VB.net 调用oracle里面的procedure的两种方法

概述 存储过程的实例: PROCEDURE TEST_C(temp out varchar2,a IN varchar2, b in varchar2) IS BEGIN   temp:=a || b;  END; 调用方法1: 说明:要在程序开头加入Imports System.Data.OleDb         Dim dbConn As New OleDbConnection         存储过程的实例:
PROCEDURE TEST_C(temp out varchar2,a INvarchar2,b in varchar2)
IS
BEGIN
temp:=a || b;
END;

调用方法1:
说明:要在程序开头加入imports System.Data.oleDb

Dim dbConn As New oleDbConnection
Dim dbComm As oleDbCommand

dbConn.ConnectionString = "ProvIDer=MSDAORA.1;User ID=xxx;Password=xxx;Data Source=xxx;"
dbConn.open()
dbComm = dbConn.CreateCommand

dbComm.Parameters.Add("temp",oleDbType.VarChar,30).Direction = ParameterDirection.Output
dbComm.Parameters.Add("a",30).Direction = ParameterDirection.input
dbComm.Parameters("a").Value = "test "
dbComm.Parameters.Add("b",30).Direction = ParameterDirection.input
dbComm.Parameters("b").Value = "OK"

dbComm.CommandText = "{CALL TEST_C(?,?,?)}" '这里就是使用"？"来代替参数
dbComm.CommandType = CommandType.Text
dbComm.ExecuteNonquery()
dbConn.Close()

MessageBox.Show(dbComm.Parameters("temp").Value)

调用方法2:
说明:要在程序开头加入imports System.Data.OracleClIEnt

Dim oraConn As New OracleConnection
Dim oraComm As New OracleCommand

oraConn.ConnectionString = "Data Source=xxx;User ID=xxx;Password=xxx"
oraComm.Connection = oraConn

oraComm.Parameters.Add("temp",OracleType.VarChar,10).Direction = ParameterDirection.Output
oraComm.Parameters.Add("a",10).Direction = ParameterDirection.input
oraComm.Parameters("a").Value = "test "
oraComm.Parameters.Add("b",10).Direction = ParameterDirection.input
oraComm.Parameters("b").Value = "OK"

oraConn.open()
oraComm.CommandText = "TEST_C"
oraComm.CommandType = CommandType.StoredProcedure
oraComm.ExecuteNonquery()
oraConn.Close()

MessageBox.Show(oraComm.Parameters("temp").Value)

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