IsNull

Returns true if the CDocBuilderValue object is null.

Please note, that for the .docbuilder file the CDocBuilderValue.IsNull method is not used.

Syntax

Python

def IsNull(self) -> bool

C++

bool IsNull();

COM

HRESULT IsNull([out, retval] VARIANT_BOOL* result);

Java

boolean isNull();

.Net

bool IsNull();

Parameters

COM

Name	Type	Description
result	VARIANT_BOOL*	Specifies whether the CDocBuilderValue object is null.

Example

Python

builder = docbuilder.CDocBuilder()
context = builder.GetContext()
globalObj = context.GetGlobal()
bNull = globalObj.IsNull()

C++

std::wstring sWorkDirectory = NSUtils::GetBuilderDirectory();
CDocBuilder::Initialize(sWorkDirectory.c_str());
CDocBuilder oBuilder;
CContext oContext = oBuilder.GetContext();
CValue oGlobal = oContext.GetGlobal();
bool bNull = oGlobal.IsNull();
CDocBuilder::Dispose();

COM

CoInitialize(NULL);
IONLYOFFICEDocBuilder* oBuilder = NULL;
IONLYOFFICEDocBuilderContext* oContext = NULL;
IONLYOFFICEDocBuilderValue* oGlobal = NULL;
VARIANT_BOOL b;
oBuilder->Initialize();
oBuilder->GetContext(&oContext);
oContext->GetGlobal(&oGlobal);
oGlobal->IsNull(&b);
oBuilder->Dispose();

Java

CDocBuilder.initialize("");
CDocBuilder builder = new CDocBuilder();
CDocBuilderContext context = builder.getContext();
CDocBuilderValue global = context.getGlobal();
boolean bNull = global.isNull();
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();
bool bNull = oGlobal.IsNull();
CDocBuilder.Destroy();