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();
}