Silverlight文件上传与原始创作,修改和&访问日期

时间:2013-03-20 16:46:31

标签: c# file-upload silverlight-5.0

我正在使用这些方法上传文件,

客户端:

    private void Add(object sender, MouseButtonEventArgs e)
    {
        OpenFileDialog OFD = new OpenFileDialog();
        OFD.Multiselect = true;
        OFD.Filter = "Python (*.py)|*.py";
        bool? Result = OFD.ShowDialog();
        if (Result != null && Result == true)
            foreach (var File in OFD.Files)
                mylistbox.Items.Add(File);
    }
    private void Submit(object sender, MouseButtonEventArgs e)
    {
        foreach (var File in mylistbox.Items)
            Process(((FileInfo)File).Name.Replace(((FileInfo)File).Extension, string.Empty), ((FileInfo)File).OpenRead());
    }
    private void Process(string File, Stream Data)
    {
        UriBuilder Endpoint = new UriBuilder("http://localhost:5180/Endpoint.ashx");
        Endpoint.Query = string.Format("File={0}", File);

        WebClient Client = new WebClient();
        Client.OpenWriteCompleted += (sender, e) =>
        {
            Send(Data, e.Result);
            e.Result.Close();
            Data.Close();
        };
        Client.OpenWriteAsync(Endpoint.Uri);
    }
    private void Send(Stream Input, Stream Output)
    {
        byte[] Buffer = new byte[4096];
        int Flag;

        while ((Flag = Input.Read(Buffer, 0, Buffer.Length)) != 0)
        {
            Output.Write(Buffer, 0, Flag);
        }
    }

服务器端:

    public void ProcessRequest(HttpContext Context)
    {
        using (FileStream Stream = File.Create(Context.Server.MapPath("~/" + Context.Request.QueryString["File"].ToString() + ".py")))
        {
            Save(Context.Request.InputStream, Stream);
        }
    }

    private void Save(Stream Input, FileStream Output)
    {
        byte[] Buffer = new byte[4096];
        int Flag;
        while ((Flag = Input.Read(Buffer, 0, Buffer.Length)) != 0)
        {
            Output.Write(Buffer, 0, Flag);
        }
    }

我的问题是,上传的文件有不同的创建,修改&访问日期
为什么?

1 个答案:

答案 0 :(得分:0)

当您上传文件时,您实际上是在创建一个包含重复内容的新文件。

从你的代码:

using (FileStream Stream = File.Create(Context.Server.MapPath("~/" + Context.Request.QueryString["File"].ToString() + ".py")))
{
    Save(Context.Request.InputStream, Stream);
}

File.Create负责新日期。

有关保留日期的信息,请参阅此answer