数据合约成员相互引用时出错

Question

我有一个简单的数据合约，它有一个相互引用的数据成员，这里是数据成员：

 [DataContract(Namespace = "", Name = "ScaleTransactionHeaderMessage")]
public class ScaleTransactionHeaderMessage
{
    [DataMember]
    public int ScaleTransactionHeaderMessageId { get; set; }

    [DataMember]
    public string OperatorName { get; set; }

    [DataMember]
    public string Shift { get; set; }

    [DataMember]
    public string Source { get; set; }

    [DataMember]
    public string Destination { get; set; }

    **[DataMember]
    public List<ScaleTransactionDetailMessage> ScaleTransactionDetailMessages { get; set; }**

}

[DataContract(Namespace = "", Name = "ScaleTransactionDetailMessage")]
public class ScaleTransactionDetailMessage
{

    [DataMember]
    public int ScaleTransactionDetailMessageId { get; set; }

    [DataMember]
    public double Tonnage { get; set; }

    [DataMember]
    public DateTime TransactionDetailDate { get; set; }

    **[DataMember]
    public ScaleTransactionHeaderMessage scaleTransactionHeaderMessage { get; set; }**

}

这是导致问题的操作

        private static ScaleTransactionDetailMessage ConvertTransactionDetail(ScaleTransactionHeaderMessage headerMessage, ScaleTransactionDetail transactionDetail)
    {
        ScaleTransactionDetailMessage detailMessage = new ScaleTransactionDetailMessage
        {
            Tonnage = transactionDetail.Tonnage,
            TransactionDetailDate = transactionDetail.TransactionDetailDate,
            ScaleTransactionDetailMessageId = transactionDetail.TransactionDetailId,
           //TODO: Check why this is not working
            **scaleTransactionHeaderMessage = headerMessage**
        };
        return detailMessage;
    }

问题是每次我在 ScaleTransactionDetailMessage 数据合同中添加 ScaleTransactionHeaderMessage 时，我总是收到一个错误，提到连接超时，我确定这不是配置问题，因为如果我没有在操作合同中将值添加到 ScaleTransactionHeaderMessage服务可以正常运行。

我对操作进行了单元测试，它工作正常，问题只在调用服务时出现。

数据合约设计是否有错误？

Answer 1

您需要将IsReference = true 添加到DataContract：

[DataContract(IsReference=true]

看看here。