C# C、 添加记录后更新access数据库

我正在使用C visual studio 2012创建应用程序。问题是，当我将新记录添加到access数据库中时，我的组合框会过期，并且在添加或删除任何记录后，值不会改变。关闭问题并再次打开后，组合框将是最新的。那么如何制作实时组合框呢

try
        {
            connection.Open();

            OleDbCommand command = new OleDbCommand();
            command.Connection = connection;
            string query = "select AccountNumber from Account";
            //MessageBox.Show(query); for checking
            command.CommandText = query;
            //ExecuteNonQuery() : use for update,delete or instert into the database
            OleDbDataReader reader =   command.ExecuteReader();

            while (reader.Read()) //return true
            {
                comboListAcc.Items.Add(reader[0].ToString()); 
            }


            connection.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error : " + ex, "Error Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

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非常感谢

你第一次把数据放进去，为什么你希望盒子会自动更新？更改后，您必须自己更新它，如果其他人更改了数据库，则无法确定是否需要更新它。

您可以为此使用SqlDependency

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显示如何将其绑定到组合框。我编辑帖子并将代码放入其中

using (SqlCommand command=new SqlCommand("select AccountNumber from Account", connection))
{
    // Create a dependency and associate it with the SqlCommand.
    SqlDependency dependency=new SqlDependency(command);

    // Subscribe to the SqlDependency event.
    dependency.OnChange += new OnChangeEventHandler(OnDependencyChange);

    // Execute the command.
    using (SqlDataReader reader = command.ExecuteReader())
    {
        // As you already have for first update
    }
}


void OnDependencyChange(object sender, SqlNotificationEventArgs e )
{
   // Clear and re-add
}