C# 不实现接口成员
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does not implement interface member
提问by Jason Wragg
Hi I have the following code but I keep getting the error:
嗨，我有以下代码，但我不断收到错误消息：
'JsonWcfService.GetVenues' does not implement interface member 'GetVenuesByLocation(string search)'.
'JsonWcfService.GetVenues' 没有实现接口成员 'GetVenuesByLocation(string search)'。
I am fairly new to C and .Net so most of this is cut and paste to be honest.
我对 C 和 .Net 相当陌生，所以说实话，大部分内容都是剪切和粘贴的。
Your help would be much appreciated.
您的帮助将不胜感激。
IGetVenues.cs
IGetVenues.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Web;
namespace JsonWcfService
{
[ServiceContract]
public interface IGetVenues
{
[OperationContract]
//attribute for returning JSON format
[WebInvoke(Method = "GET",
ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "json/Venues/search={search}")]
//method
List<Venue> GetAllVenuesMethod(string search);
[OperationContract]
[WebInvoke(Method = "GET",
ResponseFormat = WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "json/Venues/location={search}")]
List<Venueloc> GetVenuesByLocation(string search);
}
}
GetVenues.svc.cs
获取场地.svc.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Data.SqlClient;
namespace JsonWcfService
{
public class GetVenues : IGetVenues
{
public List<Venue> GetAllVenuesMethod(string search)
{
List<Venue> mylist = new List<Venue>();
using (SqlConnection conn = new SqlConnection("server=*****;database=******;Trusted_Connection=True;"))
{
conn.Open();
string cmdStr = String.Format("Select id,name,address1,town,postcode,lon,lat from venuesearch WHERE searchterm like @searchterm");
SqlCommand cmd = new SqlCommand(cmdStr, conn);
cmd.Parameters.Add(new SqlParameter("searchterm", "%" + Convert.ToString(search) + "%"));
SqlDataReader rd = cmd.ExecuteReader();
if (rd.HasRows)
{
while (rd.Read())
mylist.Add(new Venue(
rd.GetInt32(0),
//rd.GetString(1),
rd.IsDBNull(1) ? null : rd.GetString(1),
//rd.GetString(2),
rd.IsDBNull(2) ? null : rd.GetString(2),
//rd.GetString(3),
rd.IsDBNull(3) ? null : rd.GetString(3),
//rd.GetString(4)
rd.IsDBNull(4) ? null : rd.GetString(4),
//rd.GetString(4)
rd.IsDBNull(5) ? 0 : rd.GetDecimal(5),
//rd.GetString(4)
rd.IsDBNull(6) ? 0 : rd.GetDecimal(6)
));
}
conn.Close();
}
return mylist;
}
}
[DataContract]
public class Venue
{
[DataMember]
public Int32 id { get; set; }
[DataMember]
public string name { get; set; }
[DataMember]
public string address1 { get; set; }
[DataMember]
public string town { get; set; }
[DataMember]
public string postcode { get; set; }
[DataMember]
public Decimal lon { get; set; }
[DataMember]
public Decimal lat { get; set; }
public Venue(int venid, string venname, string venaddress1, string ventown, string venpostcode, decimal venlon, decimal venlat)
{
id = venid;
name = venname;
address1 = venaddress1;
town = ventown;
postcode = venpostcode;
lon = venlon;
lat = venlat;
}
public List<Venueloc> GetVenuesByLocation(string search)
{
List<Venueloc> mylist = new List<Venueloc>();
using (SqlConnection conn = new SqlConnection("server=***;database=******;Trusted_Connection=True;"))
{
conn.Open();
string cmdStr = String.Format("Select id,name,address1,town,postcode,lon,lat from venuesearch WHERE searchterm like @searchterm");
SqlCommand cmd = new SqlCommand(cmdStr, conn);
cmd.Parameters.Add(new SqlParameter("searchterm", "%" + Convert.ToString(search) + "%"));
SqlDataReader rd = cmd.ExecuteReader();
if (rd.HasRows)
{
while (rd.Read())
mylist.Add(new Venueloc(
rd.GetInt32(0),
//rd.GetString(1),
rd.IsDBNull(1) ? null : rd.GetString(1),
//rd.GetString(2),
rd.IsDBNull(2) ? null : rd.GetString(2),
//rd.GetString(3),
rd.IsDBNull(3) ? null : rd.GetString(3),
//rd.GetString(4)
rd.IsDBNull(4) ? null : rd.GetString(4),
//rd.GetString(4)
rd.IsDBNull(5) ? 0 : rd.GetDecimal(5),
//rd.GetString(4)
rd.IsDBNull(6) ? 0 : rd.GetDecimal(6)
));
}
conn.Close();
}
return mylist;
}
}
[DataContract]
public class Venueloc
{
[DataMember]
public Int32 id { get; set; }
[DataMember]
public string name { get; set; }
[DataMember]
public string address1 { get; set; }
[DataMember]
public string town { get; set; }
[DataMember]
public string postcode { get; set; }
[DataMember]
public Decimal lon { get; set; }
[DataMember]
public Decimal lat { get; set; }
public Venueloc(int venid, string venname, string venaddress1, string ventown, string venpostcode, decimal venlon, decimal venlat)
{
id = venid;
name = venname;
address1 = venaddress1;
town = ventown;
postcode = venpostcode;
lon = venlon;
lat = venlat;
}
}
}
The first function works but the second one doesn't.
第一个功能有效，但第二个无效。
采纳答案by Jeroen Vannevel
Your class GetVenuesdoes not implement the method mentioned in your error message. Where exactly are you stuck? GetVenuesByLocation(string search)is defined in the class Venue.
您的类GetVenues没有实现错误消息中提到的方法。你到底卡在哪里？GetVenuesByLocation(string search)在类中定义Venue。
I have noticed that this question is starting to garner interest. The issue here is very easy: your class does not implement (even if it's abstract, you have to define them) all methods defined in the interface. Your IDE should warn you of this before compiling.
我注意到这个问题开始引起人们的兴趣。这里的问题很简单：你的类没有实现（即使是abstract，你也必须定义它们）接口中定义的所有方法。您的 IDE 应该在编译之前警告您这一点。
回答by Alessandro D'Andria
Second function is inside the class Venue not in GetVenues, move it to GetVenues
第二个函数在类 Venue 中，不在 GetVenues 中，将其移动到 GetVenues
