CreateNull

创建空值。此方法返回当前上下文并调用其 CreateNull 方法。

备注

此方法在 COM 中不可用。

请注意，对于 .docbuilder 文件，不使用 CDocBuilderValue.CreateNull 方法。

语法

Python

def CreateNull() -> CDocBuilderValue

C++

static CDocBuilderValue CreateNull();

Java

CDocBuilderValue createNull();

.Net

static CDocBuilderValue^ CreateNull();

示例

Python

builder = docbuilder.CDocBuilder()
context = builder.GetContext()
globalObj = context.GetGlobal()
api = globalObj["Api"]
null = api.CreateNull()

C++

std::wstring sWorkDirectory = NSUtils::GetBuilderDirectory();
CDocBuilder::Initialize(sWorkDirectory.c_str());
CDocBuilder oBuilder;
CContext oContext = oBuilder.GetContext();
CValue oGlobal = oContext.GetGlobal();
CValue oApi = oGlobal["Api"];
CValue oNull = oApi.CreateNull();
CDocBuilder::Dispose();

Java

CDocBuilder.initialize("");
CDocBuilder builder = new CDocBuilder();
CDocBuilderContext context = builder.getContext();
CDocBuilderValue global = context.getGlobal();
CDocBuilderValue api = global.get("Api");
CDocBuilderValue nullValue = api.createNull();
CDocBuilder.dispose();

.Net

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