rg1/server/tools/Base64ConvertTool/Form1.cs

using System;
using System.Text;
using System.Windows.Forms;

namespace Base64ConvertTool
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if(string.IsNullOrEmpty(textBoxSrc.Text))
            {
                return;
            }

            string strText = textBoxSrc.Text;

            byte[] byteText = Encoding.UTF8.GetBytes(strText);

            string strbase64 = Convert.ToBase64String(byteText);

            textBoxbase64.Text = strbase64;

            //校验一下
            byte[] checkbyte = Convert.FromBase64String(strbase64);

            string checkstr = Encoding.UTF8.GetString(checkbyte);

            if(checkstr != strText)
            {
                MessageBox.Show("convert error!");
            }
        }
    }
}