我正在尝试使用内存字符串从文件创建ZIP并保存。到目前为止,这是我的代码:

var zip = ZipFile.Create(Path.Combine(outputPath, fileName));
zip.BeginUpdate();

var fileStream = new MemoryStream(Encoding.Default.GetBytes(myStringVariable));
var outputMemStream = new MemoryStream();
var zipStream = new ZipOutputStream(outputMemStream);
var zipEntry = new ZipEntry("file.html");

zipEntry.DateTime = DateTime.Now;
zipStream.PutNextEntry(zipEntry);
StreamUtils.Copy(fileStream, zipStream, new byte[4096]);
zipStream.CloseEntry();
zip.Add(zipEntry);

zip.CommitUpdate();
zip.Close();


但是,它在zip.Add(zipEntry);上中断。并抛出异常:


  ZipException-条目不能包含任何数据


我以某种方式无法弄清楚出了什么问题。

最佳答案

您正在使用的ZipFile.Add方法替代用于将目录,卷标等添加到zip文件:如果传递包含数据的ZipException,则它为explicitly throws a ZipEntry

根据the documentation,如果要将内存数据添加到ZipFile,则需要使用Add(IStaticDataSource dataSource, string entryName)替代。您还需要创建IStaticDataSource的实现(以下内容摘自文档页面)。

因此,您的代码将类似于:

void Main()
{
    string outputPath = @"C:\Scratch\test.zip";
    string myStringVariable = "<html><head><title>Title</title></head><body>Hello World</body></html>";

    var zip = ZipFile.Create(outputPath);
    zip.BeginUpdate();

    var fileStream = new MemoryStream(Encoding.Default.GetBytes(myStringVariable));

    var dataSource = new CustomStaticDataSource();
    dataSource.SetStream(fileStream);

    zip.Add(dataSource, "file.html");

    zip.CommitUpdate();
    zip.Close();
}

public class CustomStaticDataSource : IStaticDataSource {
    private Stream _stream;
    // Implement method from IStaticDataSource
    public Stream GetSource() {
        return _stream;
    }

    // Call this to provide the memorystream
    public void SetStream(Stream inputStream) {
        _stream = inputStream;
        _stream.Position = 0;
    }
}

10-06 07:42