Question

我尝试将Base64字符串转换为图像并使用相同的图像设置ImageView。我知道如何在java中完成它，但我在C＃中遇到了麻烦。任何人都知道如何在C＃中完成它？

我尝试过的一些代码;

public Image Base64ToImage(string base64String)
 {
    // Convert base 64 string to byte[]
    byte[] imageBytes = Convert.FromBase64String(base64String);
    // Convert byte[] to Image
    using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
    {
        Image image = Image.FromStream(ms, true);
        return image;
    }
 }

Answer 1

Base64到位图：

public Bitmap Base64ToBitmap(String base64String)
{
    byte[] imageAsBytes = Base64.Decode(base64String, Base64Flags.Default);
    return BitmapFactory.DecodeByteArray(imageAsBytes, 0, imageAsBytes.Length);
}

Bitmap到Base64：

public String BitmapToBase64(Bitmap bitmap)
{
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    bitmap.Compress(Bitmap.CompressFormat.Png, 100, byteArrayOutputStream);
    byte[] byteArray = byteArrayOutputStream.ToByteArray();
    return Base64.EncodeToString(byteArray, Base64Flags.Default);
}

Answer 2

图片到Base64字符串，在线转换 - here

 public string ImageToBase64(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;
  }
}

Base64字符串到图像，在线转换 - here

    public Image Base64ToImage(string base64String)
{
  // Convert Base64 String to byte[]
  byte[] imageBytes = Convert.FromBase64String(base64String);
  MemoryStream ms = new MemoryStream(imageBytes, 0, 
    imageBytes.Length);

  // Convert byte[] to Image
  ms.Write(imageBytes, 0, imageBytes.Length);
  Image image = Image.FromStream(ms, true);
  return image;
}

Answer 3

我假设您的编码数据是某种位图格式？如果是这样，你应该能够做到这样的事情：

public Bitmap Base64ToImage(string base64String)
 {
    // Convert base 64 string to byte[]
    byte[] imageBytes = Convert.FromBase64String(base64String);
    // Convert byte[] to Image
    using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
    {
        Bitmap image = BitmapFactory.FromStream(ms, true);
        return image;
    }
 }

将Base64字符串转换为位图或图像Xamarin或Android

3 个答案: