小编ADS*_*rko的帖子

我找到了重新编写旧代码的方法,这些代码将PDF文件签名为新文件,这标志着来自Web服务的MemoryStreams(字节数组).简单吧？那是昨天.今天我无法让它发挥作用.

这是旧代码,它使用FileStreams并且它可以工作:

    public static string OldPdfSigner(PdfReader pdfReader, string destination, string password, string reason, string location, string pathToPfx)
    {
        using (FileStream pfxFile = new FileStream(pathToPfx, FileMode.Open, FileAccess.Read))
        {
            ...

            using (PdfStamper st = PdfStamper.CreateSignature(pdfReader, new FileStream(destination, FileMode.Create, FileAccess.Write), '\0'))
            {
                PdfSignatureAppearance sap = st.SignatureAppearance;
                sap.SetCrypto(key, chain, null, PdfSignatureAppearance.WINCER_SIGNED);
                sap.Reason = reason;
                sap.Location = location;
                return destination;
            }
        }
    }

下面是我自己重做的内容,它抛出System.ObjectDisposedException:无法访问已关闭的Stream.

    public static byte[] PdfSigner(PdfReader pdfReader, string password, string reason, string location, string pathToPfx)
    {
        using (FileStream pfxFile = new FileStream(pathToPfx, FileMode.Open, …

我承认我对c#的经验很少,所以这可能很明显,但我不得不问 - 两个代码示例之间有什么区别吗？如果不明显,第一个语句会在new运算符的末尾省略().那里有什么区别或者()在这种情况下是多余的？

private static Dictionary<string, string> dict1 = new Dictionary<string, string>
{
    { "a", "A" },
    { "b", "B" }
};

private static Dictionary<string, string> dict2 = new Dictionary<string, string>()
{
    { "a", "A" },
    { "b", "B" }
};

我在.Net中编写了一个简单的例程,我需要从Java调用并检查退出值.出于某种原因,当从Java调用时,waitFor永远不会结束.这是因为从命令提示符调用时.Net例程很快就会结束,当从test.bat调用时它会正确返回-1.任何人都知道问题是什么？

这是Java代码:

public static int runOnceWait(String[] cmdarray) throws IOException, InterruptedException
{
    Process p;
    p = Runtime.getRuntime().exec(cmdarray);
    int res = p.waitFor();
    p.destroy();
    return res;
}

/**
 * @param args
 * @throws InterruptedException 
 * @throws IOException 
 */
public static void main(String[] args) throws IOException, InterruptedException
{
    String [] cmd = new String[2];
    cmd[0]=signer;
    cmd[1]=fileLocation;
    System.out.println ("\"" + cmd[0] + "\" \"" + cmd[1] + "\"");
    System.out.println (runOnceWait(cmd));
}

这是C#代码:

    static int Main(string[] args)
    {
        if (args.Length != 1 && args.Length != 2) …