CreateNull

创建 null 值，相当于 JS 中的 null。

备注

此方法不适用于 JS。

语法

Python

def CreateNull(self) -> CDocBuilderValue

C++

CDocBuilderValue CreateNull();

COM

HRESULT CreateNull([out, retval] I_DOCBUILDER_VALUE** result);

Java

CDocBuilderValue createNull();

.Net

CDocBuilderValue^ CreateNull();

参数

Python

此方法没有参数。

C++

此方法没有参数。

COM

名称	类型	描述
result	I_DOCBUILDER_VALUE**	用于存储创建的 null 值的指针

Java

此方法没有参数。

.Net

此方法没有参数。

示例

Python

builder = docbuilder.CDocBuilder()
context = builder.GetContext()
content = context.CreateNull()

C++

std::wstring sWorkDirectory = NSUtils::GetBuilderDirectory();
CDocBuilder::Initialize(sWorkDirectory.c_str());
CDocBuilder oBuilder;
CContext oContext = oBuilder.GetContext();
CValue oNull = oContext.CreateNull();
CDocBuilder::Dispose();

COM

CoInitialize(NULL);
IONLYOFFICEDocBuilder* oBuilder = NULL;
CoCreateInstance(__uuidof(CONLYOFFICEDocBuilder), NULL, CLSCTX_INPROC_SERVER, __uuidof(IONLYOFFICEDocBuilder), (void**)&oBuilder);
IONLYOFFICEDocBuilderContext* oContext = NULL;
IONLYOFFICEDocBuilderValue* oContent = NULL;
oBuilder->Initialize();
oBuilder->GetContext(&oContext);
oContext->CreateNull(&oContent);
oBuilder->Dispose();

Java

CDocBuilder.initialize("");
CDocBuilder builder = new CDocBuilder();
CDocBuilderContext context = builder.getContext();
CDocBuilderValue nullValue = context.createNull();
CDocBuilder.dispose();

.Net

string workDirectory = "C:/Program Files/ONLYOFFICE/documentBuilder";
CDocBuilder.Initialize(workDirectory);
CDocBuilder oBuilder = new CDocBuilder();
CContext oContext = oBuilder.GetContext();
CValue oNull = oContext.CreateNull();
CDocBuilder.Destroy();