SqlConnection connection = new SqlConnection(connectionString);connection.Open();// Do something with the connection...connection.Close();} 在上面的代码中，我们创建了一个SqlConnection对象，并使用Open方法打开了与数据库的连接。接着，我们可以执行SQL查询语句或其他操作，并在最后使用Close方法关闭连接。对于...
sqlConnection.Close(); } //方法三 publicvoidUseSqlDataSet() { SqlConnection sqlConnection=newSqlConnection(sqlConnectionCommand); SqlCommand sqlCommand=newSqlCommand(); sqlCommand.CommandType=System.Data.CommandType.Text; sqlCommand.Connection=sqlConnection; sqlCommand.CommandText=sqlSelectCommand; sqlConnection...
private void ExecuteSql(string conn, string DatabaseName, stringSql) { System.Data.SqlClient.SqlConnection mySqlConnection = new System.Data.SqlClient.SqlConnection(conn); System.Data.SqlClient.SqlCommand Command = new System.Data.SqlClient.SqlCommand(Sql, mySqlConnection); Command.Connection.Open(...
database/sql在创建时将简单易用纳入考量,配置为支持与类 SQL 数据库交互所需的最基本必要功能。 为了与数据库管理系统交互,数据库软件包需要适当的驱动程序。 目前,database/sql 支持超过 50 种数据库驱动程序,涵盖SQLite、MySQL/MariaDB、PostgreSQL、Oracle 和 MS SQL Server 等最流行的 DBMS。 此软件包还支持...
服务器。...user,std::string pwd,std::string db_name) { // 函数mysql_real_connect建立一个数据库连接 // 成功返回MYSQL*连接句柄,...失败返回NULL connection = mysql_real_connect(connection,host.c_str(),user.c_str(),pwd.c_str(),db_name.c_str...if(mysql_query(connection,sql.c_str(...
{ pwszConnStr = L""; } // Connect to the driver. Use the connection string if supplied // on the input, otherwise let the driver manager prompt for input. TRYODBC(hDbc, SQL_HANDLE_DBC, SQLDriverConnect(hDbc, GetDesktopWindow(), pwszConnStr, SQL_NTS, NULL, 0, NULL, SQL_DRIVER...
连接对象(Connection) Connection对象建立一个对象数据源的数据交换环境,ADOCE允许建立对ACCESS数据源和SQLCE数据源的连接。 记录集对象(Recordset) Recordset对象是ADOCE数据操作的核心,它是查询结果的集合,可以通过这个结果集处理来自数据源的数据,包括修改记录、更新记录、插入和删除记录等。可以通过Recordset的Open方法执行...
(new ConnectionConfig() { ConnectionString = DBConnectionString, DbType = getdbType(), IsAutoCloseConnection = true, InitKeyType = InitKeyType.Attribute, AopEvents= new AopEvents { OnLogExecuting = (sql, paramster) => { //string sa = sql; Debug.Print(sql + $"\r\n" + $"{db....
GetDefaultConnect Called to get the default connection string. GetDefaultSQL Called to get the default SQL string to execute. OnSetOptions Called to set options (used on selection) for the specified ODBC statement. OnSetUpdateOptions Called to set options (used on update) for the specified ODBC...
Ngoài ra, các chức năng sau đây được thêm vào SqlClient để cung cấp cách truy xuất ID kết nối ở phía máy khách nếu ID kết nối sẵn dùng: Thuộc tính ConnectionId...