C#在RichTexBox里选中某一行的字符

来源：互联网发布：cocostudio 3.10 mac 编辑：程序博客网时间：2024/05/16 18:12

 /// <summary>        /// 获取richTexBox行的字符长度        /// </summary>        /// <param name="rowNun"></param>        /// <returns></returns>        private Int32 GetLineCharacterCount(int rowNun)        {            String[] lines = log_textbox.Lines;            if (rowNun < 0 || rowNun > lines.Length - 1)            {                return -1;            }            return lines[rowNun].Length;        }private void log_textbox_MouseDoubleClick(object sender, MouseEventArgs e)        {            Int32 lineNum = log_textbox.GetLineFromCharIndex(log_textbox.SelectionStart);//获取首行的行号            Int32 lineCharCount = GetLineCharacterCount(lineNum);//            if (lineCharCount < 0)            {                MessageBox.Show("文本框里没有数据！", "提示");                return;            }            int selectStart = log_textbox.GetFirstCharIndexFromLine(lineNum);            log_textbox.Select(selectStart, lineCharCount);                 }