Expression::Constant Method (Object^, Type^)

.NET Framework (current version)

Creates a ConstantExpression that has the Value and Type properties set to the specified values.

Namespace: System.Linq.Expressions
Assembly: System.Core (in System.Core.dll)

Syntax

public:
static ConstantExpression^ Constant(
	Object^ value,
	Type^ type
)

Parameters

value: Type: System::Object^
An Object to set the Value property equal to.

type: Type: System::Type^
A Type to set the Type property equal to.

Return Value

Type: System.Linq.Expressions::ConstantExpression^

A ConstantExpression that has the NodeType property equal to Constant and the Value and Type properties set to the specified values.

Exceptions

Exception	Condition
ArgumentNullException	type is null.
ArgumentException	value is not null and type is not assignable from the dynamic type of value.

Remarks

This method can be useful for representing values of nullable types.

Examples

The following code example shows how to create an expression that represents a constant of the nullable type and set its value to null.

C++

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1