C++ 怎么实现ADO连接SQLite
时间: 2024-05-07 19:17:30 浏览: 146
C++中用ODBC和ADO方式连接SQL数据库
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在 C 语言中实现 ADO 连接 SQLite 的步骤如下:
1. 引入相关头文件
```
#include <windows.h>
#include <winerror.h>
#include <ole2.h>
#include <activscp.h>
```
2. 创建 ADO 连接对象
```
_ConnectionPtr pConn;
pConn.CreateInstance(__uuidof(Connection));
```
3. 设置连接属性
```
pConn->ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\example.mdb;";
```
4. 打开连接
```
pConn->Open("", "", "", adModeUnknown);
```
5. 创建 ADO 命令对象
```
_CommandPtr pCommand;
pCommand.CreateInstance(__uuidof(Command));
```
6. 绑定 SQL 语句并执行
```
pCommand->ActiveConnection = pConn;
pCommand->CommandText = "SELECT * FROM exampletable;";
_RecordsetPtr pRecordset;
pRecordset = pCommand->Execute(NULL, NULL, adCmdText);
```
完整代码示例:
```
#include <windows.h>
#include <winerror.h>
#include <ole2.h>
#include <activscp.h>
void ConnectToDB();
int main()
{
ConnectToDB();
return 0;
}
void ConnectToDB()
{
CoInitialize(NULL);
_ConnectionPtr pConn;
pConn.CreateInstance(__uuidof(Connection));
pConn->ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\example.mdb;";
pConn->Open("", "", "", adModeUnknown);
_CommandPtr pCommand;
pCommand.CreateInstance(__uuidof(Command));
pCommand->ActiveConnection = pConn;
pCommand->CommandText = "SELECT * FROM exampletable;";
_RecordsetPtr pRecordset;
pRecordset = pCommand->Execute(NULL, NULL, adCmdText);
CoUninitialize();
}
```
以上代码仅提供参考,具体实现还需根据实际情况进行调整和完善。
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