for HTML
* QVD for QVD file
* XML for XML
* QVX for QVX file
* JSON for JSON format
* KML for KML file
* PARQUET for PARQUET file

### Declaration

```

          Task<GetFileTableFieldsResult> GetFileTableFieldsAsync([QixName("qConnectionId")] string connectionId, [QixName("qRelativePath")] string relativePath = null, [QixName("qDataFormat")] FileDataFormat dataFormat, [QixName("qTable")] string table)
    
  
```

### Parameters

| Type | Name | Description |
| --- | --- | --- |
| System.String | connectionId | Identifier of the connection. |
| System.String | relativePath | Path of the connection file. |
| [FileDataFormat](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.FileDataFormat.htm) | dataFormat | Type of the file. |
| System.String | table | Name of the table.<br>This parameter must be set for `XLS` , `XLSX` , ` HTML   ` and `XML` files. |

### Returns

| Type | Description |
| --- | --- |
| System.Threading.Tasks.Task&lt;[GetFileTableFieldsResult](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.GetFileTableFieldsResult.htm)&gt; |  |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm)

## GetFileTableFieldsAsync(AsyncHandle, String, String, FileDataFormat, String)

Lists the fields of a table for a folder connection.

#### FileType

Recognized file formats are:

* CSV for Delimited
* FIX for Fixed Record
* DIF for Data Interchange Format
* EXCEL\_BIFF for Microsoft Excel (XLS)
* EXCEL\_OOXML for Microsoft Excel (XLSX)
* HTML for HTML
* QVD for QVD file
* XML for XML
* QVX for QVX file
* JSON for JSON format
* KML for KML file
* PARQUET for PARQUET file

### Declaration

```

          Task<GetFileTableFieldsResult> GetFileTableFieldsAsync(AsyncHandle asyncHandle, [QixName("qConnectionId")] string connectionId, [QixName("qRelativePath")] string relativePath = null, [QixName("qDataFormat")] FileDataFormat dataFormat, [QixName("qTable")] string table)
    
  
```

### Parameters

| Type | Name | Description |
| --- | --- | --- |
| [AsyncHandle](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AsyncHandle.htm) | asyncHandle | Handle to asynchronous method request |
| System.String | connectionId | Identifier of the connection. |
| System.String | relativePath | Path of the connection file. |
| [FileDataFormat](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.FileDataFormat.htm) | dataFormat | Type of the file. |
| System.String | table | Name of the table.<br>This parameter must be set for `XLS` , `XLSX` , ` HTML   ` and `XML` files. |

### Returns

| Type | Description |
| --- | --- |
| System.Threading.Tasks.Task&lt;[GetFileTableFieldsResult](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.GetFileTableFieldsResult.htm)&gt; |  |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetFileTableFieldsAsync.htm)

## GetFileTableFieldsAsync&lt;T&gt;(AsyncHandle, Func&lt;Response, T&gt;, String, String, FileDataFormat, String)

Lists the fields of a table for a folder connection.

#### FileType

Recognized file formats are:

* CSV for Delimited
* FIX for Fixed Record
* DIF for Data Interchange Format
* EXCEL\_BIFF for Microsoft Excel (XLS)
* EXCEL\_OOXML for Microsoft Excel (XLSX)
* HTML for HTML
* QVD for QVD file
* XML for XML
* QVX for QVX file
* JSON for JSON format
* KML for KML file
* PARQUET for PARQUET file

### Declaration

```
Task<T> GetFileTableFieldsAsync<T>(AsyncHandle asyncHandle, Func<Response, T> onResult, [QixName("qConnectionId")] string connectionId, [QixName("qRelativePath")] string relativePath = null, [QixName("qDataFormat")] FileDataFormat dataFormat, [QixName("qTable")] string table)
```

### Parameters

| Type | Name | Description |
| --- | --- | --- |
| [AsyncHandle](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AsyncHandle.htm) | asyncHandle | Handle to asynchronous method request |
| System.Func&lt;[Response](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.IO.Response.htm), T&gt; | onResult | Continuation function |
| System.String | connectionId | Identifier of the connection. |
| System.String | relativePath | Path of the connection file. |
| [FileDataFormat](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.FileDataFormat.htm) | dataFormat | Type of the file. |
| System.String | table | Name of the table.<br>This parameter must be set for `XLS` , `XLSX` , ` HTML   ` and `XML` files. |

### Returns

| Type | Description |
| --- | --- |
| System.Threading.Tasks.Task&lt;T&gt; |  |

### Type Parameters

| Name | Description |
| --- | --- |
| T |  |