Articolo
11/18/2011

Expression.Call Method (Type, String, array<Type[], array<Expression[])

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Creates a MethodCallExpression that represents a call to a static (Shared in Visual Basic) method by calling the appropriate factory method.

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

Syntax

'Declaration
Public Shared Function Call ( _
    type As Type, _
    methodName As String, _
    typeArguments As Type(), _
    ParamArray arguments As Expression() _
) As MethodCallExpression

public static MethodCallExpression Call(
    Type type,
    string methodName,
    Type[] typeArguments,
    params Expression[] arguments
)

Parameters

type
Type: System.Type
The Type that specifies the type that contains the specified static (Shared in Visual Basic) method.

methodName
Type: System.String
The name of the method.

typeArguments
Type: array<System.Type[]
An array of Type objects that specify the type parameters of the generic method. This argument should be null when methodName specifies a non-generic method.

arguments
Type: array<System.Linq.Expressions.Expression[]
An array of Expression objects that represent the arguments to the method.

Return Value

Type: System.Linq.Expressions.MethodCallExpression
A MethodCallExpression that has the NodeType property equal to Call, the Method property set to the MethodInfo that represents the specified static (Shared in Visual Basic) method, and the Arguments property set to the specified arguments.

Exceptions

Exception	Condition
ArgumentNullException	type or methodName is nulla null reference (Nothing in Visual Basic).
InvalidOperationException	No method whose name is methodName, whose type parameters match typeArguments, and whose parameter types match arguments is found in type or its base types. -or- More than one method whose name is methodName, whose type parameters match typeArguments, and whose parameter types match arguments is found in type or its base types.

ArgumentNullException

type or methodName is nulla null reference (Nothing in Visual Basic).

InvalidOperationException

No method whose name is methodName, whose type parameters match typeArguments, and whose parameter types match arguments is found in type or its base types.

-or-

More than one method whose name is methodName, whose type parameters match typeArguments, and whose parameter types match arguments is found in type or its base types.

Remarks

The Type property of the resulting MethodCallExpression is equal to the return type of the method denoted by methodName. The Object property is nulla null reference (Nothing in Visual Basic).

Version Information

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

Platforms

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

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