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我是 WCF webservices 的新手，我需要创建一种方法来接收一个包含非常多客户端的列表，然后在数据库中插入所有客户端。

Ater some search 我已经实现了这个

IService.cs

public interface IService1
{
   [OperationContract]
    int InsertClients(MyListofClients clients);
}

[DataContract]
public class MyListofClients
{
    [DataMember]
    List<Client> Clients { get; set; }
}

[DataContract]
public class Client
{
    [DataMember]
    public int clientId { get; set; }
    [DataMember]
    public string ClientName { get; set; }
    [DataMember]
    public List<Client> Clients { get; set; }
}
}

服务1.svc

   public int InsertClients(MyListofClients clients)
    {
        int res, result;
        using (NpgsqlConnection conn = new NpgsqlConnection(connStringFarm))
        {
            conn.Open();
            List<MyListofClients> firstStringList = new        List<MyListofClients>();
            string cmdStr = String.Format("Insert Into table (x1,x2)" +
                                           " VALUES(@x1,@x2)");

            foreach (var item in firstStringList)
            {
                NpgsqlCommand cmd = new NpgsqlCommand(cmdStr, conn);
                result = cmd.ExecuteNonQuery();
            }

            conn.Close();
            return 0;
           }

应用客户端

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles    Button1.Click
    Dim db_comm As New NpgsqlCommand
    Dim Reader As NpgsqlDataReader


    Dim query As String = "Select code1,name1 from clientes"
    db_comm.CommandText = query
    db_comm.Connection = conn
    conn.open
    Reader = db_comm.ExecuteReader

    Dim list As New List(Of String)

    While Reader.Read
        list.Add(Reader.GetString("code1"))
        list.Add(Reader.GetString("name1"))
    End While

    Dim API As APICS.Service1Client = New APICS.Service1Client()
    API.InsertClientsAsync(list)
End Sub

错误 “列表（字符串）”类型的值无法转换为“MyListofClients”。

有人可以帮助我吗？？

谢谢

4

1 回答 1

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您的服务方法需要 MyListOfClient 对象，但您正在传递字符串列表。

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles    Button1.Click
Dim db_comm As New NpgsqlCommand
Dim Reader As NpgsqlDataReader


Dim query As String = "Select code1,name1 from clientes"
db_comm.CommandText = query
db_comm.Connection = conn
conn.open
Reader = db_comm.ExecuteReader

Dim list As New List(Of String) -->  wrong; this should be MyListOfClient

While Reader.Read
    list.Add(Reader.GetString("code1"))
    list.Add(Reader.GetString("name1"))
End While

Dim API As APICS.Service1Client = New APICS.Service1Client()
API.InsertClientsAsyn(list) --> wrong; this should be MyListOfClient
于 2016-07-12T16:11:20.227 回答