无法从C#中的Oracle存储过程中检索出params

时间:2013-03-08 15:23:08

标签: c# oracle stored-procedures output-parameter

这是我的存储过程(简单地尝试隔离问题,所以我现在正在做的就是设置OUT参数):

PROCEDURE DequeuePPLPlatformMsg(       msgType OUT VARCHAR2,       msgBody OUT VARCHAR2)     IS     BEGIN

    msgType := 'TESTTYPE';
    msgBody := 'TESTBODY';

END DequeuePPLPlatformMsg;

这是我的C#代码,用于调用存储过程并尝试获取OUT参数中的值:

            OConn = new OracleConnection();
            OConn.ConnectionString = "Password=mypw; User ID=myid; Data Source=devdb;";
            OConn.Open();
            OComm = new OracleCommand(StoredProc, OConn);
            OComm.CommandType = System.Data.CommandType.StoredProcedure;

        OComm.Parameters.Add("msgType", OracleDbType.Varchar2, 255, System.Data.ParameterDirection.Output);
        OComm.Parameters.Add("msgBody", OracleDbType.Varchar2, 255, System.Data.ParameterDirection.Output);

                int Result = OComm.ExecuteNonQuery();

                OConn.Close();

                String msgType = OComm.Parameters["msgType"].Value.ToString();
                String msgBody = OComm.Parameters["msgBody"].Value.ToString();

当我查看参数中的值时,它们包含空字符串。

有什么想法吗?谢谢!

2 个答案:

答案 0 :(得分:1)

对不起,这是详细信息......

这是存储过程:

程序DequeuePPLPlatformMsg(msgType OUT VARCHAR2,msgBody OUT VARCHAR2)已开始

msgType := 'TESTTYPE';
msgBody := 'TESTBODY';

END DequeuePPLPlatformMsg;

这是C#代码:

        OConn = new OracleConnection();
        OConn.ConnectionString = "Password=mypw; User ID=myid; Data Source=devdb;";
        OConn.Open();
        OComm = new OracleCommand(StoredProc, OConn);
        OComm.CommandType = System.Data.CommandType.StoredProcedure;

        OracleParameter msgTypeParam = new OracleParameter("msgType", OracleDbType.Varchar2);
        msgTypeParam.Direction = System.Data.ParameterDirection.Output;
        msgTypeParam.Value = "";
        msgTypeParam.Size = 255;
        OComm.Parameters.Add(msgTypeParam);

        OracleParameter msgBodyParam = new OracleParameter("msgBody", OracleDbType.XmlType);
        msgBodyParam.Direction = System.Data.ParameterDirection.Output;
        OComm.Parameters.Add(msgBodyParam);


            int Result = OComm.ExecuteNonQuery();

            OConn.Close();

            String msgType = msgTypeParam.Value.ToString();

msgType是String.Empty

谢谢!

答案 1 :(得分:0)

您是否尝试过按值访问它?

Dim retValParam As New OracleClient.OracleParameter("p_retVal", OracleClient.OracleType.VarChar)

retValParam.Direction = ParameterDirection.Output
retValParam.Size = 100
retValParam.Value = ""
command.Parameters.Add(retValParam)

command.ExecuteNonQuery()
retVal = retValParam.Value