GetLength
如果 CDocBuilderValue 对象是数组/类型化数组，则返回其长度。否则，返回 0。
请注意，在
.docbuilder文件中不使用CDocBuilderValue.GetLength方法。
语法
HRESULT GetLength([out, retval] long* result);
参数
| 参数 | 类型 | 描述 |
|---|---|---|
| result | long* | 返回的对象长度。 |
示例
COM
CoInitialize(NULL);
IONLYOFFICEDocBuilder* oBuilder = NULL;
IONLYOFFICEDocBuilderContext* oContext = NULL;
IONLYOFFICEDocBuilderValue* oGlobal = NULL;
IONLYOFFICEDocBuilderValue* oApi = NULL;
IONLYOFFICEDocBuilderValue* oDocument = NULL;
IONLYOFFICEDocBuilderValue* aCharts = NULL;
IONLYOFFICEDocBuilderValue* nLength = NULL;
oBuilder->Initialize();
oBuilder->GetContext(&oContext);
oContext->GetGlobal(&oGlobal);
oGlobal->GetProperty(_bstr_t("Api"), &oApi);
oApi->Call(_bstr_t("GetDocument"), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), &oDocument);
oDocument->Call(_bstr_t("GetAllCharts"), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), ATL::CComVariant(), &aCharts);
aCharts->GetLength(&nLength);
oBuilder->Dispose();