Nearth===023/c#高级控件应用设计(字符统计)

问题：

运行结果：

代码学习（部分关键代码------完整代码需要的，自己去我的下载中心下载）：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace CountProject
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void groupBox1_Enter(object sender, EventArgs e)
        {

        }

        private void toolStripTextBox1_Click(object sender, EventArgs e)
        {

        }

        private void saveFile_Click(object sender, EventArgs e)
        {
            DialogResult result = saveFileDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                string filename = saveFileDialog1.FileName;
                StreamWriter sw = new StreamWriter(filename, false, System.Text.Encoding.Default);
                sw.Write(richTextBox1.Text);
                sw.Close();
            }
            else
            {
                return;
            }
        }

        private void fastSave_Click(object sender, EventArgs e)
        {
            saveFile_Click(sender,e);
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            timeShow.Text = DateTime.Now.ToLongTimeString(); 
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string s = richTextBox1.Text;
            int count = 0;
            foreach(char c in s){
                count++;
            }
            countChar.Text ="统计字数为："+ count.ToString();
        }
    }
}