错误的参数数量或类型 - .NET 应用程序中的 Oracle 错误

Question

我正在从 .Net 调用一个过程，但我一直收到错误消息，“调用 initiate_user_priv_app 时参数的数量或类型错误。我已经比较了参数、类型和我没有看到断开连接的地方。我有相同数量的参数，相同的顺序，相同类型的变量。任何帮助将不胜感激。谢谢！

 Procedure Initate_User_Priv_App
(
P_Cred_Provider_Id         In Cred_Provider.Cred_Provider_Id%Type,
P_Cred_Assignment_Id       In Cred_Assignment.Cred_Assignment_Id%Type,
P_Priv_Application_Mtf_Id  In Priv_Application.Priv_Application_Mtf_Id%Type,
P_Priv_Application_Type_Id In Priv_Application.Priv_Application_Type_Id%Type,
P_Person_Email_Txt         In Sys_Person_Email.Person_Email_Txt%Type,
P_Communication_Type_Id    In Sys_Person_Communication.Communication_Type_Id%Type,
P_Person_Communication_Txt In Sys_Person_Communication.Person_Communication_Txt%Type,
P_Audit_User_Id            In Sys_User.User_Id%Type,
P_Audit_User_Mtf_Id        In Mtf.Mtf_Id%Type,
P_Audit_Predecessor_Id     In Priv_Application.Audit_Predecessor_Id%Type,
P_Priv_Application_Id      Out Priv_Application.Priv_Application_Id%Type,
P_Result                   Out Varchar2,
P_Return_Code              Out Number


using (OracleConnection conn = new OracleConnection(this.connString))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = "sql_privileging_functions.initate_user_priv_app";

            #region Parameterization
            OracleParameter outputApplicationId = new OracleParameter("p_priv_application_id", OracleDbType.Decimal, 18, null, ParameterDirection.Output);
            OracleParameter outputResult = new OracleParameter("p_result", OracleDbType.Varchar2, 1000, null, ParameterDirection.Output);
            OracleParameter outputResultCode = new OracleParameter("p_return_code", OracleDbType.Decimal, 18, null, ParameterDirection.Output);

            cmd.Parameters.Add(new OracleParameter("p_cred_provider_id", credAssignment.CredProviderId));
            cmd.Parameters.Add(new OracleParameter("p_cred_assignment_id", credAssignment.CredAssignmentId));
            cmd.Parameters.Add(new OracleParameter("p_priv_application_mtf_id", credAssignment.AssignmentMtf));
            cmd.Parameters.Add(new OracleParameter("p_priv_application_type_id", credAssignment.PrivApplicationTypeId));
            cmd.Parameters.Add(new OracleParameter("p_person_email_txt", credAssignment.Email));
            cmd.Parameters.Add(new OracleParameter("p_communication_type_id", credAssignment.PhoneTypeId));
            cmd.Parameters.Add(new OracleParameter("p_person_communication_txt", credAssignment.Phone));
            cmd.Parameters.Add(new OracleParameter("p_audit_user_id", credAssignment.AuditUserId));
            cmd.Parameters.Add(new OracleParameter("p_audit_user_mtf_id", credAssignment.AuditUserMTFId));
            cmd.Parameters.Add(new OracleParameter("p_audit_user_predecessor_id", credAssignment.AuditUserId));
            cmd.Parameters.Add(new OracleParameter("p_priv_application_id", OracleDbType.Decimal, ParameterDirection.Output));
            cmd.Parameters.Add(new OracleParameter("p_result", OracleDbType.Varchar2, ParameterDirection.Output));
            cmd.Parameters.Add(new OracleParameter("p_return_code", OracleDbType.Decimal, ParameterDirection.Output));
            cmd.Parameters.Add(outputApplicationId);
            cmd.Parameters.Add(outputResult);
            cmd.Parameters.Add(outputResultCode);

            #endregion Parameterization

            cmd.Connection = conn;
            conn.Open();

            cmd.ExecuteReader();

            applicationId = outputApplicationId.Value == DBNull.Value ? 0 : (long)(OracleDecimal)outputApplicationId.Value;
            result = outputResult.Value == DBNull.Value ? "" : (string)(OracleString)outputResult.Value;
            resultCode = outputResultCode.Value == DBNull.Value ? 0 : (long)(OracleDecimal)outputResultCode.Value;

            credAssignment.PrivApplicationId = applicationId;
            credAssignment.Result = result;
            credAssignment.ReturnCode = resultCode;
        }

Answer 1

此代码块是多余的，并且是您收到异常参数数量错误的原因：

cmd.Parameters.Add(new OracleParameter("p_priv_application_id", OracleDbType.Decimal, ParameterDirection.Output));
cmd.Parameters.Add(new OracleParameter("p_result", OracleDbType.Varchar2, ParameterDirection.Output));
cmd.Parameters.Add(new OracleParameter("p_return_code", OracleDbType.Decimal, ParameterDirection.Output));

因为您的输出参数是在它们之后立即添加的：

cmd.Parameters.Add(outputApplicationId);
cmd.Parameters.Add(outputResult);
cmd.Parameters.Add(outputResultCode);

此外，您可以将 outputApplicationId 转换为 OracleDecimal 并使用其 IsNull 属性进行分配，因为目前您将获得 OracleNullValueException尝试访问 null 值时（请参阅 this thread）：

OracleDecimal and OracleString (and some other types like OracleDate, etc.) have an "IsNull" property you can use if you cast the Value property to its runtime type...

if ((OracleDecimal)cmd.Parameters["p1"].Value).IsNull) { …do something… } else { …do something else… }

Or maybe something like this... Decimal p1val = ((OracleDecimal)cmd.Parameters["p1"].Value).IsNull ? 0 : ((OracleDecimal)cmd.Parameters["AVG_SALARY"].Value).Value;

错误的参数数量或类型 - .NET 应用程序中的 Oracle 错误

Wrong number or types of arguments - Oracle Error in .NET application

.net

oracle

arguments