项目
11/18/2011

Expression.MakeBinary Method (ExpressionType, Expression, Expression)

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

Creates a BinaryExpression, given the left and right operands, by calling an appropriate factory method.

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

Syntax

'Declaration
Public Shared Function MakeBinary ( _
    binaryType As ExpressionType, _
    left As Expression, _
    right As Expression _
) As BinaryExpression

public static BinaryExpression MakeBinary(
    ExpressionType binaryType,
    Expression left,
    Expression right
)

Parameters

binaryType
Type: System.Linq.Expressions.ExpressionType
The ExpressionType that specifies the type of binary operation.

left
Type: System.Linq.Expressions.Expression
An Expression that represents the left operand.

right
Type: System.Linq.Expressions.Expression
An Expression that represents the right operand.

Return Value

Type: System.Linq.Expressions.BinaryExpression
The BinaryExpression that results from calling the appropriate factory method.

Exceptions

Exception	Condition
ArgumentException	binaryType does not correspond to a binary expression node.
ArgumentNullException	left or right is nulla null reference (Nothing in Visual Basic).

Remarks

The binaryType parameter determines which BinaryExpression factory method this method calls. For example, if binaryType is Subtract, this method invokes Subtract.

Examples

The following example demonstrates how to use the MakeBinary(ExpressionType, Expression, Expression) method to create a BinaryExpression that represents the subtraction of one number from another.

' Create a BinaryExpression that represents subtracting 14 from 53.
Dim binaryExpression As System.Linq.Expressions.BinaryExpression = _
    System.Linq.Expressions.Expression.MakeBinary( _
        System.Linq.Expressions.ExpressionType.Subtract, _
        System.Linq.Expressions.Expression.Constant(53), _
        System.Linq.Expressions.Expression.Constant(14))

outputBlock.Text &= binaryExpression.ToString() & vbCrLf

' This code produces the following output:
'
' (53 - 14)

// Create a BinaryExpression that represents subtracting 14 from 53.
System.Linq.Expressions.BinaryExpression binaryExpression =
    System.Linq.Expressions.Expression.MakeBinary(
        System.Linq.Expressions.ExpressionType.Subtract,
        System.Linq.Expressions.Expression.Constant(53),
        System.Linq.Expressions.Expression.Constant(14));

outputBlock.Text += binaryExpression.ToString() + "\n";

// This code produces the following output:
//
// (53 - 14)

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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