如何在C#中的richtextbox中更改多种大小的字体? [英] How to change the font of multiple sizes in richtextbox in C#?

问题描述

我有一个富文本框，我想让它像写字板一样工作.我的问题是，例如，如果我使用 Calibri 字体输入123"，然后使用 Arial 字体输入456"并且我想更改 2345 的大小，它不会让我这样做，因为他们有两个不同的字体类型.这就是我遇到问题的地方:

I have a richtextbox and I would like to make it work like WordPad. My problem is that, for example, if I type "123" using the Calibri font, and then "456" using the Arial font and I want to change the size of 2345 it won't let me to do it because they have two different font types. This is where I have the problem:

private void combo_sizes_TextChanged(object sender, EventArgs e)
{
    if (rtb.SelectionFont == null)
    {
        rtb.SelectionFont = new Font(combo_fonts.Text, Convert.ToInt16(combo_sizes.Text));
    }
    rtb.SelectionFont = new Font(rtb.SelectionFont.FontFamily, Convert.ToInt16(combo_sizes.Text));
}

我知道当 rtb 中的选定文本包含多种字体时，SelectionFont 等于 null，因此在这种情况下，我已使其从两个组合框中获取选定文本的大小和字体，但我想更改大小而不会丢失其原始字体.有解决办法吗?

I know tha when the selected text in the rtb contains multiple fonts the SelectionFont equals to null, so in that case I have made it to get the selected text's size and font from two comboboxes, but I would like to change the size without losing its original font. Is there a solution?

谢谢

推荐答案

将您的 selected text 分解为 char s.获取每个 char 的字体，并更改其大小.

Break your selected text into chars. Get each char's Font, and change its size.

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