将位图转换为字节数组

Convert a bitmap into a byte array(将位图转换为字节数组)

问题描述

使用 C#，是否有比保存到临时文件并使用 读取结果更好的方法将 Windows Bitmap 转换为 byte[]文件流?

Using C#, is there a better way to convert a Windows Bitmap to a byte[] than saving to a temporary file and reading the result using a FileStream?

推荐答案

有几种方法.

图像转换器

public static byte[] ImageToByte(Image img)
{
    ImageConverter converter = new ImageConverter();
    return (byte[])converter.ConvertTo(img, typeof(byte[]));
}

这个很方便，因为它不需要很多代码.

This one is convenient because it doesn't require a lot of code.

内存流

public static byte[] ImageToByte2(Image img)
{
    using (var stream = new MemoryStream())
    {
        img.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
        return stream.ToArray();
    }
}

这与您正在执行的操作相同，只是文件保存在内存中而不是磁盘中.虽然更多的代码您可以选择 ImageFormat 并且可以在保存到内存或磁盘之间轻松修改.

This one is equivalent to what you are doing, except the file is saved to memory instead of to disk. Although more code you have the option of ImageFormat and it can be easily modified between saving to memory or disk.

来源:http://www.vcskicks.com/image-to-byte.php

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