Call Method (Expression, MethodInfo, Expression[])

Expression::Call Method (Expression^, MethodInfo^, array<Expression^>^)

 

Creates a MethodCallExpression that represents a call to a method that takes arguments.

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

public:
static MethodCallExpression^ Call(
	Expression^ instance,
	MethodInfo^ method,
	... array<Expression^>^ arguments
)

Parameters

instance
Type: System.Linq.Expressions::Expression^

An Expression that specifies the instance for an instance method call (pass null for a static (Shared in Visual Basic) method).

method
Type: System.Reflection::MethodInfo^

A MethodInfo to set the Method property equal to.

arguments
Type: array<System.Linq.Expressions::Expression^>^

An array of Expression objects to use to populate the Argumentscollection.

Return Value

Type: System.Linq.Expressions::MethodCallExpression^

A MethodCallExpression that has the NodeType property equal to Call and the Object, Method, and Arguments properties set to the specified values.

Exception Condition
ArgumentNullException

method is null.

-or-

instance is null and method represents an instance method.

-or-

arguments is not null and one or more of its elements is null.

ArgumentException

instance.Type is not assignable to the declaring type of the method represented by method.

-or-

The number of elements in arguments does not equal the number of parameters for the method represented by method.

-or-

One or more of the elements of arguments is not assignable to the corresponding parameter for the method represented by method.

To represent a call to a static (Shared in Visual Basic) method, pass in null for the instance parameter when you call this method, or call Call instead.

If method represents an instance method, the Type property of instance must be assignable to the declaring type of the method represented by method.

If arguments is not null, it must have the same number of elements as the number of parameters for the method represented by method. Each element in arguments must not be null and must be assignable to the corresponding parameter of method, possibly after quoting.

System_CAPS_noteNote

An element will be quoted only if the corresponding method parameter is of type Expression. Quoting means the element is wrapped in a Quote node. The resulting node is a UnaryExpression whose Operand property is the element of arguments.

The Arguments property of the resulting MethodCallExpression is empty if arguments is null. Otherwise, it contains the same elements as arguments, some of which may be quoted.

The Type property of the resulting MethodCallExpression is equal to the return type of the method represented by method.

Universal Windows Platform
Available since 4.5
.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
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