# OnGetExpressionBNFAsync Method

## Overloads

| [OnGetExpressionBNFAsync(Response)](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.App.OnGetExpressionBNFAsync.htm#Qlik_Engine_App_OnGetExpressionBNFAsync_Qlik_Engine_Communication_IO_Response_) |  |  |
| --- | --- | --- |

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

## OnGetExpressionBNFAsync(Response)

### Declaration

```

          protected virtual GetExpressionBNFResult OnGetExpressionBNFAsync(Response response)
    
  
```

### Parameters

| Type | Name | Description |
| --- | --- | --- |
| [Response](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.IO.Response.htm) | response |  |

### Returns

| Type | Description |
| --- | --- |
| [GetExpressionBNFResult](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.GetExpressionBNFResult.htm) |  |