C# 在WCF服务中运行Oracle查询

我试图直接从我的WCF服务在Oracle数据库上运行查询并返回结果，但在winform程序中查询并返回结果的代码似乎与WCF服务不一样。我从conn.Open和cmd的代码中得到了几个错误。说它们是一个字段，但像一个类型一样使用。。。我想我可能把代码放错了地方或容器，所以我试着把它包装在一个类中，但这似乎也不起作用。出什么事了

    [OperationContract]
    CompositeType GetDataUsingDataContract(CompositeType composite);

    // TODO: Add your service operations here
    [OperationContract]
        string oradb = "Data Source=cecc-db1;User Id=dcsi;Password=dcsi;";
        OracleConnection conn = new OracleConnection(oradb);  // C#
        conn.Open();
        OracleCommand cmd = new OracleCommand();
        cmd.Connection = conn;
        cmd.CommandText = "select t2.meternumber, t1.blinkdate, t1.blinkcount from (select * from cecc_processed_blinks where trunc(blinkdate) between to_date('01-may-15', 'dd-mon-yy') and to_date('08-may-15', 'dd-mon-yy')) t1 left join meteraccts t2 on t1.serialnumber = t2.serialnumber order by t1.blinkdate desc";
        cmd.CommandType = CommandType.Text;
        OracleDataReader dr = cmd.ExecuteReader();
        dr.Read();
        //TODO display the results...
        conn.Dispose();
}

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我相信，以下就是你要找的。 要创建wcf服务，首先定义一个包含所有所需操作签名的协定，然后使用实现实现该协定

有关更多详细信息，请参阅

接口IMyService.cs：

namespace WcfServiceLibrary
{  
    [ServiceContract]
    public interface IMyService
    {
        [OperationContract]
        List<string> GetMeterBlinkData();
    }
}

namespace WcfServiceLibrary
{  
    public class MyService: IMyService
    {
        public List<string> GetMeterBlinkData()
        { 
           List<string> result = new List<string>(); 

           string oradb = "Data Source=cecc-db1;User Id=dcsi;Password=dcsi;";
           OracleConnection conn = new OracleConnection(oradb);  // C#
           conn.Open();
           OracleCommand cmd = new OracleCommand();
           cmd.Connection = conn;
           cmd.CommandText = "select t2.meternumber, t1.blinkdate, t1.blinkcount from (select * from cecc_processed_blinks where trunc(blinkdate) between to_date('01-may-15', 'dd-mon-yy') and to_date('08-may-15', 'dd-mon-yy')) t1 left join meteraccts t2 on t1.serialnumber = t2.serialnumber order by t1.blinkdate desc";
           cmd.CommandType = CommandType.Text;
           OracleDataReader dr = cmd.ExecuteReader();
           dr.Read();
            //TODO loop through results and fill the results object
           conn.Dispose();

           return result;
        }
    }
}

接口实现MyService.cs：

namespace WcfServiceLibrary
{  
    [ServiceContract]
    public interface IMyService
    {
        [OperationContract]
        List<string> GetMeterBlinkData();
    }
}

namespace WcfServiceLibrary
{  
    public class MyService: IMyService
    {
        public List<string> GetMeterBlinkData()
        { 
           List<string> result = new List<string>(); 

           string oradb = "Data Source=cecc-db1;User Id=dcsi;Password=dcsi;";
           OracleConnection conn = new OracleConnection(oradb);  // C#
           conn.Open();
           OracleCommand cmd = new OracleCommand();
           cmd.Connection = conn;
           cmd.CommandText = "select t2.meternumber, t1.blinkdate, t1.blinkcount from (select * from cecc_processed_blinks where trunc(blinkdate) between to_date('01-may-15', 'dd-mon-yy') and to_date('08-may-15', 'dd-mon-yy')) t1 left join meteraccts t2 on t1.serialnumber = t2.serialnumber order by t1.blinkdate desc";
           cmd.CommandType = CommandType.Text;
           OracleDataReader dr = cmd.ExecuteReader();
           dr.Read();
            //TODO loop through results and fill the results object
           conn.Dispose();

           return result;
        }
    }
}

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提供所有的代码，而不仅仅是服务的接口，包括上面的代码是如何包装在服务的实现中的。从PHP到C，我花了更长的时间。全新的世界！