C# sharpziplib+；提取单个文件

每当我尝试获取文件时，输入流的长度（s.length）总是为零，我做错了什么？ZipEntry是有效的，并且具有适当的文件大小，等等

以下是我使用的代码：

public static byte[] GetFileFromZip(string zipPath, string fileName)
{
    byte[] ret = null;
    ZipFile zf = new ZipFile(zipPath);
    ZipEntry ze = zf.GetEntry(fileName);

    if (ze != null)
    {
        Stream s = zf.GetInputStream(ze);
        ret = new byte[s.Length];
        s.Read(ret, 0, ret.Length);
    }

    return ret;
}

---

输入流将没有长度。改用

ZipEntry.Size

public static byte[] GetFileFromZip(string zipPath, string fileName)
{
    byte[] ret = null;
    ZipFile zf = new ZipFile(zipPath);
    ZipEntry ze = zf.GetEntry(fileName);

    if (ze != null)
    {
        Stream s = zf.GetInputStream(ze);
        ret = new byte[ze.Size];
        s.Read(ret, 0, ret.Length);
    }

    return ret;
}