CodeDirectionExpression 类
定义
表示用作方法调用参数及引用方向指示器的表达式。Represents an expression used as a method invoke parameter along with a reference direction indicator.
public ref class CodeDirectionExpression : System::CodeDom::CodeExpression
public class CodeDirectionExpression : System.CodeDom.CodeExpression
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class CodeDirectionExpression : System.CodeDom.CodeExpression
type CodeDirectionExpression = class
inherit CodeExpression
[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type CodeDirectionExpression = class
inherit CodeExpression
Public Class CodeDirectionExpression
Inherits CodeExpression
- 继承
- 属性
示例
下面的示例演示 CodeDirectionExpression 如何使用来指定要作为方法参数传递的表达式的字段方向修饰符。The following example demonstrates use of a CodeDirectionExpression to specify a field direction modifier for an expression to pass as a method parameter.
// Declares a parameter passed by reference using a CodeDirectionExpression.
array<CodeDirectionExpression^>^param1 = {gcnew CodeDirectionExpression( FieldDirection::Ref,gcnew CodeFieldReferenceExpression( gcnew CodeThisReferenceExpression,"TestParameter" ) )};
// Invokes a method on this named TestMethod using the direction expression as a parameter.
CodeMethodInvokeExpression^ methodInvoke1 = gcnew CodeMethodInvokeExpression( gcnew CodeThisReferenceExpression,"TestMethod",param1 );
// A C# code generator produces the following source code for the preceeding example code:
// this.TestMethod(ref TestParameter);
// Declares a parameter passed by reference using a CodeDirectionExpression.
CodeDirectionExpression param1 = new CodeDirectionExpression(FieldDirection.Ref, new CodeFieldReferenceExpression( new CodeThisReferenceExpression(), "TestParameter" ));
// Invokes a method on this named TestMethod using the direction expression as a parameter.
CodeMethodInvokeExpression methodInvoke1 = new CodeMethodInvokeExpression(new CodeThisReferenceExpression(), "TestMethod", param1 );
// A C# code generator produces the following source code for the preceeding example code:
// this.TestMethod(ref TestParameter);
' Declares a parameter passed by reference using a CodeDirectionExpression.
Dim param1 As New CodeDirectionExpression(FieldDirection.Ref, New CodeFieldReferenceExpression(New CodeThisReferenceExpression(), "TestParameter"))
' Invokes a method on this named TestMethod using the direction expression as a parameter.
Dim methodInvoke1 As New CodeMethodInvokeExpression(New CodeThisReferenceExpression(), "TestMethod", param1)
' A Visual Basic code generator produces the following source code for the preceeding example code:
' Me.TestMethod("TestParameter")
注解
CodeDirectionExpression 可以表示传递给方法的参数和参数的引用方向。CodeDirectionExpression can represent a parameter passed to a method and the reference direction of the parameter.
Expression属性指示向方向限定的表达式。The Expression property indicates the expression to qualify with a direction. Direction属性使用一个枚举值指示参数的方向 FieldDirection 。The Direction property indicates the direction of the parameter using one of the FieldDirection enumeration values.
备注
CodeDirectionExpression 旨在用作方法调用参数,不应在声明方法时使用。CodeDirectionExpression is intended to be used as a method invoke parameter, and should not be used when declaring methods.
构造函数
| CodeDirectionExpression() |
初始化 CodeDirectionExpression 类的新实例。Initializes a new instance of the CodeDirectionExpression class. |
| CodeDirectionExpression(FieldDirection, CodeExpression) |
使用指定的字段方向和表达式初始化 CodeDirectionExpression 类的新实例。Initializes a new instance of the CodeDirectionExpression class using the specified field direction and expression. |
属性
| Direction |
获取或设置此方向表达式的字段方向。Gets or sets the field direction for this direction expression. |
| Expression |
获取或设置要表示的代码表达式。Gets or sets the code expression to represent. |
| UserData |
获取当前对象的用户可定义数据。Gets the user-definable data for the current object. (继承自 CodeObject) |
方法
| Equals(Object) |
确定指定对象是否等于当前对象。Determines whether the specified object is equal to the current object. (继承自 Object) |
| GetHashCode() |
作为默认哈希函数。Serves as the default hash function. (继承自 Object) |
| GetType() |
获取当前实例的 Type。Gets the Type of the current instance. (继承自 Object) |
| MemberwiseClone() |
创建当前 Object 的浅表副本。Creates a shallow copy of the current Object. (继承自 Object) |
| ToString() |
返回表示当前对象的字符串。Returns a string that represents the current object. (继承自 Object) |