执行DB2外部存储过程的问题

Question

我试图调用外部存储过程（调用RPG程序）。我不断收到以下错误：

"Exception Details: IBM.Data.DB2.iSeries.iDB2SQLErrorException: SQL0104 Token @SSN was not valid. Valid tokens: :."

这里是我的代码：

using (iDB2Connection conn = new iDB2Connection(_CONNSTRING)) 
{ 
    conn.Open(); 

    string sqlStatement = "MPRLIB.SIGNTIMESHEET (@SSN, @SIGNATURE, @WORKSTATION, @TOTALHOURS, @COMMENT)"; 
    //string sqlStatement = "MPRLIB.SIGNTIMESHEET (?, ?, ?, ?, ?)"; 

    iDB2Command cmd = conn.CreateCommand(); 
    cmd.CommandType = CommandType.StoredProcedure; 
    cmd.CommandText = sqlStatement; 
    cmd.Parameters.Add("@SSN", timesheet.EmployeeUniqueKey.ToString("0000000000")); 
    cmd.Parameters.Add("@SIGNATURE", timesheet.EmployeeTypedName); 
    cmd.Parameters.Add("@WORKSTATION", timesheet.EmployeeSignedComputer); 
    cmd.Parameters.Add("@TOTALHOURS", GetJobHoursTotal(timesheet.Id).ToString("00000.000").Replace(".", "")); 
    cmd.Parameters.Add("@COMMENT", timesheet.EmployeeComments); 

    cmd.ExecuteNonQuery(); 
    conn.Close(); 
} 

我似乎无法弄清楚发生了什么或者为什么我收到上述错误。我的连接字符串看起来像：

private const string _CONNSTRING = "DataSource=192.168.50.200;DefaultCollection=QMFILES;Naming=sql;UserID=XXX;Password=XXX;"; 

它可能是库列表问题？该程序只引用库列表中的一个文件。有什么建议么？

Answer 1

尝试这样的：

using (var conn = new iDB2Connection(_CONNSTRING)) 
using (var cmd = conn.CreateCommand()) 
{ 
    conn.Open(); 

    cmd.CommandType = CommandType.StoredProcedure; 
    cmd.CommandText = "MPRLIB.SIGNTIMESHEET"; 
    cmd.Parameters.Add("@SSN", timesheet.EmployeeUniqueKey.ToString("0000000000")); 
    cmd.Parameters.Add("@SIGNATURE", timesheet.EmployeeTypedName); 
    cmd.Parameters.Add("@WORKSTATION", timesheet.EmployeeSignedComputer); 
    cmd.Parameters.Add("@TOTALHOURS", GetJobHoursTotal(timesheet.Id).ToString("00000.000").Replace(".", "")); 
    cmd.Parameters.Add("@COMMENT", timesheet.EmployeeComments); 

    cmd.ExecuteNonQuery(); 
}