如何将图像转换为字节数组？ [英] How to convert image to byte array?

问题描述

我为windows phone app工作，如何将图像转换为字节数组？因为我必须保存在SqlLite数据库中。我试过下面的代码，但在'

I working for windows phone app, How to convert image to byte array? as i have to save in SqlLite datatabse. I tried below code, but gives error at '

WriteableBitmap 

'时出错 - 指针无效。

' - Invalid pointer.

public byte[] ImageToArray()
        {
            BitmapImage image = new BitmapImage();
            image.CreateOptions = BitmapCreateOptions.None;            
            image.UriSource = new Uri(image1.Source.ToString(), UriKind.Relative);
            WriteableBitmap wbmp = new WriteableBitmap(image);
            MemoryStream ms = new MemoryStream();
            wbmp.SaveJpeg(ms, wbmp.PixelWidth, wbmp.PixelHeight, 0, 100);
            return ms.ToArray();
        }

推荐答案

我还没有测试过，但这应该可以解决问题：

I haven't tested it, but this should do the trick:

public Byte[] BufferFromImage(this BitmapImage imageSource)
{
    Stream stream = imageSource.StreamSource;
    Byte[] buffer = null;
    if (stream != null && stream.Length > 0)
    {
        using (BinaryReader br = new BinaryReader(stream))
        {
            buffer = br.ReadBytes((Int32)stream.Length);
        }
    }

    return buffer;
}

这是一种扩展方法。你可以将它放在它自己的类中并像这样使用它：

This is an extention method. You would put this in it's own class and use it like this:

BitmapImage myImage = new BitmapImage();

...

byte[] imageBytes = myImage.ToByteArray();

转换为base64

convert to base64

 using (FileStream stream = new FileStream(indexFile.Path, FileMode.Open, FileAccess.Read))
{
    byte[] objByte = new byte[stream.length];
    string base64 =  base64 = Convert.ToBase64String(objByte);
}

File.ReadAllBytes（字符串路径）

File.ReadAllBytes( string path)

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