Base64 エンコード、デコード処理の Webアプリはこちらです。
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 Base64EncodeDecodeDemo
{
public partial class FormMain : Form
{
public FormMain()
{
InitializeComponent();
}
private void button_Encode_Click(object sender, EventArgs e)
{
string input = textBox_Input.Text;
Encoding enc = Encoding.GetEncoding(50220);
//Encoding enc = Encoding.GetEncoding("iso-2022-jp");
byte[] encstr = enc.GetBytes(input);
string base64str = Convert.ToBase64String(encstr);
textBox_Output.Text = base64str;
}
}
}
string input = textBox_Input.Text;
Encoding enc = Encoding.GetEncoding(50220);
//Encoding enc = Encoding.GetEncoding("iso-2022-jp");
byte[] encstr = enc.GetBytes(input);
string base64str = Convert.ToBase64String(encstr);
textBox_Output.Text = base64str;