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oracle的存储过程返回记录集，关键之处是要用游标。 关于数据库的游标(cursor)大家肯定都接触不少，我们可以通过OPEN,FETCH,CLOSE操作控制游标进行各种方便的操作，这方面的例子我就不在重复了。我们现在要介绍的是游标变量(cursor variable)。类似游标，游标变量也是指向一个查询结果集的当前行。不同的是，游标变量能为任何类型相似(type-compatible)的查询打开，而并不是绑定到某一个特定的查询。通过游标变量，你可以在数据库的数据提取中获得更多的方便。
首先是建立表:
CREATE TABLE LIHUAN.BILL_POINTS
(
POINTS_ID NUMBER(10,0) NOT NULL,
CUSTOMER_ID NUMBER(10,0) NOT NULL,
BILL_POINT_NO NUMBER(2,0) DEFAULT 1 NOT NULL,
CONSTRAINT PK_BILL_POINTS PRIMARY KEY (POINTS_ID)
)
/
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其次，建PACKAGE
CREATE OR REPLACE PACKAGE LIHUAN.YY_PKG_BILL_POINT_NO/*取得用户的所有计费电序号*/
IS
TYPE T_CURSOR IS REF CURSOR;
PROCEDURE BILL_POINT_NO(P_CUSTOMER_ID BILL_POINTS.CUSTOMER_ID%TYPE,
Re_CURSOR OUT T_CURSOR);
END;
/
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再次，建PACKAGE BODY
CREATE OR REPLACE PACKAGE BODY LIHUAN.YY_PKG_BILL_POINT_NO/*取得用户的所有计费电序号*/
IS
PROCEDURE BILL_POINT_NO(P_CUSTOMER_ID BILL_POINTS.CUSTOMER_ID%TYPE,
Re_CURSOR OUT T_CURSOR)
IS
V_CURSOR T_CURSOR;
BEGIN
OPEN V_CURSOR FOR
select Bill_Point_No from BILL_POINTS where CUSTOMER_ID =P_CUSTOMER_ID;
Re_CURSOR := V_CURSOR;
END;
END;
/
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最后，在.NET中程序调用。
public DataSet Bill_Point_No(string CUSTOMER_ID)//ok
{
DataSet dataset = new DataSet();
Hashtable HT=new Hashtable();
HT.Add("P_CUSTOMER_ID",CUSTOMER_ID);
if(RunProcedure("Re_CURSOR",OracleType.Cursor,ref dataset,
HT,bmsOracleUser+".YY_PKG_BILL_POINT_NO.BILL_POINT_NO",
bmsOracleConnectionString))
{
;
}
else
{
dataset=null;
}
return dataset;
}
public bool RunProcedure(string ReturnParameter,
OracleType ParamType,ref DataSet Dataset,Hashtable HT ,
string ProcedureName,string OracleConnection)
{
System.Data.OracleClient.OracleConnection dsconnection =
new System.Data.OracleClient.OracleConnection(OracleConnection);
System.Data.OracleClient.OracleCommand dacommand =
new System.Data.OracleClient.OracleCommand(ProcedureName,dsconnection);
dsconnection.Open();
dacommand.CommandType=CommandType.StoredProcedure;
IDictionaryEnumerator Enumerator;
Enumerator = HT.GetEnumerator();
object Value=null;
OracleParameter OracleParam;
OracleParam = dacommand.Parameters.
Add(new OracleParameter(ReturnParameter,ParamType));
OracleParam.Direction = ParameterDirection.Output;
while(Enumerator.MoveNext())
{
Value = Enumerator.Value;
OracleParam=dacommand.Parameters.
Add(new OracleParameter
(Enumerator.Key.ToString(), Value));
}
OracleDataAdapter ODAdapter=new OracleDataAdapter(dacommand);
try
{
ODAdapter.Fill(Dataset);
return true;
}
catch(System.Exception e)
{
e.ToString();
return false;
}
finally
{
HT.Clear();
dacommand.Parameters.Clear();
dsconnection.Close();
}
}
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(T115)
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