从ms访问ado.net返回多个结果集 [英] return multiple result sets from ms access to ado.net

问题描述

hey们我想从我的ms访问数据库的单个ado.net调用中获取3个表，但是我得到一个错误，当我试图这样做

hey guys i want to fetch 3 tables in 1 single ado.net call from my ms access database, however i get an error when i am trying to do that

当我改变我的sql查询只是fetch 1表，我的代码工作很好

when i change my sql query to just fetch 1 table, my code works fine

任何人都可以让我知道如何实现这个与ms访问？因为我一直在做这个与sql服务器，因为年龄没有任何问题。也许访问不支持多个结果集？我没有工作多与访问。请帮忙。下面是我的代码引用：

can anyone let me know how to achieve this with ms access? because i have been doing this with sql server since ages without any problems. perhaps access does not support multiple result sets? i have not worked much with access. please help. below is my code for reference:

System.Data.OleDb.OleDbConnection con = new System.Data.OleDb.OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=DatabaseFile.mdb;Persist Security Info=True");
System.Data.OleDb.OleDbDataAdapter da = new System.Data.OleDb.OleDbDataAdapter("SELECT * FROM Table1; SELECT * FROM Table2; SELECT * FROM Table3;", con);
DataSet ds = new DataSet();
da.Fill(ds);

更新：家伙这看起来不可能。所以我不得不编写真正愚蠢的代码来得到我想要的，完全浪费计算资源：

UPDATE: guys this does not look possible. so i had to write really stupid code to get what i wanted, complete waste of computing resources:

DataSet ds = new DataSet();

ds.Tables.Add(new DataTable("Table1"));
ds.Tables.Add(new DataTable("Table2"));
ds.Tables.Add(new DataTable("Table3"));

System.Data.OleDb.OleDbConnection con = new System.Data.OleDb.OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=DatabaseFile.mdb;Persist Security Info=True");
System.Data.OleDb.OleDbDataAdapter da = new System.Data.OleDb.OleDbDataAdapter("SELECT * FROM Table1;", con);
da.Fill(ds, "Table1");

da.SelectCommand.CommandText = "SELECT * FROM Table2;";
da.Fill(ds, "Table2");

da.SelectCommand.CommandText = "SELECT * FROM Table3;";
da.Fill(ds, "Table3");

推荐答案

据我所知，在Access mdb中，你不能有多个数据集。如果相反，您使用Access连接到外部数据源，您可以使用传递查询，这样做，但我不认为这是你的情况。 （请参见 http://support.microsoft.com/kb/126992 ）

as far as I know, if your data reside inside the Access mdb, you cannot have multiple data sets. If instead you use Access to connect to an external data source, you could use pass-through queries and do that, but I do not think this is your case. (see http://support.microsoft.com/kb/126992)

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