我正在练习在同一解决方案中的两个项目中使用WCF。服务应该从northwnd数据库获取信息,然后客户端显示该信息。
一切正常,直到我在我的接口/契约中添加了一个新的方法存根,GetSelectedCustomer(string companyName)。
我已经实现了接口(可以肯定地说,使用了智能标记)。一切都编译正常。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。
我发现唯一看起来奇怪的是,在智能感知中,GetSelectedCustomer的图标是一个内部方法的图标,而其他的都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; }
}实现:
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();
}发布于 2011-12-12 19:06:06
听起来您的服务调用的是过期版本的实现程序集。尝试清理项目,然后重新构建。
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对实现GetSelectedCompany的程序集的显式引用,那么您很可能看不到该程序集的更新版本。添加显式引用或创建其他方法(例如,构建后任务)以将程序集复制到正确的位置。
https://stackoverflow.com/questions/8473164
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