XML 文档 (1,2) 中存在错误，System.InvalidOperationException: 不是预期的

从 API 发送的 XML

<AuthenticationResult xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<PAPIErrorCode>0</PAPIErrorCode>
<ErrorMessage/>
<AccessToken>StringAccessToken</AccessToken>
<AccessSecret>StringAccessToken</AccessSecret>
<PolarisUserID>PolarisSampleUser</PolarisUserID>
<BranchID>7</BranchID>
<AuthExpDate>2013-05-27T16:57:46.323</AuthExpDate>
</AuthenticationResult>

响应类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;

namespace PAPIAutomatedTestingTool
{
    [XmlRoot(ElementName="AuthorizationResult")]
    public class AuthorizationResult
    {
        public int PAPIErrorCode { get; set; }

        public string ErrorMessage { get; set; }

        public string AccessToken { get; set; }

        public string AccessSecret { get; set; }

        public int PolarisUserID { get; set; }

        public int BranchID { get; set; }

        public DateTime AuthExpDate { get; set; }
    }
}

代码发出请求并反序列化

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Net;
using System.Web;
using System.Web.Script.Serialization;
using System.Security.Cryptography;
using System.Xml;
using System.Xml.Serialization;

namespace PAPIAutomatedTestingTool
{
    public class APICallMethods
    {
        public string URI { get; set; }
        public string accSecret { get; set; }
        public string accToken { get; set; }
        public string authorizationString { get; set; }

        public bool AuthenticateStaffUser()
        {
            try
            {

            //Initializing all variables
            string authReqMethod = "POST";
            string authAccessKey = "Sample Access Key";
            string authAccessKeyID = "Sample Access ID";
            string authPatronPassword = "";
            DateTime authDateTime = DateTime.Now;
            string httpAuthDateTime = authDateTime.ToUniversalTime().ToString("r");
            string authURI = "Sample URI";


            //Composing the papiHash from the given parameters
            string papiHash = GetPAPIHash(authAccessKey, authReqMethod, authURI, httpAuthDateTime, authPatronPassword);
            //Formating the authorization string 
            string authorizationString = String.Format("Authorization: PWS {0}:{1}", authAccessKeyID, papiHash);


            //Creating and defining the WebRequest
            WebRequest req = WebRequest.Create(authURI);
            req.Method = "POST";
            req.Headers.Add("PolarisDate", httpAuthDateTime);
            req.Headers.Add(authorizationString);
            req.ContentType = "application/xml";
            string requestBody = "<AuthenticationData><Domain>SampleDomain</Domain><Username>SampleUsername</Username><Password>SamplePassword</Password></AuthenticationData>";
            byte[] reqBodyBytes = System.Text.Encoding.UTF8.GetBytes(requestBody);
            req.ContentLength = reqBodyBytes.Length;
            using (Stream requestStream = req.GetRequestStream())
            {
                requestStream.Write(reqBodyBytes, 0, reqBodyBytes.Length);
            }


            //Receiving the WebResponse
            using (WebResponse resp = req.GetResponse())
            {
                AuthorizationResult firstResponse = new AuthorizationResult();
                Stream respStream = resp.GetResponseStream();
                StreamReader sr = new StreamReader(respStream);


                XmlSerializer xmlSerializer = new XmlSerializer(typeof(AuthorizationResult));
                firstResponse = (AuthorizationResult)xmlSerializer.Deserialize(respStream);
                Console.WriteLine("Authorization: PWS" + firstResponse.AccessSecret + ":" + firstResponse.AccessToken);
                return true;
            }
        }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
                return false;
            }

        }


        public string GetPAPIHash(string strAccessKey, string strHTTPMethod, string strURI, string strHTTPDate, string strPatronPassword)
        {
            byte[] secretBytes = UTF8Encoding.UTF8.GetBytes(strAccessKey);
            HMACSHA1 hmac = new HMACSHA1(secretBytes);

            byte[] dataBytes = null;

            if (strPatronPassword.Length > 0)
            {
                dataBytes = UTF8Encoding.UTF8.GetBytes(strHTTPMethod + strURI + strHTTPDate + strPatronPassword);
            }
            else
            {
                dataBytes = UTF8Encoding.UTF8.GetBytes(strHTTPMethod + strURI + strHTTPDate);
            }
            byte[] computedHash = hmac.ComputeHash(dataBytes);
            string computedHashString = Convert.ToBase64String(computedHash);

            return computedHashString;
        }
    }
}

我正在向 API 发出 POST 请求，其正文包含 AuthorizationData。 API 应该返回 xml 以反序列化为firstresponse。我已收到 xml（通过打印到控制台确认），但我收到的是There is an error in the XML Document(1,2) and <AuthorizationData xmlns="">没想到。我在这里先向您的帮助表示感谢。

它似乎在抱怨一个意外的根元素，并且在您的问题的其他地方存在一些混乱。

在问题标题中你有<AuthorizationResult>

在示例 XML 响应中，您有<AuthenticationResult>

在 C# 中你有[XmlRoot(ElementName="AuthorizationResult")]

在你的问题最后你提到<AuthorizationData>

这是一个主题的一些微妙的变化。

假设 XML 示例响应是正确的，您应该更改 C# 以期望根元素是<AuthenticationResult>...

[XmlRoot(ElementName="AuthenticationResult")]
public class AuthenticationResult
{
    ...