复制文字到剪贴板 [英] Copy text to Clipboard

问题描述

我正在使用C＃/。NET应用程序。我想在工具栏上创建一个按钮，该按钮将基本上调用Ctrl + C（复制到剪贴板）。我查看了Clipboard类，但是问题是，因为我在表单上有多个文本框，所以我需要扫描哪个具有焦点以及是否选择了文本，以便从中选择文本，等等，所以我认为必须一线解决方案。

I am doing C#/.NET app. I want to make a button on toolbar that will basically invoke Ctrl+C (copy to clipboard). I looked to Clipboard class, but problem is since I have multiple textboxes on form, I would need to scan which one has focus and if/is selected text, in order to select text from it etc., so I think there must me "one-liner" solution.

有什么想法吗？

（此外，如何添加所有3项：剪切，复制，粘贴到工具栏，在相同条件下-主窗体上有多个tekstbox。）

(Also, how to add all 3: Cut, Copy, Paste to toolbar, under same conditions- multiple tekstboxes on main form..)

推荐答案

编辑：如果适用于Winforms。 。

Edit: If for Winforms..

将其放置在您的调用函数中：

Place this in your invoke function:

Clipboard.SetText(ActiveControl.Text);

下面由Daniel Abou Chleih提到：如果您必须与控件交互以调用该函数，焦点
将更改为该控件。

As mentioned below by Daniel Abou Chleih: If you have to interact with a control to invoke the function the focus will be changed to that control. This only works if you call it through other means.

编辑：
不是单线的，但适用于最后一个活动目录文本框：

Edit: Not a one-liner but works on the last active TextBox:

private Control lastInputControl { get; set; }
protected override void WndProc(ref Message m)
{
    // WM_SETFOCUS fired.
    if (m.Msg == 0x0007)
    {
        if (ActiveControl is TextBox)
        {
            lastInputControl = ActiveControl;
        }
    }

    // Process the message so that ActiveControl might change.
    base.WndProc(ref m);

    if (ActiveControl is TextBox && lastInputControl != ActiveControl)
    {
        lastInputControl = ActiveControl;
    }
}

public void CopyActiveText()
{
        if (lastInputControl == null) return;
        Clipboard.SetText(lastInputControl.Text);
}

现在，您可以调用CopyActiveText（）来获取失去焦点的最新TextBox最后或当前具有焦点。

Now you can call CopyActiveText() to get the most recent TextBox that lost focus last or currently has focus.

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