C语言 实时刷新 数据库
C如何实现实时刷新数据库?
在C#中,实时刷新数据库通常涉及使用定时器或后台线程来定期查询数据库并更新UI。以下是一个简化的示例代码:,,“csharp,using System;,using System.Data.SqlClient;,using System.Threading;,using System.Windows.Forms;,,public class DatabaseRefresher,{, private Timer timer;, private string connectionString = “your_connection_string”;,, public DatabaseRefresher(), {, timer = new Timer(UpdateDatabase, null, 0, 5000); // 每5秒刷新一次, },, private void UpdateDatabase(object state), {, using (SqlConnection connection = new SqlConnection(connectionString)), {, connection.Open();, SqlCommand command = new SqlCommand(“SELECT * FROM YourTable”, connection);, SqlDataReader reader = command.ExecuteReader();,, // 处理数据, while (reader.Read()), {, Console.WriteLine(reader[“YourColumn”].ToString());, },, reader.Close();, }, },},`,,这个示例展示了如何使用System.Threading.Timer`类每5秒执行一次数据库查询,并在控制台输出结果。请根据实际需求调整连接字符串和SQL查询。