Form1.cs

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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;

namespace 人民币大小写转换
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        // 下载于www.51aspx.com
        private void button1_Click(object sender, EventArgs e)
        {
            gfVou_Format();
        }
        public void gfVou_Format()
        {
            double d = 0;
            try
            {
                d = Convert.ToDouble(textBox1.Text);
            }
            catch 
            {
                MessageBox.Show("输入的数据格式不正确","错误窗口",MessageBoxButtons.OK,MessageBoxIcon.Error);
                textBox1.Text="";
                textBox1.Focus();
                label2.Text = "";
                return;
            }
            string strLower = d.ToString("#0.00");
            if (strLower.Length > 16)
            {
                MessageBox.Show("数据溢出！", "错误窗口", MessageBoxButtons.OK, MessageBoxIcon.Error);
                textBox1.Text = "";
                textBox1.Focus();
                label2.Text = "";
                return;
            }
            string strUpart = null;
            string strUpper = null;
            int iTemp = 0;
            iTemp = 1;
            strUpper = "";
            while (iTemp <= strLower.Length)
            {
                switch (strLower.Substring(strLower.Length - iTemp, 1))
                {
                    case ".":
                        strUpart = "元";
                        break;
                    case "0":
                        strUpart = "零";