ClearScript Library
ClearScript Library
ClearScript Library Reference
Microsoft.ClearScript
HostFunctions Class
HostFunctions Methods
asType<T> Method
cast<T> Method
del<T> Method
flags<T> Method
func Method
getElement Method
getProperty Method
isNull Method
isType<T> Method
isTypeObj Method
newArr Method
newObj Method
newVar<T> Method
proc Method
removeElement Method
removeProperty Method
setElement Method
setProperty Method
toByte Method
toChar Method
toDecimal Method
toDouble Method
toInt16 Method
toInt32 Method
toInt64 Method
toSByte Method
toSingle Method
toStaticType Method
toUInt16 Method
toUInt32 Method
toUInt64 Method
tryCatch Method
typeOf Method

# HostFunctionsisNull Method

Determines whether the specified value is null.
Namespace: Microsoft.ClearScript
Assembly: ClearScript.Core (in ClearScript.Core.dll) Version: 7.5.0
Syntax
C#
VB
C++
F#
Copy

    public bool isNull(
    	Object value
    )

    Public Function isNull (
    	value As Object
    ) As Boolean

    public:
    bool isNull(
    	Object^ value
    )

    member isNull :
            value : Object -> bool

#### Parameters

value Object
  The value to test.

#### Return Value

Boolean
True if value is null, false otherwise.
Remarks
Use this function to test field, property, and method return values when null result wrapping is in effect (see WrapNullResult and EnableNullResultWrapping).
See Also

#### Reference

HostFunctions Class
Microsoft.ClearScript Namespace
WrapNullResult
EnableNullResultWrapping

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