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我正在练习在同一个解决方案中使用 WCF 和两个项目。该服务应该从 northwnd db 获取信息,然后客户端显示它。

一切正常,直到我在我的接口/合同中添加了一个新的方法存根,GetSelectedCustomer(string companyName).

我已经实现了接口(使用智能标签来确定)。一切编译正常。但是,当从客户端的代码隐藏调用该方法时,它会抛出一个NotImplementedException.

我发现唯一看起来很奇怪的是,在智能意义上,图标GetSelectedCustomer是内部方法的图标,而其他图标则具有通常的公共方法图标。我不确定为什么会这样。

我的界面:

[ServiceContract(Namespace = "http://localhost/NorthWndSrv/")]
public interface INorthWndSrv
{
    [OperationContract]
    Customer GetSingleCustomer(string custID);

    [OperationContract]
    Customer GetSelectedCustomer(string companyName);

    [OperationContract]
    List<Customer> GetAllCustomers();

    [OperationContract]
    List<string> GetCustomerIDs();
}

[DataContract]
public partial class Customer
{
    [DataMember]
    public string Company { get; set; }
    [DataMember]
    public string Contact { get; set; }
    [DataMember]
    public string CityName { get; set; }
    [DataMember]
    public string CountryName { get; set; }
}

实施:

public class NorthWndSrv: INorthWndSrv
{
    public Customer GetSingleCustomer(string custID)
    {
        //stuff that works
    }

    public List<Customer> GetAllCustomers()
    {
        //stuff that works
    }

    public List<string> GetCustomerIDs()
    {
        //stuff that works 
    }

    public Customer GetSelectedCustomer(string companyName)
    {
        using (northwndEntities db = new northwndEntities())
        {
            Customer c = (from cust in db.CustomerEntities
                          where cust.CompanyName == companyName
                          select new Customer
                          {
                              Company = cust.CompanyName,
                              Contact = cust.ContactName,
                              CityName = cust.City,
                              CountryName = cust.Country
                          }).FirstOrDefault();
            return c;
        }
    }
}

页面代码隐藏中的 GridView 事件:

protected void GridViewCustomers_SelectedIndexChanged(object sender, EventArgs e)
{
    NorthWndServiceReference.NorthWndSrvClient Service = new NorthWndServiceReference.NorthWndSrvClient();
    string companyName = GridViewCustomers.SelectedRow.Cells[2].Text; //company name
    NorthWndServiceReference.Customer cust = Service.GetSelectedCustomer(companyName);
    ArrayList custList = new ArrayList();
    custList.Add(cust);
    DetailsViewCustomers.DataSource = custList;
    DetailsViewCustomers.DataBind();      
}
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1 回答 1

5

听起来您的服务正在调用实现程序集的过时版本。尝试清理项目,然后重建。

特别是,如果您正在使用依赖注入容器并且在您的项目中没有明确引用GetSelectedCompany实现的程序集,您可能看不到程序集的更新版本。添加显式引用或创建其他方式(例如构建后任务)以将程序集复制到正确的位置。

于 2011-12-12T11:06:05.867 回答