public static string ImgToBase64String(Bitmap bmp)
{
try
{
MemoryStream ms = new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] arr = new byte[ms.Length];
ms.Position = ;
ms.Read(arr, , (int)ms.Length);
ms.Close();
return Convert.ToBase64String(arr);
}
catch (Exception ex)
{
return null;
}
}
只需要传入一个Bitmap对象，亲测可用哈。返回给前台时，将转换成base64的码前面加上
data:image/png;base64,
例如：
Bitmap bt;
string base64Img = ImgToBase64String(bt);
this.Image1.ImageUrl = "data:image/png;base64," + base64Img;