使用以SQLReader的从存储过程返回多个表 [英] Use SqlReader to get back multiple tables from a stored procedure
问题描述
我有一个用户定义的类型,这是在SQLServer数据库的DataTable。我一直在使用数据库的DbCommand等,以调用存储过程并获得数据集回来。 。数据集是很方便的,因为它们可以包含多个表
现在我想通过在一个DataTable,所以我尝试:
字符串_strComText =stored_procedure_name_changed_to_protect_the_innocent;
_objCom = _objDB.GetSqlStringCommand(_strComText);
_objDB.AddInParameter(_objCom,@BASE_ITEMIDS,DbType.Object,dtItemIds);
_objCom.CommandType = CommandType.StoredProcedure;
=数据_objDB.ExecuteDataSet(_objCom);
不过,我得到一个异常的@BASE_ITEMIDS是不是正确的类型:
传入的表格格式数据流(TDS)远程过程调用(RPC)协议流不正确的参数1(\@ BASE_ITEMIDS\):数据类型0X62(SQL_VARIANT)有一个无效的类型为特定类型的元数据
我已经看到了这个用做SQLReader的,但也可以SQLReader的使用取回多个表?如果我的第一个表是空的,我没有看到任何SQLReader的行。
能SQLReader的用于取回多个表?
块引用>
是的。你必须按顺序阅读每个表和调用表之间的
.NextResult()
方法。使用(VAR RDR = MySqlCommand.ExecuteReader())
{
做
{
,而(rdr.Read())
$ { b $ b //做到与每个记录
的东西}
},而(rdr.NextResult());
}
I have a user defined type, which is a datatable in an SqlServer database. I have been using Database, DbCommand, etc to call stored procedures and get a Dataset back. Datasets are handy in that they can contain multiple tables.
Now I want to pass a Datatable in, so I tried:
string _strComText = "stored_procedure_name_changed_to_protect_the_innocent"; _objCom = _objDB.GetSqlStringCommand(_strComText); _objDB.AddInParameter(_objCom, "@BASE_ITEMIDS", DbType.Object, dtItemIds); _objCom.CommandType = CommandType.StoredProcedure; dataset = _objDB.ExecuteDataSet(_objCom);
But I get an exception that "@BASE_ITEMIDS" is not the correct type: "The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Parameter 1 (\"@BASE_ITEMIDS\"): Data type 0x62 (sql_variant) has an invalid type for type-specific metadata."
I've seen this done with SqlReader, but can sqlReader be used to get back multiple tables? If my first table is empty, I don't see any rows in SqlReader.
解决方案can sqlReader be used to get back multiple tables?
Yes. You have to read each table in sequence and call the
.NextResult()
method between tables.using (var rdr = MySqlCommand.ExecuteReader()) { do { while (rdr.Read()) { //do something with each record } } while(rdr.NextResult()); }
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