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;

namespace ASCII
{
    public partial class Frm_Main : Form
    {
        public Frm_Main()
        {
            InitializeComponent();
        }

        private void Frm_Main_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {

        }
        private void bth_ToASCII_Click(object sender,EventArgs e)
        {
            if (txt_char.Text != string.Empty)
            {
                if (Encoding.GetEncoding("unicode").
                    GetBytes(new char[] { txt_char.Text[0] })[1] == 0)
                {
                    txt_ASCII.Text = Encoding.GetEncoding(
                        "unicode").GetBytes(txt_char.Text).ToString();
                }
                else
                {
                    txt_ASCII.Text = string.Empty;
                    MessageBox.Show("请输入字母！", "提示");           
                }
            }
        }
        private void bth_ToChar_Click(object sender, EventArgs e)
        {
            if (txt_ASCII2.Text != string.Empty)
            {
                int p_int_Num;
                if (int.TryParse(
                    txt_ASCII2.Text, out p_int_Num))
                {
                    txt_Char2.Text =
                        ((char)p_int_Num).ToString();
                }
                else
                {
                    MessageBox.Show(
                        "请输入正确的ASCII码值。", "错误");
                }
            }
        }
    }
}