C#中使用Oracle 存储过程笔记

答案：C#中使用Oracle 存储过程笔记

 

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

//如果为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_Info

            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

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