使用RichTextBox Control显示文本文件的所有字符

Question

我想阅读文本文件并在RichTextBox控件中 显示并显示所有可能的字符,包括ESC FF SO SI和空格.

我不知道怎么这样做.

这段代码没有帮助......

if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
    string text = File.ReadAllText(openFileDialog1.FileName);
    richTextBox1.Text = text;
}

任何线索？

Answer 1

一种方法是通过迭代加载文件中的所有字符来自己生成richtext,但是如果找到特殊的序列字符,则用序列的粗体/无字符/斜体名称替换它.请参阅http://sourceforge.net/projects/netrtfwriter/,了解如何使用这些格式化选项自行创建RTF文档,然后您可以将其提供给richTextBox.

编辑:好的,一个RTF作家可能对这项任务有点过分.RTFBox的可能性非常有限,但是这个可以.看看这个文件.

它包含从0到127的所有ASCII字符.以下是我的应用程序打印它们的方式:

代码很简单.我使用字典替换特殊字符,我使用这个SO问题的扩展来获得一些颜色.如果你想要更漂亮的着色和形成(如你的文字周围光滑,圆润的边缘),不要使用RichTextBox,但更先进的东西.这应该让你开始.

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Windows.Forms;

namespace FileViewer
{
    public partial class FileViewerForm : Form
    {
        public FileViewerForm()
        {
            InitializeComponent();
        }

        //Click handler.
        private void btnLoad_Click(object sender, EventArgs e)
        {
            //Ask them to select a file.
            openFileDialog.Title = "Please select a file";
            openFileDialog.Filter = "Any file|*.*";
            var dlgResult = openFileDialog.ShowDialog();
            if (dlgResult != DialogResult.OK)
                return;
            richTextBox1.Clear();

            //Get the text as a char array.
            char[] text = File.ReadAllText(openFileDialog.FileName).ToCharArray();

            //loop through all of them
            for (int i = 0; i < text.Length; i++)
            {
                //is this a special ASCII character?
                if (lSpecialDict.ContainsKey(text[i]))
                {
                    string replacement;
                    //get the replacement
                    lSpecialDict.TryGetValue(text[i], out replacement);
                    if (replacement != null)
                        //Print it out with DarkGray as backcolor, Firebrick as font color.
                        richTextBox1.AppendText("[" + replacement + "]", Color.LightGray, Color.Firebrick);
                }
                //just a normal character? Then append it.
                else
                    richTextBox1.AppendText(text[i].ToString());
            }
        }

        //Contains the substition strings for the characters. A char --> string mapping.
        private Dictionary<char, string> lSpecialDict 
            = new Dictionary<char, string>()
        {
            { '\0',      "NUL" }, {(char)0x01, "SOH" }, {(char)0x02, "STX" },
            {(char)0x03, "ETX" }, {(char)0x04, "EOT" }, {(char)0x05, "ENQ" },
            {(char)0x06, "ACK" }, {(char)0x07, "BEL" }, {(char)0x08, "BS"  },
            {(char)0x09, "HT"  }, {(char)0x0A, "LF"  }, {(char)0x0B, "VT"  },
            {(char)0x0C, "FF"  }, {(char)0x0D, "CR"  }, {(char)0x0E, "SO"  },
            {(char)0x0F, "SI"  }, {(char)0x10, "DLE" }, {(char)0x11, "DC1" },
            {(char)0x12, "DC2" }, {(char)0x13, "DC3" }, {(char)0x14, "DC4" },
            {(char)0x15, "NAK" }, {(char)0x16, "SYN" }, {(char)0x17, "ETB" },
            {(char)0x18, "CAN" }, {(char)0x19, "EM"  }, {(char)0x1A, "SUB" },
            {(char)0x1B, "ESC" }, {(char)0x1C, "FS"  }, {(char)0x1D, "GS"  },
            {(char)0x1E, "RS"  }, {(char)0x1F, "US"  }, {(char)0x7F, "DEL" },
        };

        private void FileViewerForm_Load(object sender, EventArgs e)
        {

        }
    }
    public static class RichTextBoxExtensions
    {
        public static void AppendText(this RichTextBox box, string text, System.Drawing.Color bgcolor, Color fontcolor)
        {
            box.SelectionStart = box.TextLength;
            box.SelectionLength = 0;

            var saved = box.SelectionBackColor;
            var saved2 = box.SelectionColor;
            box.SelectionBackColor = bgcolor;
            box.SelectionColor = fontcolor;
            box.AppendText(text);
            box.SelectionBackColor = saved;
            box.SelectionColor = saved2;
        }
    }
}