VC连接SQL数据库并实现各种功能资源-CSDN文库

共51个文件

h：7个

sbr：6个

cpp：6个

5星 · 超过95%的资源需积分: 9 11 浏览量 2011-09-23 10:24:23 上传评论 1 收藏 4.57MB RAR 举报

在VC++环境中，连接SQL Server数据库并实现各种操作是软件开发中的常见任务。这涉及到数据库API的使用，如ODBC（Open Database Connectivity）或OLE DB，以及SQL语言的知识。下面我们将详细探讨如何在VC++中连接SQL Server数据库，并实现读取、插入、更新、删除、查找和排序等基本功能。为了连接到SQL Server数据库，我们需要包含必要的库文件，如`#include <sql.h>`，`#include <sqlext.h>`（对于ODBC）或者`#import "msado15.dll" no_namespace rename("EOF", "adEOF")`（对于ADO）。然后，我们需要设置DSN（数据源名称）、用户名和密码，创建数据库连接。 1. **连接数据库**：使用`SQLConnect`函数（ODBC）或`_ConnectionPtr`对象（ADO）建立连接。例如，ODBC的代码可能如下： ```cpp SQLHENV hEnv; SQLHDBC hdbc; SQLRETURN retCode; SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &hEnv); SQLSetEnvAttr(hEnv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0); SQLAllocHandle(SQL_HANDLE_DBC, hEnv, &hdbc); SQLConnect(hdbc, (SQLCHAR*)"DSN_NAME", SQL_NTS, (SQLCHAR*)"USER", SQL_NTS, (SQLCHAR*)"PASSWORD", SQL_NTS); ``` ADO的代码则如下： ```cpp _ConnectionPtr conn; conn.CreateInstance(__uuidof(Connection)); conn->Open("DSN=DSN_NAME;UID=USER;PWD=PASSWORD;", "", "", adConnectUnspecified); ``` 2. **查询数据**：使用`SQLExecDirect`（ODBC）或`Execute`（ADO）发送SQL查询。例如，读取数据： ```cpp SQLHSTMT hStmt; SQLExecDirect(hdbc, (SQLCHAR*)"SELECT * FROM TableName", SQL_NTS); // Process result set... ``` ADO： ```cpp _RecordsetPtr rs; rs.CreateInstance(__uuidof(Recordset)); rs->Open("SELECT * FROM TableName", conn, adOpenStatic, adLockOptimistic, adCmdText); // Process recordset... ``` 3. **插入数据**：插入新记录使用`INSERT INTO`语句。例如： ```cpp SQLExecDirect(hdbc, (SQLCHAR*)"INSERT INTO TableName (Column1, Column2) VALUES ('Value1', 'Value2')", SQL_NTS); ``` ADO： ```cpp rs->AddNew(); rs("Column1") = "Value1"; rs("Column2") = "Value2"; rs->Update(); ``` 4. **更新数据**：更新现有记录使用`UPDATE`语句。例如： ```cpp SQLExecDirect(hdbc, (SQLCHAR*)"UPDATE TableName SET Column1='NewValue1' WHERE Column2='Value2'", SQL_NTS); ``` ADO： ```cpp rs->Filter = "Column2 = 'Value2'"; rs->MoveFirst(); rs("Column1") = "NewValue1"; rs->Update(); ``` 5. **删除数据**：删除记录使用`DELETE FROM`语句。例如： ```cpp SQLExecDirect(hdbc, (SQLCHAR*)"DELETE FROM TableName WHERE Column2='Value2'", SQL_NTS); ``` ADO： ```cpp rs->Filter = "Column2 = 'Value2'"; rs->Delete(); ``` 6. **查找数据**：可通过`WHERE`子句实现特定条件的查询。例如，模糊查询： ```cpp SQLExecDirect(hdbc, (SQLCHAR*)"SELECT * FROM TableName WHERE Column1 LIKE '%Pattern%'", SQL_NTS); ``` ADO： ```cpp rs->Open("SELECT * FROM TableName WHERE Column1 LIKE '%Pattern%'", conn, adOpenStatic, adLockOptimistic, adCmdText); ``` 7. **数据排序**：在查询中使用`ORDER BY`子句对结果进行排序。例如： ```cpp SQLExecDirect(hdbc, (SQLCHAR*)"SELECT * FROM TableName ORDER BY Column1 ASC", SQL_NTS); ``` ADO： ```cpp rs->Open("SELECT * FROM TableName ORDER BY Column1 ASC", conn, adOpenStatic, adLockOptimistic, adCmdText); ``` 以上就是在VC++中利用ODBC或ADO连接SQL Server数据库，并实现基本数据操作的步骤。需要注意的是，实际应用中还要考虑错误处理、事务管理、游标操作、批处理等更复杂的场景。同时，为了提高性能和安全性，应尽量优化SQL语句，避免SQL注入等安全问题。

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SQLServer.rar （51个子文件）

SQLServer

SQLServer.ncb 385KB

resource.h 1KB

SQLServer.dsw 543B

~$ Microsoft Word 文档.doc 162B

SortHeaderCtrl.cpp 5KB

Debug

SQLServer.obj 18KB

vc60.pdb 548KB

SQLServerDlg.sbr 0B

SQLServer.pdb 625KB

SQLServer.exe 152KB

SQLServer.res 3KB

SQLServer.ilk 376KB

vc60.idb 241KB

StdAfx.obj 131KB

InsertDlg.sbr 0B

SortHeaderCtrl.obj 19KB

SQLServer.sbr 0B

SQLServerDlg.obj 123KB

msado15.tli 75KB

SortListCtrl.obj 47KB

SQLServer.pch 9.25MB

StdAfx.sbr 1.69MB

SQLServer.bsc 4.12MB

msado15.tlh 89KB

SortListCtrl.sbr 0B

InsertDlg.obj 14KB

SortHeaderCtrl.sbr 0B

SQLServer.opt 55KB

SortListCtrl.h 2KB

SQLServer.h 1KB

SQLServer.aps 37KB

InsertDlg.cpp 1KB

学生信息_Data.MDF 1024KB

SQLServerDlg.cpp 13KB

ReadMe.txt 4KB

res

SQLServer.ico 1KB

SQLServer.rc2 401B

SQLServer.plg 1KB

SortListCtrl.cpp 9KB

SQLServerDlg.h 2KB

msado15.tli 75KB

SQLServer.cpp 2KB

SortHeaderCtrl.h 1024B

StdAfx.cpp 211B

InsertDlg.h 1KB

SQLServer.rc 7KB

msado15.tlh 88KB

学生信息_Log.LDF 1024KB

StdAfx.h 1KB

SQLServer.dsp 5KB

SQLServer.clw 2KB

======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : SQLServer ======================================================================== AppWizard has created this SQLServer application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your SQLServer application. SQLServer.dsp This file (the project file) contains information at the project level and is used to build a single project or subproject. Other users can share the project (.dsp) file, but they should export the makefiles locally. SQLServer.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CSQLServerApp application class. SQLServer.cpp This is the main application source file that contains the application class CSQLServerApp. SQLServer.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. SQLServer.clw This file contains information used by ClassWizard to edit existing classes or add new classes. ClassWizard also uses this file to store information needed to create and edit message maps and dialog data maps and to create prototype member functions. res\SQLServer.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file SQLServer.rc. res\SQLServer.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// AppWizard creates one dialog class: SQLServerDlg.h, SQLServerDlg.cpp - the dialog These files contain your CSQLServerDlg class. This class defines the behavior of your application's main dialog. The dialog's template is in SQLServer.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named SQLServer.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, and your application is in a language other than the operating system's current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don't do this, some of the UI elements of your application will remain in the language of the operating system. /////////////////////////////////////////////////////////////////////////////

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