Question

public List<MuseumDto> GetMuseumsByName(string museum_Name)
{
    var connectionString = ConfigurationManager.
      ConnectionStrings["OracleConnectionString"].ConnectionString;
    var museum = new List<MuseumDto>();
    using (var connection = new OracleConnection(connectionString))
    {
        OracleCommand mycom = new OracleCommand();
        connection.Open();
        mycom.CommandText = "museum_package.get_MuseumByName";
        mycom.Connection = connection;
        mycom.CommandType = CommandType.StoredProcedure;

        mycom.Parameters.Add("v_museum", museum_Name);

        OracleParameter returnParameteraram = mycom.Parameters.Add("ReturnValue", OracleDbType.RefCursor);
        returnParameteraram.Direction = ParameterDirection.ReturnValue;

        OracleDataReader reader = mycom.ExecuteReader();
        try
        {
            while (reader.Read())
            {
                museum.Add(new MuseumDto
                {
                    museumId = reader.GetInt32(0),
                    name = reader.GetString(1),
                    city = reader.GetString(2),
                    about= reader.GetString(3),
                    schedule = reader.GetString(4),
                    noArtefacts= reader.GetInt32(5),

                });
            }
        }
        finally
        {
            // always call Close when done reading.
            reader.Close();
        }
    }
    return museum;
}

这是表格定义：

create table museum
( museumid     number(5) not null
, name         varchar2(30)
, city         varchar2(30)
, about        varchar2(200)
, schedule     varchar2(40)
, noartefacts  number(3) );

这是我的功能：

create or replace package body museum_package as

    function get_MuseumByName
        ( v_museum Museum.Name%type )
        return sys_refcursor
    is
        v_cursor sys_refcursor;
        v_museumName museum.name%type := '%' || v_museum || '%';
    begin
        open v_cursor for
            select museumID, name, city, about, schedule, noArtefacts
            from   museum 
            where  name like v_museumName;

        return v_cursor;
    end;

end museum_package;

我收到例外：

ORA-06550：第1行第15栏：
  PLS-00306：调用＆＃39; GET_MUSEUMBYNAME＆＃39;中的参数数量或类型错误   ORA-06550：第1行第7栏：
  PL / SQL：忽略语句

Answer 1

我无法评论其他人的帖子，因为我没有足够的声誉（我在这里很新）。您的问题可能是因为.NET无法将Oracle中列的类型与您在读取列时指定的列进行映射。

您能否告诉我们博物馆桌子栏目的数据类型？

Answer 2

必须将返回值添加为第一个参数。

 OracleParameter returnParameteraram = mycom.Parameters.Add("ReturnValue", OracleDbType.RefCursor);
 returnParameteraram.Direction = ParameterDirection.ReturnValue;
mycom.Parameters.Add("v_museum", museum_Name);

C＃pl / sql包函数

2 个答案: