C#实现统计字数功能的方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace Program18
{
 public partial class FormMain : Form
 {
  public FormMain()
  {
   InitializeComponent();
  }
  private void btnRead_Click(object sender, EventArgs e)
  {
   try
   {
    txtWords.Text = File.ReadAllText(txtFileAddr.Text);
   }
   catch (Exception ex)
   { 
    MessageBox.Show(ex.Message);
   }
  }
  private void txtWords_TextChanged(object sender, EventArgs e)
  {
   int iAllChr = 0; //字符总数：不计字符'\n'和'\r'
   int iChineseChr = 0; //中文字符计数
   int iChinesePnct = 0;//中文标点计数
   int iEnglishChr = 0; //英文字符计数
   int iEnglishPnct = 0;//中文标点计数
   int iNumber = 0;  //数字字符：0-9
   foreach (char ch in txtWords.Text)
   {
    if (ch != '\n' && ch != '\r') iAllChr++;
    if ("～！＠＃￥％…＆（）—＋－＝".IndexOf(ch) != -1 ||
     "｛｝【】：“”；‘'《》，。、？｜＼".IndexOf(ch) != -1) iChinesePnct++;
    if (ch >= 0x4e00 && ch <= 0x9fbb) iChineseChr++;
    if ("`~!@#$%^&*()_+-={}[]:\";'<>,.?/\\|".IndexOf(ch) != -1) iEnglishPnct++;
    if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) iEnglishChr++;
    if (ch >= '0' && ch <= '9') iNumber++;
   }
   string sStats = string.Format(string.Concat(
    "字符总数：{0}\r\n", "中文字符数：{1}\r\n", "中文标点数：{2}\r\n",
    "英文字符数：{3}\r\n", "英文标点数：{4}\r\n", "数字字符数：{5}\r\n"),
    iAllChr.ToString(), iChineseChr.ToString(), iEnglishChr.ToString(),
    iEnglishChr.ToString(), iEnglishPnct.ToString(), iNumber.ToString());
   txtStats.Text = sStats;
  }
 }
}