Question

我需要从网站上获取一些信息。该网站无意从浏览器访问。所以我们假设该网站包含一个字节数组：我想从控制台应用程序中获取该字节数组。

// c# code for asp website
protected byte[] data;
protected void Page_Load(object sender, EventArgs e)
{
    data = new byte[] { 1, 100, 200, 255 };  // the byte array that I want to send
}

// the asp content
<body>
    <form id="form1" runat="server">
       <div>
          <%=data%>
       </div>
   </form>
</body>

如果'data'是一个字符串，我可以通过解析以下代码中定义的responseFromServer变量来检索它。

        // Create a request using a URL that can receive a post. 
        WebRequest request = WebRequest.Create("http://localhost:4444/WebSite2/HelloFromC.aspx");
        // Set the Method property of the request to POST.
        request.Method = "POST";
        // Create POST data and convert it to a byte array.
        string postData = "This is a test that posts this string to a Web server.";
        byte[] byteArray = Encoding.UTF8.GetBytes(postData);
        // Set the ContentType property of the WebRequest.
        request.ContentType = "application/x-www-form-urlencoded";
        // Set the ContentLength property of the WebRequest.
        request.ContentLength = byteArray.Length;
        // Get the request stream.
        Stream dataStream = request.GetRequestStream();
        // Write the data to the request stream.
        dataStream.Write(byteArray, 0, byteArray.Length);
        // Close the Stream object.
        dataStream.Close();
        // Get the response.
        WebResponse response = request.GetResponse();
        // Display the status.
        Console.WriteLine(((HttpWebResponse)response).StatusDescription);
        // Get the stream containing content returned by the server.
        dataStream = response.GetResponseStream();
        // Open the stream using a StreamReader for easy access.
        StreamReader reader = new StreamReader(dataStream);
        // Read the content.
        string responseFromServer = reader.ReadToEnd();
        // Display the content.
        Console.WriteLine(responseFromServer);
        // Clean up the streams.
        reader.Close();
        dataStream.Close();
        response.Close();

我尝试过的事情：

我尝试将字节数组{1,100,200,255}转换为ASCII。然后使用编码类将其转换回字节数组。 ASCII的问题在于它不包含256个字符。也许我应该使用不同类型的编码。但我必须确保我的网站支持我使用的任何类型的编码......

Answer 1

使用与

类似的东西

byte[] myBinaryResponse = new byte[response.ContentLength];
response.GetResponseStream().Read (myBinaryResponse, 0, myBinaryResponse.Length);

Answer 2

继上述评论之后，您可能希望查看有关处理程序的本教程（正如克里斯热烈建议的那样）http://www.dotnetperls.com/ashx

这也可能有助于提供最终目标的更多细节。你总是试图推出一个字节数组吗？如果是这样，也许Web服务可能有所帮助。 A web service tutorial

您将如何使用此数据？在不同的网页或Windows应用程序中？

通过webrequest从asp.net网站接收byte []

2 个答案: