/// <summary>
/// 二进制Base64编码转图片
/// </summary>
/// <param name="bytes"></param>
/// <returns></returns>
public string ByteToPicture(string bytes)
{
string[] urls = bytes.Split(',');
string u = urls[];
byte[] by = Convert.FromBase64String(u);
MemoryStream ms = new System.IO.MemoryStream(by);
Bitmap bmImage = new Bitmap(ms);
string pName = Context.Server.MapPath("~/File/" + Guid.NewGuid().ToString() + ".png");
bmImage.Save(pName);
return pName;
}