c# - Http post返回错误400错误请求asp.net c#

Question

Http post返回错误400 bad request，这是我的代码，你能看到我哪里出错了吗？我猜这与网址有关？

System.Collections.Specialized.NameValueCollection data = new System.Collections.Specialized.NameValueCollection();
        data["var1"] = source1;
        data["var2"] = source2;
        data["var3"] = source3;


    // HTTP post and redirect the values
    string str2 = string.Empty;

    System.Text.StringBuilder builder = new System.Text.StringBuilder();

    foreach (string str3 in data.AllKeys)
    {
        builder.Append(str2);
        builder.Append(HttpUtility.UrlEncode(str3));
        builder.Append("=");
        builder.Append(HttpUtility.UrlEncode(data[str3]));
        str2 = "&";
    }

    //Make a request
    string path = Request.Url.AbsoluteUri;
    string url = path + Target + builder;
    url = "http://localhost:1541/test/var1=SELEZIONA&var2=SELEZIONA&var3=SELEZIONA";
    WebRequest request = WebRequest.Create(url);
    request.Method = "POST";
    request.ContentType = "application/x-www-form-urlencoded";

    //Put the post data into the request
    byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(builder.ToString());

    request.ContentLength = byteArray.Length;
    Stream reqStream = request.GetRequestStream();
    reqStream.Write(byteArray, 0, byteArray.Length);
    reqStream.Close();

    //Get response
    System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
    response.Close();

我已将实际的 url 内容放在 url 变量中，以显示它当前尝试发送的内容。

Answer 1

您在 URL 中缺少用于分隔查询字符串的问号。我想这可能会导致这种错误。试试这个：

url = "http://localhost:1541/test/?var1=SELEZIONA&var2=SELEZIONA&var3=SELEZIONA";