如何使用Visual Studio (和/或ReSharper)从类字段生成构造函数？
如何使用Visual Studio (和/或ReSharper)从类字段生成构造函数？
提问于 2010-06-05 01:23:32
我已经习惯了许多Java (Eclipse、NetBeans和IntelliJ IDEA)为您提供一个命令，以便根据类中的字段为类生成默认构造函数。
例如：
public class Example
{
public decimal MyNumber { get; set; }
public string Description { get; set; }
public int SomeInteger { get; set; }
// ↓↓↓ This is what I want generated ↓↓↓
public Example(decimal myNumber, string description, int someInteger)
{
MyNumber = myNumber;
Description = description;
SomeInteger = someInteger;
}
}让构造函数填充对象的所有字段在大多数OOP语言中都是很常见的任务，我假设有一种方法可以节省我用C#编写这些样板代码的时间。我是C#世界的新手，所以我想知道我是不是错过了这门语言的一些基础知识？在Visual Studio中是否有一些显而易见的选项？
回答 7
Stack Overflow用户
发布于 2010-06-05 01:38:18
C#在Visual Studio2010中添加了一个新功能，称为从使用中生成。其目的是从使用模式生成标准代码。其中一个特性是基于初始化模式生成构造函数。
该功能可通过智能标记访问，智能标记将在检测到模式时出现。
例如，假设我有以下类
class MyType {
}我在我的应用程序中编写了以下代码
var v1 = new MyType(42);接受int的构造函数不存在，因此会出现一个智能标记，其中一个选项是“生成构造函数存根”。选择该选项将修改MyType的代码，如下所示。
class MyType {
private int p;
public MyType(int p) {
// TODO: Complete member initialization
this.p = p;
}
}Stack Overflow用户
发布于 2010-10-25 18:10:33
下面是我用来实现这个目的的宏。它将从具有私有setter的字段和属性生成构造函数。
Imports System
Imports EnvDTE
Imports EnvDTE80
Imports EnvDTE90
Imports EnvDTE90a
Imports EnvDTE100
Imports System.Diagnostics
Imports System.Collections.Generic
Public Module Temp
Sub AddConstructorFromFields()
DTE.UndoContext.Open("Add constructor from fields")
Dim classElement As CodeClass, index As Integer
GetClassAndInsertionIndex(classElement, index)
Dim constructor As CodeFunction
constructor = classElement.AddFunction(classElement.Name, vsCMFunction.vsCMFunctionConstructor, vsCMTypeRef.vsCMTypeRefVoid, index, vsCMAccess.vsCMAccessPublic)
Dim visitedNames As New Dictionary(Of String, String)
Dim element As CodeElement, parameterPosition As Integer, isFirst As Boolean = True
For Each element In classElement.Children
Dim fieldType As String
Dim fieldName As String
Dim parameterName As String
Select Case element.Kind
Case vsCMElement.vsCMElementVariable
Dim field As CodeVariable = CType(element, CodeVariable)
fieldType = field.Type.AsString
fieldName = field.Name
parameterName = field.Name.TrimStart("_".ToCharArray())
Case vsCMElement.vsCMElementProperty
Dim field As CodeProperty = CType(element, CodeProperty)
If field.Setter.Access = vsCMAccess.vsCMAccessPrivate Then
fieldType = field.Type.AsString
fieldName = field.Name
parameterName = field.Name.Substring(0, 1).ToLower() + field.Name.Substring(1)
End If
End Select
If Not String.IsNullOrEmpty(parameterName) And Not visitedNames.ContainsKey(parameterName) Then
visitedNames.Add(parameterName, parameterName)
constructor.AddParameter(parameterName, fieldType, parameterPosition)
Dim endPoint As EditPoint
endPoint = constructor.EndPoint.CreateEditPoint()
endPoint.LineUp()
endPoint.EndOfLine()
If Not isFirst Then
endPoint.Insert(Environment.NewLine)
Else
isFirst = False
End If
endPoint.Insert(String.Format(MemberAssignmentFormat(constructor.Language), fieldName, parameterName))
parameterPosition = parameterPosition + 1
End If
Next
DTE.UndoContext.Close()
Try
' This command fails sometimes '
DTE.ExecuteCommand("Edit.FormatDocument")
Catch ex As Exception
End Try
End Sub
Private Sub GetClassAndInsertionIndex(ByRef classElement As CodeClass, ByRef index As Integer, Optional ByVal useStartIndex As Boolean = False)
Dim selection As TextSelection
selection = CType(DTE.ActiveDocument.Selection, TextSelection)
classElement = CType(selection.ActivePoint.CodeElement(vsCMElement.vsCMElementClass), CodeClass)
Dim childElement As CodeElement
index = 0
For Each childElement In classElement.Children
Dim childOffset As Integer
childOffset = childElement.GetStartPoint(vsCMPart.vsCMPartWholeWithAttributes).AbsoluteCharOffset
If selection.ActivePoint.AbsoluteCharOffset < childOffset Or useStartIndex Then
Exit For
End If
index = index + 1
Next
End Sub
Private ReadOnly Property MemberAssignmentFormat(ByVal language As String) As String
Get
Select Case language
Case CodeModelLanguageConstants.vsCMLanguageCSharp
Return "this.{0} = {1};"
Case CodeModelLanguageConstants.vsCMLanguageVB
Return "Me.{0} = {1}"
Case Else
Return ""
End Select
End Get
End Property
End ModuleStack Overflow用户
发布于 2011-02-15 20:15:14
也许你可以试试这个：http://cometaddin.codeplex.com/
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/2976363
复制相关文章
相似问题