foreach控件C＃跳过控件 [英] foreach control c# skipping controls

问题描述

我有以下循环删除C＃Windows Forms应用程序中的按钮。唯一的问题是，它跳过了所有其他按钮。我该如何删除表单中的所有按钮控件？

I have the following loop to remove the buttons in my C# Windows Forms application. The only problem is that it skips every other button. How do I go about removing all the button controls from my form?

foreach (Control cntrl in Controls)
{
    if(cntrl.GetType() == typeof(Button))
    {
        Controls.Remove(cntrl);
        cntrl.Dispose();
    }
}

推荐答案

I认为这种方式更具可读性：

I think this way is a bit more readable:

var controlsToRemove = Controls.OfType<Button>().ToArray();
foreach (var control in controlsToRemove)
{
    Controls.Remove(control);
    cntrl.Dispose();
}

调用 ToArray（）创建一个新的具体集合，以便您可以枚举一个并修改另一个。

Calling ToArray() makes a new concrete collection, so that you can enumerate over one and modify the other.

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