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/// <summary>
/// 把 Base64 转图片
/// </summary>
/// <param name="base64String"></param>
public static MemoryStream Base64ToImage(string base64String)
{
// base64String.Substring(0, base64String.Length / 40 * 40) 主要是 Base64 編碼長度有規定必須是 0 或 4 的整數倍,所以為免出錯,把長度處理一下
byte[] imageBytes = Convert.FromBase64String(base64String);
// byte[] imageBytes = Convert.FromBase64String(base64String.Substring(0,128));
MemoryStream _ms = new MemoryStream(imageBytes, 0, imageBytes.Length);
// Convert byte[] to Image
_ms.Write(imageBytes, 0, imageBytes.Length);
/*
System.Drawing.Image image = System.Drawing.Image.FromStream(ms, true);
image.Save(Server.MapPath("Report"), ImageFormat.Png);
*/
return _ms;
}
// 把图片转 Base64 编码
public static string ImageToBase64(System.Drawing.Image image, System.Drawing.Imaging.ImageFormat format)
{
using (MemoryStream ms = new MemoryStream())
{
// Convert Image to byte[]
image.Save(ms, format);
byte[] imageBytes = ms.ToArray();
// Convert byte[] to Base64 String
string base64String = Convert.ToBase64String(imageBytes);
return base64String;
}
}