c# - 可以在 RichtextBox 中加快线条的着色速度吗？

Question

问题

是否可以加快 RichtextBox 中线条的着色速度？

情况

我有日志文件，其中有错误的行必须用彩色显示。为此，我使用了性能很差的 RichttextBox 控件。

到目前为止我达到了什么

我已经这样做来加快速度:

• 使用Richedit50W instead of the default Richedit20
• 之前构建一个需要的行号列表(首先从磁盘本地读取日志)
• 避免在循环中使用 RichTextbox50.Lines.Count()

之后，我需要 11 秒来为 2000 行中的 100 行着色，而不是之前的 40 秒。

其他问题

还有其他几个问题，如提到的 Richedit50W关于加速 RichtextBox 或着色。但没有答案有助于加快着色。

我的代码

我还能做些什么来加快速度吗？

private void ColorizeLog(List<int> ErrorLines)
{
    // The List "ErrorLines" is filled with the wanted line numbers
    // and was build before filling the RichtextBow with the log data


    // Counting the lines before the for..next is 50% faster than:
    //      for (int lineNo = 0; lineNo < this.richTextbox50_Log.Lines.Count(); lineNo++)   
    //      in combination the other usage of "countLines" deeper in the code
    int countLines = this.richTextbox50_Log.Lines.Count();
    for (int lineNo = 0; lineNo < countLines; lineNo++)
    {

        if (ErrorLines.IndexOf(lineNo) >= 0)
        {
            int pos1 = this.richTextbox50_Log.GetFirstCharIndexFromLine(lineNo);
            int pos2 = lineNo < countLines  - 1 ?
                        this.richTextbox50_Log.GetFirstCharIndexFromLine(lineNo + 1) - 1 :
                        this.richTextbox50_Log.Text.Length;

            this.richTextbox50_Log.Select(pos1, pos2 - pos1);
            this.richTextbox50_Log.SelectionColor = Color.White;
            this.richTextbox50_Log.SelectionBackColor = Color.Red;
        }
}

Answer 1

For one of my projects, I have felt the need of a text editor with syntax highlighting. At first, I used a component inherited from RichTextBox, but while using it for a large amount of text I found out that RichTextBox highlights very slowly a large number of colored fragments (from 200 and more). When such highlighting has to be made in a dynamic way, it causes a serious problem.

http://www.codeproject.com/Articles/161871/Fast-Colored-TextBox-for-syntax-highlighting

我认为 RichTextBox 有时只是一个 b***...