Expression.Call Method (Expression, MethodInfo, 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)

'Declaration
Public Shared Function Call ( _
	instance As Expression, _
	method As MethodInfo, _
	ParamArray arguments As Expression() _
) As MethodCallExpression

Parameters

instance
Type: System.Linq.Expressions.Expression
An Expression that specifies the instance fo an instance method call (pass Nothing for a static (Shared in Visual Basic) method).
method
Type: System.Reflection.MethodInfo
A MethodInfo to set the Method property equal to.
arguments
Type: System.Linq.Expressions.Expression()
An array of Expression objects to use to populate the Arguments collection.

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.

ExceptionCondition
ArgumentNullException

method is Nothing.

-or-

instance is Nothing and method represents an instance method.

-or-

arguments is not Nothing and one or more of its elements is Nothing.

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 Nothing 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 Nothing, 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 Nothing and must be assignable to the corresponding parameter of method, possibly after quoting.

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 Nothing. 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.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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