从 ASP.NET 向桌面应用程序（客户端）发送文件

Question

我正在为桌面应用程序开发许可。一个简单的工作流程：

1. 用户的详细信息通过 HttpPost 方法提交到服务器（或其他）
2. 服务器检查详细信息并生成文件。
3. 服务器向用户发送文件（作为确认）

我需要关于第 3 步的帮助 - 如何向用户发送文件？

例如用户（HttpPost）

var client = new HttpClient();

var pairs = new List<KeyValuePair<string, string>>
{
    new KeyValuePair<string, string>("serialNumber", "AAAA"),
    new KeyValuePair<string, string>("email", "test@123"),
    new KeyValuePair<string, string>("HWID", "AAAA-BBBB-CCCC-DDDD"),
};

var content = new FormUrlEncodedContent(pairs);

var response = client.PostAsync("https://localhost:44302/testCom.aspx", content).Result;

if (response.IsSuccessStatusCode)
{
    //Code for file receiving?

}

服务器

protected void Page_Load(object sender, EventArgs e)
{
            //Check license ID

            //Issue license file - How to?

            //Mark database
}

Answer 1

您可以使用 Response 类将文件发送回客户端

 Response.Clear();
 Response.ClearHeaders();
 Response.ClearContent();
 Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
 Response.AddHeader("Content-Length", file.Length.ToString());
 Response.ContentType = "text/plain";
 Response.Flush();
 Response.TransmitFile(file.FullName);
 Response.End();

Answer 2

private void sendFile(string path, string fileName)
{
    FileStream fs = new FileStream(path, FileMode.Open);
    streamFileToUser(fs, fileName);
    fs.Close();
}

private void streamFileToUser(Stream str, string fileName)
{
    byte[] buf = new byte[str.Length];  //declare arraysize
    str.Read(buf, 0, buf.Length);

    HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
    HttpContext.Current.Response.AddHeader("Content-Length", str.Length.ToString());
    HttpContext.Current.Response.ContentType = "application/octet-stream";
    HttpContext.Current.Response.OutputStream.Write(buf, 0, buf.Length);
    HttpContext.Current.Response.End();
}