sql
怎吗在VC中用MFC中的ODBC数据库类（CDatabase,CRecordset)备份数据库，怎吗调用存储过程，有例子吗，发一个过来，多谢！信箱zhangchenbo1981@tom.com 问题点数：0、回复次数：4Top
1 楼txlicenhe（马可）回复于 2003-12-04 17:58:19 得分 0
去MFC版找贴子吧。Top
2 楼pengdali（）回复于 2003-12-04 18:26:09 得分 0
below is from MSDN,you can find a lot of technical article in MSDN if you search"stored procedure and VC"
good luck
Steps To Reproduce Behavior
In the SQL Server 7.0 Query Analyzer select the test database Pubs.
Create the following stored procedure. This stored procedure returns a recordset and an out parameter count.
if exists (select * from sysobjects where id = object_id(N'[dbo].[GetJobs]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop proc GetJobs
go
create proc GetJobs @id as int, @count as int [out] as
begin
Select @count = Count(*) from jobs where job_id >@id
Select * from jobs where job_id >@id
end
go
Use VC App Wizard to create a new console application and modify the code as follows:
#include "stdafx.h"
#include "stdio.h"
#import "C:\PROGRA~1\COMMON~1\System\ado\msado15.dll" no_namespace rename ("EOF", "EOF2")
struct InitOle {
InitOle() { ::CoInitialize(NULL); }
~InitOle() { ::CoUninitialize(); }
} _init_InitOle_;
int main(int argc, char* argv[])
{
_variant_t varErr((long)0, VT_ERROR);
_CommandPtr comm(__uuidof(Command));
_ConnectionPtr conn(__uuidof(Connection));
_bstr_t connstr="Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=pubs;Data Source=(local)";
conn->Open(connstr, "", "", adConnectUnspecified);
comm->ActiveConnection=conn;
comm->CommandText="GetJobs";
comm->CommandType = adCmdStoredProc ;
comm->Parameters->Refresh();
_variant_t recs;
comm->Parameters->Item[_variant_t((short)1)]->Value= _variant_t((long)5);
_RecordsetPtr rs = comm->Execute(&recs, &vtMissing,adCmdStoredProc);
_variant_t recordcount= comm->Parameters->Item[_variant_t((short)2)]->Value;
printf("recordcount = %li\n", (long)recordcount);
return 0;
}
Change the Datasource, User ID and password in the connection string above.
The recordcount variant that the above code returns is of type VT_NULL rather than the number of records that the stored procedure returns.
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3 楼pengdali（）回复于 2003-12-04 18:26:43 得分 0
--备份
backup database sys to disk='c:\目录\a.bak' with init
--还原
USE master
restore database 数据名 from disk='c:\test.bak' with REPLACETop
4 楼zhangchenbo（zhangchenbo）回复于 2003-12-06 18:16:01 得分 0
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