如何在插入标记位于所选内容的开始位置的文本框中选择文本? [英] How to select text in a TextBox with the caret positioned at the START of the selection?

问题描述

我正在使用 System.Windows.Forms.TextBox .可以使用键盘来选择文本，以使插入符号位于所选内容的开始处-通过按住Shift键并将插入符号向左移动.

I'm using a System.Windows.Forms.TextBox. It is possible to select text by using the keyboard in such a way that the caret is positioned at the start of the selection - by holding Shift and moving the caret to the left.

我想通过编程来做同样的事情.

I would like to do the same programmatically.

例如，假设我有一个文本框为"Some sample text".我希望选择样本"一词，并且将插入符号定位在样本"中的"s"之前.

For example, suppose I have a text box with the text "Some sample text". I would like the "sample" word to be selected, and the caret to be positioned just before the "s" in "sample".

如果我这样做:

textbox.SelectionStart = 5;
textbox.SelectionLength = 6;

然后我选择了单词，但插入符号在样本"中的"e"之后.

then I get the word selected, but the caret is just after "e" in "sample".

如果我这样做:

textbox.SelectionStart = 11;
textbox.SelectionLength = -6;

我有例外.

如何将插入符号放置在选择的开始位置?

How can I position the caret at the start of the selection?

推荐答案

我无法编程.如 MSDN 本机Windows控件不管开始和结束的相对值如何，在结束位置都会显示闪烁的插入符号.

I don't that is possible to program. As it is stated in MSDN native windows controls displays a flashing caret at the end position regardless of the relative values of start and end.

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