WCF，StackOverflowException

Question

我在这一行得到了StackOverflowException。我是WCF的新手，但据我所知，它不是在无限循环中调用的。好吧，我希望有人可以解决这个问题。

 get { return LevStad; }

代码。

 // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IService
    {
        [OperationContract]
        string GetData(int value);
    [OperationContract]
    Kund GetDataUsingDataContract(Kund kund);

    // TODO: Add your service operations here
}
[DataContract]
public class Kund
{
    int iD;
    string fornamn = "";
    string efterNamn = "";
    string telefon = "";
    string boAdress = "";
    string boPostnummer = "";
    string boStad = "";
    string boLand = "";
    string levAdress = "";
    string levPostnummer = "";
    string levStad = "";
    string levLand = "";

    [DataMember]
    public int ID
    {
        get { return iD; }
        set { iD = value; }
    }

    [DataMember]
    public string Fornamn
    {
        get { return fornamn; }
        set { fornamn = value; }
    }
    [DataMember]
    public string EfterNamn
    {
        get { return efterNamn; }
        set { efterNamn = value; }
    }
    [DataMember]
    public string Telefon
    {
        get { return telefon; }
        set { telefon = value; }
    }
    [DataMember]
    public string BoAdress
    {
        get { return boAdress; }
        set { boAdress = value; }
    }
    [DataMember]
    public string BoPostnummer
    {
        get { return boPostnummer; }
        set { boPostnummer = value; }
    }
    [DataMember]
    public string BoStad
    {
        get { return boStad; }
        set { boStad = value; }
    }
    [DataMember]
    public string BoLand
    {
        get { return boLand; }
        set { BoLand = value; }
    }
    [DataMember]
    public string LevAdress
    {
        get { return levAdress; }
        set { levAdress = value; }
    }
    [DataMember]
    public string LevPostnummer
    {
        get { return levPostnummer; }
        set { levPostnummer = value; }
    }
    [DataMember]
    public string LevStad
    {
        get { return LevStad; }
        set { levStad = value; }
    }
    [DataMember]
    public string LevLand
    {
        get { return levLand; }
        set { levLand = value; }
    }
}

    public class Service : SQLBase, IService
    {
        public Service() : base()
        {

        }
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }
        public Kund GetDataUsingDataContract(Kund kund)
        {
            kund = new Kund();
            SqlCommand SQLCom = new SqlCommand(@"SELECT Kund.ID, Förnamn, Efternamn, Telefon, Adress, Postnummer, Stad, Land 
FROM Webbshop.dbo.Kund INNER JOIN Webbshop.dbo.Adress ON Kund.BoAdress = Adress.ID");
            SQLCom.Connection = DatabaseConnection;
            SQLCom.Connection.Open();
            SqlDataReader rdr = SQLCom.ExecuteReader(); 
            while (rdr.Read())
            {
                kund.ID = (int) rdr[0];
                kund.Fornamn = rdr[1].ToString().Trim();
                kund.EfterNamn = rdr[2].ToString().Trim();
                kund.Telefon = rdr[3].ToString().Trim();
                kund.BoAdress = rdr[4].ToString().Trim();
                kund.BoPostnummer = rdr[5].ToString().Trim();
                kund.BoStad = rdr[6].ToString().Trim();
                //kund.BoLand = rdr[7].ToString().Trim();
                //kund.LevAdress = rdr[8].ToString();
                //kund.LevPostnummer = rdr[9].ToString();
                //kund.LevStad = rdr[10].ToString();
                //kund.LevLand = rdr[11].ToString();
            }
            SQLCom.Connection.Close();
            return kund;
        }
    }

public class SQLBase
{
    protected static SqlConnection DatabaseConnection = new SqlConnection();
    public SQLBase()
    {
        DatabaseConnection.ConnectionString =
           "Data Source=(local);Initial Catalog=Webbshop;Integrated Security=True";
    }
}

Kund kund = null;// = new Kund();
using (ServiceReference.ServiceClient wcfClient = new ServiceReference.ServiceClient())
{
    kund = wcfClient.GetDataUsingDataContract(kund);
}

Answer 1

这是大写。它应该返回变量：

get { return levStad; }

现在，它正在返回它自己，它调用get，它返回自己...堆栈溢出。

---

BoLand也会遇到问题。 set将设置自己，将再次调用set ...，大写：

public string BoLand
{
    get { return boLand; }
    set { boLand = value; }
}

Answer 2

public string LevStad
{
    get { return LevStad; }
    set { levStad = value; }
}

有你的问题。它在LevStad上递归。

即。你得到LevStad并且它试图获得LevStad属性，它试图获得属性LevStad。所以它一直持续到调用堆栈溢出为止。

只需将其设置为字段（C＃区分大小写）。

public string LevStad
{
    get { return levStad; }
    set { levStad = value; }
}

在BoLand集上你会遇到类似的问题。

public string BoLand
{
    get { return boLand; }
    set { BoLand = value; }
}