将oracle的sys_refcursor返回到c#
C#:将oracle的sys_refcursor返回到c#,c#,oracle,stored-procedures,oracle11g,C#,Oracle,Stored Procedures,Oracle11g,C#: public DataSet ListaClientes() { DataSet ds = new DataSet(); try { System.Data.OracleClient.OracleConnection conexion = Conexion.GetConnection(); if (conexion.State == System.Data.ConnectionSta
public DataSet ListaClientes()
{
DataSet ds = new DataSet();
try
{
System.Data.OracleClient.OracleConnection conexion = Conexion.GetConnection();
if (conexion.State == System.Data.ConnectionState.Open)
{
System.Data.OracleClient.OracleCommand cmd = new System.Data.OracleClient.OracleCommand();
cmd.Connection = conexion;
cmd.CommandText = "ListadoClientes";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("resul", OracleDbType.RefCursor).Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
conexion.Close();
System.Data.OracleClient.OracleDataAdapter da = new System.Data.OracleClient.OracleDataAdapter(cmd);
da.Fill(ds);
}
return ds;
}
catch(Exception e)
{
throw e;
}
}
CREATE OR REPLACE PROCEDURE ListadoClientes(resul OUT sys_refcursor)
IS
BEGIN
OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO
from cliente;
END ListadoClientes;
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'LISTADOCLIENTES'
ORA-06550: line 1, column 7: PL/SQL: Statement ignored
Oracle存储过程:
public DataSet ListaClientes()
{
DataSet ds = new DataSet();
try
{
System.Data.OracleClient.OracleConnection conexion = Conexion.GetConnection();
if (conexion.State == System.Data.ConnectionState.Open)
{
System.Data.OracleClient.OracleCommand cmd = new System.Data.OracleClient.OracleCommand();
cmd.Connection = conexion;
cmd.CommandText = "ListadoClientes";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("resul", OracleDbType.RefCursor).Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
conexion.Close();
System.Data.OracleClient.OracleDataAdapter da = new System.Data.OracleClient.OracleDataAdapter(cmd);
da.Fill(ds);
}
return ds;
}
catch(Exception e)
{
throw e;
}
}
CREATE OR REPLACE PROCEDURE ListadoClientes(resul OUT sys_refcursor)
IS
BEGIN
OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO
from cliente;
END ListadoClientes;
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'LISTADOCLIENTES'
ORA-06550: line 1, column 7: PL/SQL: Statement ignored
从C#CATCH块可见的错误:
public DataSet ListaClientes()
{
DataSet ds = new DataSet();
try
{
System.Data.OracleClient.OracleConnection conexion = Conexion.GetConnection();
if (conexion.State == System.Data.ConnectionState.Open)
{
System.Data.OracleClient.OracleCommand cmd = new System.Data.OracleClient.OracleCommand();
cmd.Connection = conexion;
cmd.CommandText = "ListadoClientes";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("resul", OracleDbType.RefCursor).Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
conexion.Close();
System.Data.OracleClient.OracleDataAdapter da = new System.Data.OracleClient.OracleDataAdapter(cmd);
da.Fill(ds);
}
return ds;
}
catch(Exception e)
{
throw e;
}
}
CREATE OR REPLACE PROCEDURE ListadoClientes(resul OUT sys_refcursor)
IS
BEGIN
OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO
from cliente;
END ListadoClientes;
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'LISTADOCLIENTES'
ORA-06550: line 1, column 7: PL/SQL: Statement ignored
是否有理由不使用函数而不是过程
CREATE OR REPLACE FUNCTION ListadoClientes() RETURN sys_refcursor
IS
resul Sys_refcursor;
BEGIN
OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO
from cliente;
RETURN resul;
END ListadoClientes;
然后在C#中,必须将其更改为:
cmd.Parameters.Add("resul", OracleDbType.RefCursor, ParameterDirection.ReturnValue);
当您运行da.Fill(ds)时
然后执行该函数,即使用cmd.ExecuteNonQuery()代码>执行函数两次
无论如何,对于一个程序来说,正确的方法应该是:
cmd.CommandText = "ListadoClientes(:resul)";
是否有理由不使用函数而不是过程
CREATE OR REPLACE FUNCTION ListadoClientes() RETURN sys_refcursor
IS
resul Sys_refcursor;
BEGIN
OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO
from cliente;
RETURN resul;
END ListadoClientes;
然后在C#中,必须将其更改为:
cmd.Parameters.Add("resul", OracleDbType.RefCursor, ParameterDirection.ReturnValue);
当您运行da.Fill(ds)时
然后执行该函数,即使用cmd.ExecuteNonQuery()代码>执行函数两次
无论如何,对于一个程序来说,正确的方法应该是:
cmd.CommandText = "ListadoClientes(:resul)";
最后,我设法让它以这种方式工作:
存储过程
create or replace PROCEDURE ListadoClientes(resul OUT sys_refcursor) IS BEGIN OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO from cliente; END ListadoClientes;
源代码c#
最后,我设法让它以这种方式工作:
存储过程
create or replace PROCEDURE ListadoClientes(resul OUT sys_refcursor) IS BEGIN OPEN resul for select ID ,NOMBRES ,APELLIDOS ,CEDULA ,DIRECCION ,TELEFONO from cliente; END ListadoClientes;
源代码c#