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# XblHttpCallGetNumHeaders

> XblHttpCallGetNumHeaders

# XblHttpCallGetNumHeaders

获取 HTTP 调用中响应标头的数量。

## 语法

```cpp theme={null}
HRESULT XblHttpCallGetNumHeaders(  
         XblHttpCallHandle call,  
         uint32_t* numHeaders  
)  
```

### 参数

*call*   \_In\_\
类型：[XblHttpCallHandle](/reference/live/xsapi-c/http_call_c/handles/xblhttpcallhandle)

HTTP 调用的句柄。

*numHeaders*   \_Out\_\
类型：uint32\_t\*

HTTP 调用中响应标头的数量。

### 返回值

类型：HRESULT

此 API 操作的结果代码。可能的值为 S\_OK、E\_INVALIDARG 或 E\_FAIL。

## 备注

只能在 HTTP 任务完成后调用 [XblHttpCallPerformAsync](/reference/live/xsapi-c/http_call_c/functions/xblhttpcallperformasync) 之后调用此函数。

## 要求

**头文件：** http\_call\_c.h

**库：** Microsoft.Xbox.Services.14x.GDK.C.lib

## 另请参阅

[http\_call\_c](/reference/live/xsapi-c/http_call_c/http_call_c_members)


## Related topics

- [XblHttpCallGetHeaderAtIndex](/zh-CN/reference/live/xsapi-c/http_call_c/functions/xblhttpcallgetheaderatindex.md)
- [HCHttpCallResponseGetNumHeaders](/zh-CN/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetnumheaders.md)
- [HCHttpCallRequestGetNumHeaders](/zh-CN/reference/live/httpclient/httpprovider/functions/hchttpcallrequestgetnumheaders.md)
- [HCHttpCallRequestGetHeaderAtIndex](/zh-CN/reference/live/httpclient/httpprovider/functions/hchttpcallrequestgetheaderatindex.md)
- [HCHttpCallResponseGetHeaderAtIndex](/zh-CN/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetheaderatindex.md)