c# - XML 文档中存在错误...调用 Web 服务时

Question

我已经创建了一个 Web 服务和一个函数，它应该返回从一个普遍的数据库中检索到的 11000 条记录的列表

这是我在网络服务中的功能。

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
public class BBI : System.Web.Services.WebService
{
    [WebMethod]
    public List<myObject> getAll()
    {
        List<myObject> result = new List<myObject>();
        PsqlConnection conn = new PsqlConnection("Host=soemthing;Port=something;Database=something;Encoding=IBM861");
        conn.Open();
        string strSql = "select 0, 1, 2, 3, 4, 5 from something";
        PsqlCommand DBCmd = new PsqlCommand(strSql, conn);
        PsqlDataReader myDataReader;
        myDataReader = DBCmd.ExecuteReader();
        while (myDataReader.Read())
        {
            myObject b = new myObject();
            b.0 = Convert.ToInt32(myDataReader[0].ToString());
            b.1 = myDataReader[1].ToString();
            b.2 = myDataReader[2].ToString();
            b.3 = myDataReader[3].ToString();
            b.4 = myDataReader[4].ToString();
            b.5 = myDataReader[5].ToString();
            result.Add(b); 
        }
        conn.Close();
        myDataReader.Close();
        return result;
    }
}

然后我在我的客户端程序中添加对此 Web 服务的 Web 引用并调用引用 BBI。然后我调用 getAll 函数并得到错误:XML 文档 (1, 63432) 中存在错误。

public List<BBI.myObject> getAll()
{
    BBI.BBI bbi = new BBI.BBI();

    List<BBI.myObject> allBooks = bbi.getAll().OfType<BBI.myObject>().ToList(); 
    return allBooks;
}

这里是完整的异常细节

System.InvalidOperationException was unhandled by user code
  Message=There is an error in XML document (1, 71897).
  Source=System.Xml
  StackTrace:
       at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
       at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
       at BBI.BBI.getAllBooks() in c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vefur\73db60db\a4ee31dd\App_WebReferences.jl1r8jv6.0.cs:line 252
       at webServiceFuncions.getAllBooks() in c:\Documents and Settings\forritari\Desktop\Vefur - Nýr\BBI\trunk\Vefur\App_Code\webServiceFuncions.cs:line 59
  InnerException: System.Xml.XmlException
       Message='', hexadecimal value 0x01, is an invalid character. Line 1, position 71897.
       Source=System.Xml
       LineNumber=1
       LinePosition=71897
       SourceUri=""
       StackTrace:
            at System.Xml.XmlTextReaderImpl.Throw(Exception e)
            at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
            at System.Xml.XmlTextReaderImpl.Throw(Int32 pos, String res, String[] args)
            at System.Xml.XmlTextReaderImpl.ParseNumericCharRefInline(Int32 startPos, Boolean expand, StringBuilder internalSubsetBuilder, Int32& charCount, EntityType& entityType)
            at System.Xml.XmlTextReaderImpl.ParseCharRefInline(Int32 startPos, Int32& charCount, EntityType& entityType)
            at System.Xml.XmlTextReaderImpl.ParseText(Int32& startPos, Int32& endPos, Int32& outOrChars)
            at System.Xml.XmlTextReaderImpl.ParseText()
            at System.Xml.XmlTextReaderImpl.ParseElementContent()
            at System.Xml.XmlTextReaderImpl.Read()
            at System.Xml.XmlTextReader.Read()
            at System.Xml.XmlReader.ReadElementString()
            at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderBBI.Read2_Book(Boolean isNullable, Boolean checkType)
            at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderBBI.Read20_getAllBooksResponse()
            at Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer35.Deserialize(XmlSerializationReader reader)
            at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
       InnerException: 

数据库记录包含各种奇怪的符号，例如¤rmann Kr。 Einarsson 和 Tv” ‘fint∼ri

有人能看出我在这里做错了什么吗？

Answer 1

使用 SoapUI 使用服务，发送请求，然后查看返回的内容。如果它在 SoapUI 中看起来不错，那么您就知道它被正确地从数据库读取和馈送，问题可能出在您的客户端，可能与编码有关。如果它在 SoapUI 中看起来不对，那是服务器端或数据库中的数据有问题。

像 SoapUI 和 Fiddler 这样的工具非常适合中间人检查这类事情。当您不确定是服务器还是客户端出现问题时，将问题减半总是有帮助的。