是否知道Winforms TextBox中插入符号的点位置? [英] Knowing the point location of the caret in a Winforms TextBox?

问题描述

我需要知道插入符号当前所在的窗口的确切位置，以便可以在文本下方弹出一个小窗口(类似于智能感知或拼写检查器).问题是GetPositionFromCharIndex似乎不适用于TextBoxes.这就是我想要做的:

I need to know the exact point location in my window where the caret currently resides so that I can pop up a small window under the text (similar to intellisense or a spellchecker). The issue is that GetPositionFromCharIndex doesn't seem to work on TextBoxes. This is what I'm trying to do:

Point pt = mTextBox.GetPositionFromCharIndex(mTextBox.SelectionStart);
pt.Y = (int)Math.Ceiling(mTextBox.Font.GetHeight());
mListBox.Location = pt;

但是，GetPositionFromCharIndex始终为TextBoxes返回(0，0)(显然，它没有像RichTextBox那样实现).虽然此功能(和此代码)对于RichTextBoxes很好用，但我不想将其余代码从TextBox迁移到RichTextBox，除非是绝对的 LAST 方法.与RichTextBox/TextBox的兼容性很多，我必须重写我的代码中的很多大块来实现.

However, GetPositionFromCharIndex always returns (0, 0) for TextBoxes (apparently it isn't implemented like it is for RichTextBox). While this function (and this code) works fine for RichTextBoxes, I don't want to migrate the rest of my code from TextBox to RichTextBox except as an absolute LAST resort. There are so many incompatibilities with RichTextBox/TextBox that I'll have to rewrite a very large chunk of my code to do this.

有没有知道如何执行此操作的Winforms向导?

Are there any Winforms wizards out there who know how to do this?

推荐答案

如果您不介意使用Win32-API，请使用

If you don't mind using Win32-API use GetCaretPos to get the exact position.

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