CreateNull
创建 null 值，相当于 JS 中的 null。
备注
对于 .docbuilder 文件，不使用 CDocBuilderContext.CreateNull 方法。
语法
- Python
- C++
- COM
- Java
- .Net
def CreateNull(self) -> CDocBuilderValue
CDocBuilderValue CreateNull();
HRESULT CreateNull([out, retval] I_DOCBUILDER_VALUE** result);
CDocBuilderValue createNull();
CDocBuilderValue^ CreateNull();
参数
仅限 COM
- COM
| 名称 | 类型 | 描述 |
|---|---|---|
| result | I_DOCBUILDER_VALUE** | 用于存储创建的 null 值的指针 |
示例
- Python
- C++
- COM
- Java
- .Net
builder = docbuilder.CDocBuilder()
context = builder.GetContext()
content = context.CreateNull()
std::wstring sWorkDirectory = NSUtils::GetBuilderDirectory();
CDocBuilder::Initialize(sWorkDirectory.c_str());
CDocBuilder oBuilder;
CContext oContext = oBuilder.GetContext();
CValue oNull = oContext.CreateNull();
CDocBuilder::Dispose();
CoInitialize(NULL);
IONLYOFFICEDocBuilder* oBuilder = NULL;
IONLYOFFICEDocBuilderContext* oContext = NULL;
IONLYOFFICEDocBuilderValue* oContent = NULL;
oBuilder->Initialize();
oBuilder->GetContext(&oContext);
oContext->CreateNull(&oContent);
oBuilder->Dispose();
CDocBuilder.initialize("");
CDocBuilder builder = new CDocBuilder();
CDocBuilderContext context = builder.getContext();
CDocBuilderValue nullValue = context.createNull();
CDocBuilder.dispose();
string workDirectory = "C:/Program Files/ONLYOFFICE/documentBuilder";
CDocBuilder.Initialize(workDirectory);
CDocBuilder oBuilder = new CDocBuilder();
CContext oContext = oBuilder.GetContext();
CValue oNull = oContext.CreateNull();
CDocBuilder.Destroy();