C#中“With ... End With”的等价性? [重复]

时间:2021-12-08 13:58:41

This question already has an answer here:

这个问题在这里已有答案:

I know that C# has the using keyword, but using disposes of the object automatically.

我知道C#有using关键字,但是自动使用对象处理。

Is there the equivalence of With...End With in Visual Basic 6.0?

在Visual Basic 6.0中是否存在With ... End With的等价性?

6 个解决方案

#1


C# doesn't have an equivalent language construct for that.

C#没有相应的语言结构。

#2


It's not equivalent, but would this syntax work for you?

它不等同,但这种语法对你有用吗?

Animal a = new Animal()
{
    SpeciesName = "Lion",
    IsHairy = true,
    NumberOfLegs = 4
};

#3


There is no equivalent, but I think discussing a syntax might be interesting!

没有等价物,但我认为讨论语法可能很有趣!

I quite like;

我相当喜欢;

NameSpace.MyObject.
{
    active = true;
    bgcol = Color.Red;
}

Any other suggestions?

还有其他建议吗?

I cant imagine that adding this language feature would be difficult, essentially just a preprocessed.

我无法想象添加这种语言功能会很困难,基本上只是预处理。

EDIT:

I was sick of waiting for this feature, so here is and extension that achieves a similar behavior.

我厌倦了等待这个功能,所以这里和扩展实现了类似的行为。

/// <summary>
/// C# implementation of Visual Basics With statement
/// </summary>
public static void With<T>(this T _object, Action<T> _action)
{
    _action(_object);
}

Usage;

LongInstanceOfPersonVariableName.With(x => {
     x.AgeIntVar = 21;
     x.NameStrVar = "John";
     x.NameStrVar += " Smith";
     //etc..
});

EDIT: Interestingly it seems someone beat me to the punch, again, with this "solution". Oh well..

编辑:有趣的是,似乎有人用这个“解决方案”再次打败了我。那好吧..

#4


I think the equivalent of the following VB:

我认为相当于以下VB:

With SomeObjectExpression()
  .SomeProperty = 5
  .SomeOtherProperty = "Hello"
End With

Would be this is C#:

这将是C#:

{
  Var q=SomeOtherExpression();
  q.SomeProperty = 5;
  q.SomeOtherProperty = "Hello";
}

The only real difference is that in vb, the identifier doesn't have a name "q", but is simply a default identifier used when a period is encountered without any other identifier before it.

唯一真正的区别在于,在vb中,标识符没有名称“q”,而只是在遇到句点而没有任何其他标识符之前使用的默认标识符。

#5


There's no equivalent to With ... End With in C#.

没有相当于With ... End With in C#。

Here's a comparison chart for you that illustrates differences between Visual Basic and C#.

这是一个比较图表,说明了Visual Basic和C#之间的差异。

#6


There is no equivalent structure in C#. This is a Visual Basic 6.0 / VB.NET feature.

C#中没有等效的结构。这是Visual Basic 6.0 / VB.NET功能。

#1


C# doesn't have an equivalent language construct for that.

C#没有相应的语言结构。

#2


It's not equivalent, but would this syntax work for you?

它不等同,但这种语法对你有用吗?

Animal a = new Animal()
{
    SpeciesName = "Lion",
    IsHairy = true,
    NumberOfLegs = 4
};

#3


There is no equivalent, but I think discussing a syntax might be interesting!

没有等价物,但我认为讨论语法可能很有趣!

I quite like;

我相当喜欢;

NameSpace.MyObject.
{
    active = true;
    bgcol = Color.Red;
}

Any other suggestions?

还有其他建议吗?

I cant imagine that adding this language feature would be difficult, essentially just a preprocessed.

我无法想象添加这种语言功能会很困难,基本上只是预处理。

EDIT:

I was sick of waiting for this feature, so here is and extension that achieves a similar behavior.

我厌倦了等待这个功能,所以这里和扩展实现了类似的行为。

/// <summary>
/// C# implementation of Visual Basics With statement
/// </summary>
public static void With<T>(this T _object, Action<T> _action)
{
    _action(_object);
}

Usage;

LongInstanceOfPersonVariableName.With(x => {
     x.AgeIntVar = 21;
     x.NameStrVar = "John";
     x.NameStrVar += " Smith";
     //etc..
});

EDIT: Interestingly it seems someone beat me to the punch, again, with this "solution". Oh well..

编辑:有趣的是,似乎有人用这个“解决方案”再次打败了我。那好吧..

#4


I think the equivalent of the following VB:

我认为相当于以下VB:

With SomeObjectExpression()
  .SomeProperty = 5
  .SomeOtherProperty = "Hello"
End With

Would be this is C#:

这将是C#:

{
  Var q=SomeOtherExpression();
  q.SomeProperty = 5;
  q.SomeOtherProperty = "Hello";
}

The only real difference is that in vb, the identifier doesn't have a name "q", but is simply a default identifier used when a period is encountered without any other identifier before it.

唯一真正的区别在于,在vb中,标识符没有名称“q”,而只是在遇到句点而没有任何其他标识符之前使用的默认标识符。

#5


There's no equivalent to With ... End With in C#.

没有相当于With ... End With in C#。

Here's a comparison chart for you that illustrates differences between Visual Basic and C#.

这是一个比较图表,说明了Visual Basic和C#之间的差异。

#6


There is no equivalent structure in C#. This is a Visual Basic 6.0 / VB.NET feature.

C#中没有等效的结构。这是Visual Basic 6.0 / VB.NET功能。