将 HttpClient 与 SOAP 结合使用

我一直在尝试使用 .Net Framework 4.7 中的 HTTPClient 对象来创建简单的 SOAP 请求。我已经使用了 Postman 中的参数，它工作得很好。这是我的代码：

 string url = "http://webservices.oorsprong.org/websamples.countryinfo/CountryInfoService.wso";

        //SOAP envelope string
        string xmlSOAP =
           @"<? xml version = ""1.0"" encoding = ""utf-8"" ?>
           < soap : Envelope xmlns: soap = ""http://schemas.xmlsoap.org/soap/envelope/"" >
                < soap:Body >
                    < ListOfContinentsByName xmlns = ""http://www.oorsprong.org/websamples.countryinfo"">         
                    </ ListOfContinentsByName >
                </ soap:Body >
           </ soap:Envelope >";

        HttpClient httpClient = new HttpClient();
        HttpContent httpContent = new StringContent(xmlSOAP);
        HttpResponseMessage response;

        HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Post, url);
        req.Headers.Add("SOAPAction", "");
        req.Method = HttpMethod.Post;
        req.Content = httpContent;
        req.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("text/xml; charset=utf-8");

        // Here you will get the Reponse from service
        response = await httpClient.SendAsync(req);
        // Converting the response into text format
        var responseBodyAsText = await response.Content.ReadAsStringAsync();

知道为什么这在邮递员中有效但不使用 HTTPClient 吗？我从这里的微软示例中引用了这一点（https://social.msdn.microsoft.com/Forums/windowsapps/en-US/15e0c692-c47c-443c-b96d-5c4f77e7ed66/how-to-sendreceive-soap-request-and-response-using-c-in- windows-phone-8?forum=wpdevelop https://social.msdn.microsoft.com/Forums/windowsapps/en-US/15e0c692-c47c-443c-b96d-5c4f77e7ed66/how-to-sendreceive-soap-request-and-response-using-c-in-windows-phone-8?forum=wpdevelop).

您的代码看起来不错并且应该可以工作。看来 API 服务器现在已关闭。

这是相同的代码，经过一些修复和改进，使其变得稳定

public class Program
{
    private static readonly HttpClient httpClient = new HttpClient();

    static async Task Main(string[] args)
    {
        string url = "http://webservices.oorsprong.org/websamples.countryinfo/CountryInfoService.wso";

        string xmlSOAP = @"<?xml version=""1.0"" encoding=""utf-8""?>
        <soap:Envelope xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"">
            <soap:Body>
            <ListOfContinentsByName xmlns=""http://www.oorsprong.org/websamples.countryinfo""/>         
            </soap:Body>
        </soap:Envelope>";

        try
        {
            string result = await PostSOAPRequestAsync(url, xmlSOAP);
            Console.WriteLine(result);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }

        Console.ReadKey();
    }

    private static async Task<string> PostSOAPRequestAsync(string url, string text)
    {
        using (HttpContent content = new StringContent(text, Encoding.UTF8, "text/xml"))
        using (HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, url))
        {
            request.Headers.Add("SOAPAction", "");
            request.Content = content;
            using (HttpResponseMessage response = await httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead))
            {
                //response.EnsureSuccessStatusCode(); // throws an Exception if 404, 500, etc.
                return await response.Content.ReadAsStringAsync();
            }
        }
    }
}

也许你还可以填写SOAPAction例如和url，但这取决于服务器要求。