Question

我很难将REST方法用于RESTful服务。我的要求是我需要追加的一些参数（不在URL中）和我需要从文件中读取的2个参数。该服务是用Java编写的。

string url= "http://srfmdpimd2:18109/1010-SF-TNTIN/Configurator/rest/importConfiguration/"

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
FileStream file = new FileStream(@"TestSCDS.properties", FileMode.Open);
Byte[] bytes = new Byte[file.Length];
file.Read(bytes, 0, bytes.Length);
string strresponse = Encoding.UTF8.GetString(bytes);

request.Method = "POST";
request.ContentType = "multipart/form-data;";
request.ContentLength = file.Length;

request.Headers.Add("hhrr", "H010");
request.Headers.Add("env", "TEST");
request.Headers.Add("buildLabel", "TNTAL_05.05.0500_C54");

Stream Postdata = request.GetRequestStream();
Postdata.Write(bytes, 0, bytes.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();`

request.Headers.Add()正在向网址添加参数？如果没有，我如何在restful服务中向POST方法发送多个参数？

另外，如何从文件中读取参数并在POST方法中使用？

Answer 1

它需要一点腿部工作，编码字典并将其放入体内。以下是一个快速示例：

private string Send(string url)
{
        HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

        request.Method = "POST";

        string postData = EncodeDictionary(args, false);

        ASCIIEncoding encoding = new ASCIIEncoding();
        byte[] postDataBytes = encoding.GetBytes(postData);

        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = postDataBytes.Length;

        using(Stream requestStream = request.GetRequestStream())
        {
           requestStream.Write(postDataBytes, 0, postDataBytes.Length);
        }

        using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
        {
            StreamReader reader = new StreamReader(response.GetResponseStream());
            return reader.ReadToEnd();
        }
 }

private string EncodeDictionary(Dictionary<string, string> dict,
                                bool questionMark)
{
    StringBuilder sb = new StringBuilder();
    if (questionMark)
    {
        sb.Append("?");
    }
    foreach (KeyValuePair<string, string> kvp in dict)
    {
        sb.Append(HttpUtility.UrlEncode(kvp.Key));
        sb.Append("=");
        sb.Append(HttpUtility.UrlEncode(kvp.Value));
        sb.Append("&");
    }
    sb.Remove(sb.Length - 1, 1); // Remove trailing &
    return sb.ToString();
}

Answer 2

我不知道你的完整要求是什么，但我的强烈建议是“开始简单”。

不使用“内容类型：multipart / form-data”，除非您确定需要它。相反，从“application / x-www-form-urlencoded”（旧的最爱）或“application / json”开始（甚至更好）。

这是一个很好的小步骤示例。通过简单的Google搜索，你可以找到100多个字母：

http://www.asp.net/web-api/overview/web-api-clients/calling-a-web-api-from-a-net-client

在.net中向POST方法发送多个参数：

2 个答案: