C#中使用Oracle 存储过程笔记

2/9/2008来源:Oracle教程人气:6837


  1.     调用包含out/ in out类型参数的存储过程
  
  存储过程:
  
  CREATE OR REPLACE PROCEDURE "SITE_EDITSITEDATAEXIST"
  
  (id_ number,
  
  name_ varchar2,
  
  httpRoot_ varchar2,
  
  flag out integer )//out 只具备输出功能 in out 为输入/输出型
  
  as
  
  tempNum integer;
  
  begin
  
  flag:=0;
  
  select count(id) into tempNum from WebSite_Info where Name = name_ and ID<>id_;
  
  if tempNum > 0 then
  
  flag:=3;
  
  end if;
  
  select count(id) into tempNum from WebSite_Info where HttpRoot = HttpRoot_ and ID<>id_;
  
  if tempNum > 0 then
  
  flag:=4;
  
  end if;
  
  commit;
  
  end ;
  
  /
  
  调用方法:
  
  OracleParameter retPar = new OracleParameter(“channelId”, OracleType.Number);
  
  retPar.Direction = ParameterDirection.Output;//此处和存储过程中的类型匹配
  
  //假如为in out 类型 此处应声//明InputOutput
  
  OracleParameter[] param = new OracleParameter[ 2 ]
  
  {
  
  new OracleParameter(“subjectId”, OracleType.VarChar, 60)
  
  };
  
  param[ 0 ].Value = 0;
  
  OracleHelper.ExecuteReader( OracleHelper.CONN_STRING_BASE, CommandType.StoredProcedure,
  
  "site_EditSiteDataExist" ,param);
  
  //有返回值时必须使用ExecuteReader方法
  
  object val = param[ 3 ].Value;
  
  return int.Parse( val.ToString() );
  
  2.     存储过程返回记录集
  
  存储过程必须写在包中,再调用.
  
  包的写法:
  
  CREATE OR REPLACE PACKAGE pkg_cms
  
  AS
  
  TYPE myrctype IS REF CURSOR;
  
  PROCEDURE site_GetSiteData(Id_ number, p_rc OUT myrctype);
  
  END pkg_cms;
  
  /
  
  CREATE OR REPLACE PACKAGE BODY pkg_cms
  
  AS
  
  PROCEDURE site_GetSiteData(Id_ number,p_rc OUT myrctype)
  
  IS
  
  BEGIN
  
  OPEN p_rc FOR
  
  Select Id, Name, Url, Folder_Name, Desccms, Char_Name,
  
  DB_Address, DB_User, DB_PassWord, DB_Name, DB_ConnString, HttpRoot
  
  From WebSite_Inf
  
  WHERE id=Id_;
  
  END site_GetSiteData;
  
  END pkg_cms;
  
  /
  
  调用:
  
  OracleParameter[] param = new OracleParameter[ 2 ]
  
  {
  
  new OracleParameter(PARM_ID_, OracleType.Number, 8),
  
  new OracleParameter("p_rc", OracleType.Cursor, 2000, ParameterDirection.Output, true, 0, 0, "",DataRowVersion.Default, Convert.DBNull)//此处为包体中声明的游标类型
  
  };

  
  param[ 0 ].Value = siteID;
  
  return OracleHelper.ExecuteReader(OracleHelper.CONN_STRING_BASE, CommandType.StoredProcedure,"pkg_cms.site_GetSiteData", param);
  
  //调用时候先写包名
  
  3.     Oracle存储过程中其它的方法
  
  字符串操作
  
  INSTR(STR,Maker)//取字符串中字符的位置
  
  SUBStr(str,beginnum,len)//取子串
  
  To_char()//将数字转到字符串
  
   //拼串  相当于+ 号
  
  LENGTH(Oldword) //取字符串长度
  
  时间类
  
  to_date('dateStr','YYYY-Mi-DD')//字符串转成date型”’YYYY-MM-DD’”
  
  Date1-date2=天数