C＃似乎无法正确添加图像到ziparchive [英] C# can't seem to correctly add images to ziparchive

问题描述

我正在尝试将一堆文件添加到c＃中的zip文件中，但它似乎无法正常工作。

I'm trying to add a bunch of files to a zipfile in c# but it doesn't seem to work properly.

using (var memoryStream = new MemoryStream())
{
    using (var zip = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
    {
        for (int i = 0; i < kaart_data.GetLength(0); i++)
        {
            Image img = array[i];

            var file = zip.CreateEntry(i + ".bmp");
            using (var stream = new MemoryStream())
            {
                img.Save(stream, ImageFormat.Bmp);
                using (var entryStream = file.Open())
                {
                    stream.CopyTo(entryStream);
                }
            }
        }
    }

    //saves the archive to disk
    using (var fileStream = new FileStream(@"C:\Temp\test.zip", FileMode.Create))
    {
        memoryStream.Seek(0, SeekOrigin.Begin);
        memoryStream.CopyTo(fileStream);
    }
}

事情是它确实创建并保存了zip文件使用预期的文件大小进入磁盘。

The thing is it does create and save the zip file into disk with the expected file size.

但是当我尝试在Windows照片查看器中打开它们时，它们似乎已损坏。

But when I try to open them in windows photo viewer they seem to be corrupted.

任何帮助都表示赞赏。

推荐答案

几乎花了3个小时来弄清问题是什么。如果你看一下原始图像的大小并提取一个，就会有一点不同。

It almost took 3 hrs to figure out what's the issue. If u look at the the size of original image and extracted one, there's a tiny difference.

using (var memoryStream = new MemoryStream())
{
    using (var zip = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
    {
        for (var i = 0; i < images.Length; i++)
        {
            var img = images[i];
            var file = zip.CreateEntry(i + ".bmp");
            using (var stream = new MemoryStream())
            {
                img.Save(stream, ImageFormat.Bmp);
                using (var entryStream = file.Open())
                {
                    var bytes = stream.ToArray(); -- to keep it as image better to have it as bytes
                    entryStream.Write(bytes, 0, bytes.Length); 
                }
            }
        }
    }

    using (var fileStream = new FileStream(@"test.zip", FileMode.Create))
    {
        memoryStream.Seek(0, SeekOrigin.Begin);
        memoryStream.CopyTo(fileStream);
    }
}

我试过它就像魅力一样！

I've tried it it works like a charm!

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