C# Base64转换为图片

 

 

 var base64 = "";
 base64 = base64.Replace("data:image/png;base64,", "").Replace("data:image/jgp;base64,", "").Replace("data:image/jpg;base64,", "").Replace("data:image/jpeg;base64,", "");//将base64头部信息替换
  byte[] bytes = Convert.FromBase64String(base64);
  MemoryStream memStream = new MemoryStream(bytes);
  Image mImage = Image.FromStream(memStream);

 

将图片存为本地：

 Bitmap bp = new Bitmap(mImage);
 MemoryStream ms = new MemoryStream();
 bp.Save(DateTime.Now.ToString("yyyyMMddHHss") + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);//注意保存路径