检测粘贴到RichTextBox中 [英] Detecting a paste into a RichTextBox

问题描述

有什么方法可以将文本粘贴到RichTextBox中时检测到或导致事件触发？或者，也许已经有某种事件在粘贴文本时触发？顺便说一下，这就是Winforms C＃。

Is there some way I can detect or cause an event to fire whenever text is pasted into a RichTextBox? Or maybe there is already some kind of event that fires when text is pasted? This is Winforms C#, by the way.

推荐答案

因为并非所有人都可以使用Ctrl + V，而且还有其他方法可以将文本放入文本框（例如拖放），我走了一条不同的路线，如果有人正在寻找解决方案，我将在此处分享。

Because not all people may use Ctrl+V and because there are other ways to get text into a text box (such as drag and drop), I went a different route, which I will share here in case anyone else is looking for a solution.

我所做的是在班级中创建一个字段：

What I did was create a field in my class:

int _lastPosition = 0;

，在TextChanged（）事件中，我添加了以下内容：

and in the TextChanged() event I added the following:

if (SelectionStart - _lastPosition > 2)
{
    // Text was pasted into text box
}
_lastPosition = SelectionStart;

我假设如果一次在文本框中输入两个以上的字符，那么就必须粘贴文本，因为其他人一次只能输入两个以上的字符吗？所以无论如何，这对我有用。感谢所有尝试提供帮助的人。

I went under the assumption that if more then 2 characters were entered into the text box at a time, then text must have been pasted, because how else can someone input more then 2 characters at a time? So anyway, this worked for me. Thanks to everyone who tried to help.

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