Статья
11/18/2011

Expression.Condition Method (Expression, Expression, Expression, Type)

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

Creates a ConditionalExpression that represents a conditional statement.

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

Syntax

'Declaration
Public Shared Function Condition ( _
    test As Expression, _
    ifTrue As Expression, _
    ifFalse As Expression, _
    type As Type _
) As ConditionalExpression

public static ConditionalExpression Condition(
    Expression test,
    Expression ifTrue,
    Expression ifFalse,
    Type type
)

Parameters

test
Type: System.Linq.Expressions.Expression
An Expression to set the Test property equal to.

ifTrue
Type: System.Linq.Expressions.Expression
An Expression to set the IfTrue property equal to.

ifFalse
Type: System.Linq.Expressions.Expression
An Expression to set the IfFalse property equal to.

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

Return Value

Type: System.Linq.Expressions.ConditionalExpression
A ConditionalExpression that has the NodeType property equal to Conditional and the Test, IfTrue, and IfFalse properties set to the specified values.

Remarks

This method allows explicitly unifying the result type of the conditional expression in cases where the types of ifTrue and ifFalse expressions are not equal. Types of both ifTrue and ifFalse must be implicitly reference assignable to the result type. The type is allowed to be Void.

Version Information

Silverlight

Supported in: 5, 4

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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