c# Base64編碼和圖片的互相轉換代碼

將圖片轉化爲Base64字符串的流程是：首先使用BinaryFormatter將圖片文件序列化爲二進制數據，而後使用Convert類的ToBase64String方法。將Base64字符串轉換爲圖片的流程正好相反：使用Convert類的FromBase64String獲得圖片文件的二進制數據，而後使用BinaryFormatter反序列化方法。

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

/// <summary>      /// 將圖片數據轉換爲Base64字符串      /// </summary>      /// <param name="sender"></param>      /// <param name="e"></param>      private void ToBase64( object sender, EventArgs e)      {        Image img = this .pictureBox.Image;        BinaryFormatter binFormatter = new BinaryFormatter();        MemoryStream memStream = new MemoryStream();        binFormatter.Serialize(memStream, img);        byte [] bytes = memStream.GetBuffer();        string base64 = Convert.ToBase64String(bytes);        this .richTextBox.Text = base64;      }        /// <summary>      /// 將Base64字符串轉換爲圖片      /// </summary>      /// <param name="sender"></param>      /// <param name="e"></param>      private void ToImage( object sender, EventArgs e)      {        string base64 = this .richTextBox.Text;        byte [] bytes = Convert.FromBase64String(base64);        MemoryStream memStream = new MemoryStream(bytes);        BinaryFormatter binFormatter = new BinaryFormatter();        Image img = (Image)binFormatter.Deserialize(memStream);        this .pictureBox.Image = img;      }