Expression.Block 메서드

정의

네임스페이스:

System.Linq.Expressions

어셈블리:

System.Linq.Expressions.dll

BlockExpression을 만듭니다.

오버로드

Block(Type, IEnumerable<ParameterExpression>, IEnumerable<Expression>)	지정된 변수와 식이 포함된 BlockExpression을 만듭니다.
Block(Expression, Expression, Expression)	3개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.
Block(Expression, Expression, Expression, Expression, Expression)	5개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.
Block(Type, IEnumerable<ParameterExpression>, Expression[])	지정된 변수와 식이 포함된 BlockExpression을 만듭니다.
Block(Type, Expression[])	지정된 식을 포함하고 변수가 없으며 특정 결과 형식이 있는 BlockExpression을 만듭니다.
Block(Expression, Expression, Expression, Expression)	4개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.
Block(Expression, Expression)	2개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.
Block(IEnumerable<ParameterExpression>, Expression[])	지정된 변수와 식이 포함된 BlockExpression을 만듭니다.
Block(IEnumerable<ParameterExpression>, IEnumerable<Expression>)	지정된 변수와 식이 포함된 BlockExpression을 만듭니다.
Block(Expression[])	지정된 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.
Block(IEnumerable<Expression>)	지정된 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.
Block(Type, IEnumerable<Expression>)	지정된 식을 포함하고 변수가 없으며 특정 결과 형식이 있는 BlockExpression을 만듭니다.

Block(Type, IEnumerable<ParameterExpression>, IEnumerable<Expression>)

Source:

BlockExpression.cs

지정된 변수와 식이 포함된 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(Type ^ type, System::Collections::Generic::IEnumerable<System::Linq::Expressions::ParameterExpression ^> ^ variables, System::Collections::Generic::IEnumerable<System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (Type type, System.Collections.Generic.IEnumerable<System.Linq.Expressions.ParameterExpression>? variables, System.Collections.Generic.IEnumerable<System.Linq.Expressions.Expression> expressions);

static member Block : Type * seq<System.Linq.Expressions.ParameterExpression> * seq<System.Linq.Expressions.Expression> -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (type As Type, variables As IEnumerable(Of ParameterExpression), expressions As IEnumerable(Of Expression)) As BlockExpression

매개 변수

type

Type

블록의 결과 형식입니다.

variables

IEnumerable<ParameterExpression>

블록의 변수입니다.

expressions

IEnumerable<Expression>

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

Block(Expression, Expression, Expression)

Source:

BlockExpression.cs

3개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Linq::Expressions::Expression ^ arg0, System::Linq::Expressions::Expression ^ arg1, System::Linq::Expressions::Expression ^ arg2);

public static System.Linq.Expressions.BlockExpression Block (System.Linq.Expressions.Expression arg0, System.Linq.Expressions.Expression arg1, System.Linq.Expressions.Expression arg2);

static member Block : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Linq.Expressions.Expression -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (arg0 As Expression, arg1 As Expression, arg2 As Expression) As BlockExpression

매개 변수

arg0

Expression

블록의 첫 번째 식입니다.

arg1

Expression

블록의 두 번째 식입니다.

arg2

Expression

블록의 세 번째 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(Expression, Expression, Expression, Expression, Expression)

Source:

BlockExpression.cs

5개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Linq::Expressions::Expression ^ arg0, System::Linq::Expressions::Expression ^ arg1, System::Linq::Expressions::Expression ^ arg2, System::Linq::Expressions::Expression ^ arg3, System::Linq::Expressions::Expression ^ arg4);

public static System.Linq.Expressions.BlockExpression Block (System.Linq.Expressions.Expression arg0, System.Linq.Expressions.Expression arg1, System.Linq.Expressions.Expression arg2, System.Linq.Expressions.Expression arg3, System.Linq.Expressions.Expression arg4);

static member Block : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Linq.Expressions.Expression -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (arg0 As Expression, arg1 As Expression, arg2 As Expression, arg3 As Expression, arg4 As Expression) As BlockExpression

매개 변수

arg0

Expression

블록의 첫 번째 식입니다.

arg1

Expression

블록의 두 번째 식입니다.

arg2

Expression

블록의 세 번째 식입니다.

arg3

Expression

블록의 네 번째 식입니다.

arg4

Expression

블록의 다섯 번째 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(Type, IEnumerable<ParameterExpression>, Expression[])

Source:

BlockExpression.cs

지정된 변수와 식이 포함된 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(Type ^ type, System::Collections::Generic::IEnumerable<System::Linq::Expressions::ParameterExpression ^> ^ variables, ... cli::array <System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (Type type, System.Collections.Generic.IEnumerable<System.Linq.Expressions.ParameterExpression>? variables, params System.Linq.Expressions.Expression[] expressions);

static member Block : Type * seq<System.Linq.Expressions.ParameterExpression> * System.Linq.Expressions.Expression[] -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (type As Type, variables As IEnumerable(Of ParameterExpression), ParamArray expressions As Expression()) As BlockExpression

매개 변수

type

Type

블록의 결과 형식입니다.

variables

IEnumerable<ParameterExpression>

블록의 변수입니다.

expressions

Expression[]

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

Block(Type, Expression[])

Source:

BlockExpression.cs

지정된 식을 포함하고 변수가 없으며 특정 결과 형식이 있는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(Type ^ type, ... cli::array <System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (Type type, params System.Linq.Expressions.Expression[] expressions);

static member Block : Type * System.Linq.Expressions.Expression[] -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (type As Type, ParamArray expressions As Expression()) As BlockExpression

매개 변수

type

Type

블록의 결과 형식입니다.

expressions

Expression[]

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

Block(Expression, Expression, Expression, Expression)

Source:

BlockExpression.cs

4개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Linq::Expressions::Expression ^ arg0, System::Linq::Expressions::Expression ^ arg1, System::Linq::Expressions::Expression ^ arg2, System::Linq::Expressions::Expression ^ arg3);

public static System.Linq.Expressions.BlockExpression Block (System.Linq.Expressions.Expression arg0, System.Linq.Expressions.Expression arg1, System.Linq.Expressions.Expression arg2, System.Linq.Expressions.Expression arg3);

static member Block : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Linq.Expressions.Expression * System.Linq.Expressions.Expression -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (arg0 As Expression, arg1 As Expression, arg2 As Expression, arg3 As Expression) As BlockExpression

매개 변수

arg0

Expression

블록의 첫 번째 식입니다.

arg1

Expression

블록의 두 번째 식입니다.

arg2

Expression

블록의 세 번째 식입니다.

arg3

Expression

블록의 네 번째 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(Expression, Expression)

Source:

BlockExpression.cs

2개 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Linq::Expressions::Expression ^ arg0, System::Linq::Expressions::Expression ^ arg1);

public static System.Linq.Expressions.BlockExpression Block (System.Linq.Expressions.Expression arg0, System.Linq.Expressions.Expression arg1);

static member Block : System.Linq.Expressions.Expression * System.Linq.Expressions.Expression -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (arg0 As Expression, arg1 As Expression) As BlockExpression

매개 변수

arg0

Expression

블록의 첫 번째 식입니다.

arg1

Expression

블록의 두 번째 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(IEnumerable<ParameterExpression>, Expression[])

Source:

BlockExpression.cs

지정된 변수와 식이 포함된 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Collections::Generic::IEnumerable<System::Linq::Expressions::ParameterExpression ^> ^ variables, ... cli::array <System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (System.Collections.Generic.IEnumerable<System.Linq.Expressions.ParameterExpression>? variables, params System.Linq.Expressions.Expression[] expressions);

static member Block : seq<System.Linq.Expressions.ParameterExpression> * System.Linq.Expressions.Expression[] -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (variables As IEnumerable(Of ParameterExpression), ParamArray expressions As Expression()) As BlockExpression

매개 변수

variables

IEnumerable<ParameterExpression>

블록의 변수입니다.

expressions

Expression[]

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(IEnumerable<ParameterExpression>, IEnumerable<Expression>)

Source:

BlockExpression.cs

지정된 변수와 식이 포함된 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Collections::Generic::IEnumerable<System::Linq::Expressions::ParameterExpression ^> ^ variables, System::Collections::Generic::IEnumerable<System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (System.Collections.Generic.IEnumerable<System.Linq.Expressions.ParameterExpression>? variables, System.Collections.Generic.IEnumerable<System.Linq.Expressions.Expression> expressions);

static member Block : seq<System.Linq.Expressions.ParameterExpression> * seq<System.Linq.Expressions.Expression> -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (variables As IEnumerable(Of ParameterExpression), expressions As IEnumerable(Of Expression)) As BlockExpression

매개 변수

variables

IEnumerable<ParameterExpression>

블록의 변수입니다.

expressions

IEnumerable<Expression>

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

예제

다음 코드 예제에서는 블록 식에 매개 변수를 전달 하 고 블록 내에서이 매개 변수를 처리 하는 방법을 보여 있습니다.

// Add the following directive to your file:
// using System.Linq.Expressions;

// This block has a parameter expression
// that represents a variable within the block scope.
// It assigns a value to the variable,
// and then adds a constant to the assigned value.

ParameterExpression varExpr = Expression.Variable(typeof(int), "sampleVar");
BlockExpression blockExpr = Expression.Block(
    new ParameterExpression[] { varExpr },
    Expression.Assign(varExpr, Expression.Constant(1)),
    Expression.Add(varExpr, Expression.Constant(5))
);

// Print out the expressions from the block expression.
Console.WriteLine("The expressions from the block expression:");
foreach (var expr in blockExpr.Expressions)
    Console.WriteLine(expr.ToString());

Console.WriteLine("The result of executing the expression tree:");
// The following statement first creates an expression tree,
// then compiles it, and then executes it.
Console.WriteLine(
    Expression.Lambda<Func<int>>(blockExpr).Compile()());

// This code example produces the following output:
// The expressions from the block expression:
// (sampleVar = 1)
// (sampleVar + 5)
// The result of executing the expression tree:
// 6

' Add the following directive to your file:
' Imports System.Linq.Expressions  


' This block has a parameter expression
' that represents a variable within the block scope.
' It assigns a value to the variable,
' and then adds a constant to the assigned value. 

Dim varExpr As ParameterExpression = Expression.Variable(GetType(Integer), "sampleVar")
Dim blockExpr As BlockExpression = Expression.Block(
    New ParameterExpression() {varExpr},
    Expression.Assign(varExpr, Expression.Constant(1)),
    Expression.Add(varExpr, Expression.Constant(5))
)

' Print the expressions from the block expression.

Console.WriteLine("The expressions from the block expression:")
For Each expr In blockExpr.Expressions
    Console.WriteLine(expr.ToString())
Next

Console.WriteLine("The result of executing the expression tree:")

' The following statement first creates an expression tree,
' then compiles it, and then executes it.
Console.WriteLine(
    Expression.Lambda(Of Func(Of Integer))(blockExpr).Compile()())

' This code example produces the following output:
'
' The expressions from the block expression:
' (sampleVar = 1)
' (sampleVar + 5)
' The result of executing the expression tree:
' 6

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(Expression[])

Source:

BlockExpression.cs

지정된 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(... cli::array <System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (params System.Linq.Expressions.Expression[] expressions);

static member Block : System.Linq.Expressions.Expression[] -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (ParamArray expressions As Expression()) As BlockExpression

매개 변수

expressions

Expression[]

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

예제

다음 코드 예제에서는 블록 식을 만드는 방법을 보여줍니다. 블록 식은 두 MethodCallExpression 개의 개체와 하나의 ConstantExpression 개체로 구성됩니다.

// Add the following directive to your file:
// using System.Linq.Expressions;

// The block expression allows for executing several expressions sequentually.
// When the block expression is executed,
// it returns the value of the last expression in the sequence.
BlockExpression blockExpr = Expression.Block(
    Expression.Call(
        null,
        typeof(Console).GetMethod("Write", new Type[] { typeof(String) }),
        Expression.Constant("Hello ")
       ),
    Expression.Call(
        null,
        typeof(Console).GetMethod("WriteLine", new Type[] { typeof(String) }),
        Expression.Constant("World!")
        ),
    Expression.Constant(42)
);

Console.WriteLine("The result of executing the expression tree:");
// The following statement first creates an expression tree,
// then compiles it, and then executes it.
var result = Expression.Lambda<Func<int>>(blockExpr).Compile()();

// Print out the expressions from the block expression.
Console.WriteLine("The expressions from the block expression:");
foreach (var expr in blockExpr.Expressions)
    Console.WriteLine(expr.ToString());

// Print out the result of the tree execution.
Console.WriteLine("The return value of the block expression:");
Console.WriteLine(result);

// This code example produces the following output:
//
// The result of executing the expression tree:
// Hello World!

// The expressions from the block expression:
// Write("Hello ")
// WriteLine("World!")
// 42

// The return value of the block expression:
// 42

' Add the following directive to your file:
' Imports System.Linq.Expressions

' The block expression enables you to execute several expressions sequentually.
' When the block expression is executed,
' it returns the value of the last expression in the sequence.
Dim blockExpr As BlockExpression = Expression.Block(
    Expression.Call(
        Nothing,
        GetType(Console).GetMethod("Write", New Type() {GetType(String)}),
        Expression.Constant("Hello ")
       ),
    Expression.Call(
        Nothing,
        GetType(Console).GetMethod("WriteLine", New Type() {GetType(String)}),
        Expression.Constant("World!")
        ),
    Expression.Constant(42)
)

Console.WriteLine("The result of executing the expression tree:")
' The following statement first creates an expression tree,
' then compiles it, and then executes it.           
Dim result = Expression.Lambda(Of Func(Of Integer))(blockExpr).Compile()()

' Print the expressions from the block expression.
Console.WriteLine("The expressions from the block expression:")
For Each expr In blockExpr.Expressions
    Console.WriteLine(expr.ToString())
Next

' Print the result of the tree execution.
Console.WriteLine("The return value of the block expression:")
Console.WriteLine(result)

' This code example produces the following output:
'
' The result of executing the expression tree:
' Hello World!

' The expressions from the block expression:
' Write("Hello ")
' WriteLine("World!")
' 42

' The return value of the block expression:
' 42

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(IEnumerable<Expression>)

Source:

BlockExpression.cs

지정된 식을 포함하고 변수가 없는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(System::Collections::Generic::IEnumerable<System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (System.Collections.Generic.IEnumerable<System.Linq.Expressions.Expression> expressions);

static member Block : seq<System.Linq.Expressions.Expression> -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (expressions As IEnumerable(Of Expression)) As BlockExpression

매개 변수

expressions

IEnumerable<Expression>

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.

설명

블록 식이 실행되면 블록의 마지막 식 값을 반환합니다.

Block(Type, IEnumerable<Expression>)

Source:

BlockExpression.cs

지정된 식을 포함하고 변수가 없으며 특정 결과 형식이 있는 BlockExpression을 만듭니다.

public:
 static System::Linq::Expressions::BlockExpression ^ Block(Type ^ type, System::Collections::Generic::IEnumerable<System::Linq::Expressions::Expression ^> ^ expressions);

public static System.Linq.Expressions.BlockExpression Block (Type type, System.Collections.Generic.IEnumerable<System.Linq.Expressions.Expression> expressions);

static member Block : Type * seq<System.Linq.Expressions.Expression> -> System.Linq.Expressions.BlockExpression

Public Shared Function Block (type As Type, expressions As IEnumerable(Of Expression)) As BlockExpression

매개 변수

type

Type

블록의 결과 형식입니다.

expressions

IEnumerable<Expression>

블록의 식입니다.

반환

BlockExpression

만든 BlockExpression입니다.