Question

今天我有一个程序可以张贴到我的网站, 但我需要将文件上传支持添加到我的程序( 用于jpg ) 。我有一个这样的问题, 只是让我的程序发布, 而现在经过许多小时后, 我无法让它与文件上传一起工作。

Today my code is not very good but it works and I m the only one using it. Here is my code, abit stripped but I hope you get the idea what I need help with. 谢谢!

(“ 更新文件” 是图像的输入字段名称)

public static string Post(string url, int id, string message)
{
    try
    {
        string param =
            string.Format(
                "MAX_FILE_SIZE=2097152&id={0}&com={1}&upfile", id, message);

        byte[] bytes = Encoding.ASCII.GetBytes(param);

        var post = (HttpWebRequest)WebRequest.Create(url);

        post.ProtocolVersion = HttpVersion.Version10;
        post.Method = "POST";
        post.AllowAutoRedirect = false;
        post.ContentType = "application/x-www-form-urlencoded";
        post.ContentLength = bytes.Length;

        post.UserAgent =
            "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.15) Gecko/2009101601 Firefox/3.0.15 (.NET CLR 3.5.30729)";
        post.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";

        Stream requestStream = post.GetRequestStream();
        requestStream.Write(bytes, 0, bytes.Length);
        requestStream.Close();

        var webResponse = (HttpWebResponse)post.GetResponse();
        var sr = new StreamReader(webResponse.GetResponseStream());
        return sr.ReadToEnd();
    }
    catch (Exception exception)
    {
        return null;
    }
}

Edit: Sorry for my poor explanation here is what I need help with: I use the method above today to post on my site, but I need add support to upload files in my method. I can t change how the webpage works in the close future so it have to be done by using a POST request. I can t get it to work then I try to do it myself, so I m wondering if anybody could help me with what need to be added to read a image and post it with the request!

谢谢!

Answer 1

您需要使用多部分/ form- data 的编码, 而不是应用程序/ x- www- form- urlencoded, 然后您需要相应编码日志数据

见>HTTPWebrequest(mulpart/form-data)的上载文件

Answer 2

I m assuming you need a better solution than your current one. If you are on c#, there is a FILE upload control that you can use to upload files. You can even restrict it to the types of valid files that you allow.

控件为文件上载

Answer 3

Shouldnt your Content type be multipart/form-data; ? If it is possible for you to use a upload class I can make one available to you.

友情链接