Richtextbox 在新文本前面加上颜色 [英] Richtextbox prepend new text with color

问题描述

我使用富文本框在我的 WinForms 中显示日志.

I have used a richtextbox to display logs in my WinForms.

使用的语言是 C#.

该软件用于插入银行分行的数据，新分行开始后我想用新颜色显示文本.

The software is used for inserting data of Bank Branches and after start of new Branch I want to display a text with new color.

我看到了链接 为 RichTextBox 字符串的不同部分着色 并成功实施.

I have seen the link Color different parts of a RichTextBox string and implemeted it successfully.

我的问题是我想添加新行而不是追加.即新行将显示在顶部.

My problem is I want to prepend the new line instead of append. That is the new line will be displayed on top.

我可以通过将代码更改为 box.Text=DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ":" + text + box 来做到这一点.文字

I am able to do this by changing the code to box.Text=DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ": " + text + box.Text

但是整个文本的颜色正在改变.

But the color is changing for the entire text.

这是用于追加的过程

            box.SelectionStart = box.TextLength;
        box.SelectionLength = 0;

        box.SelectionColor = color;

        box.AppendText(DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ": " + text);
        box.SelectionColor = box.ForeColor;

这就是我所做的:

            box.Text=DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ": " + text + box.text;
        box.SelectionStart = 0;
        box.SelectionLength = text.length;
        box.SelectionColor = color;

但这不起作用.

推荐答案

1) 从不直接更改已格式化的 RichtTextBox 的 Text 属性>

1) Never directly change the Text property of an already formatted RichtTextBox

2) 要追加，请使用 RTB.AppendText 函数

2) To append use the RTB.AppendText function

3) 要插入在任何other位置p，包括开头使用这个:

3) To insert at any other position p, including the beginning use this:

rtb.SelectionStart = s;            // set the cursor to the target position
rtb.Selection.Length = 0;          // nothing selected, yet
rtb.SelectedText = yourNewText;    // this inserts the new text 

现在您可以添加所需的格式:

Now you can add the formatting you want:

rtb.SelectionStart = s;            // now we prepare the new formatting..
rtb.SelectionLength = yourNewText.Length;   //.. by selecting the text
rtb.SelectionColor = Color.Blue;   // and/or whatever you want to do..
...

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