if (e.KeyCode == Keys.Enter) { // 判断条码是否为设置的良品或不良品条码 string barcode = txt_barcode.Text.Trim(); string connectionString = @"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = db.accdb;Jet OLEDB:Database Password = @maruhi"; using (OleDbConnection connection = new OleDbConnection(connectionString)) { connection.Open(); OleDbCommand command = new OleDbCommand("SELECT COUNT(*) FROM ICT_test WHERE Date=@date AND Barcode=@barcode AND Result='OK'", connection); command.Parameters.AddWithValue("@date", DateTime.Now.ToString("yyyy-MM-dd")); command.Parameters.AddWithValue("@barcode", barcode); int count = (int)command.ExecuteScalar(); if (count == 0) { // 条码错误 lb_test_state.BackColor = Color.Red; lb_test_state.Text = "条码错误 "; { // 良品或不良品点检 if (goodBarcodeList.Contains(barcode)) { lb_test_state.BackColor = Color.Yellow; lb_test_state.Text = "请进行良品点检"; SendBarcode(); } else if (badBarcodeList.Contains(barcode)) { lb_test_state.BackColor = Color.Yellow; lb_test_state.Text = "请进行不良品点检"; SendBarcode(); } } } }在此基础上修改，当良品和不良品测试结束后，条码不再受约束，无论输入什么条码，label状态栏始终是黄色，并提示，“已点检，请进行ICT测试”，并且所有条码都可以发送到ICT测试软件

根据您的描述，您需要在良品和不良品测试结束后，解除对条码的限制，使得无论输入什么条码，都可以发送到ICT测试软件并提示“已点检，请进行ICT测试”，而且label状态栏始终是黄色。那么您可以参考下面的代码进行修改：

if (e.KeyCode == Keys.Enter) 
{ 
    // 判断条码是否为设置的良品或不良品条码 
    string barcode = txt_barcode.Text.Trim(); 
    string connectionString = @"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = db.accdb;Jet OLEDB:Database Password = @maruhi"; 
    using (OleDbConnection connection = new OleDbConnection(connectionString)) 
    { 
        connection.Open(); 
        OleDbCommand command = new OleDbCommand("SELECT COUNT(*) FROM ICT_test WHERE Date=@date AND Barcode=@barcode AND Result='OK'", connection); 
        command.Parameters.AddWithValue("@date", DateTime.Now.ToString("yyyy-MM-dd")); 
        command.Parameters.AddWithValue("@barcode", barcode); 
        int count = (int)command.ExecuteScalar(); 
        if (count == 0) 
        { 
            // 条码错误 
            lb_test_state.BackColor = Color.Red; 
            lb_test_state.Text = "条码错误 "; 
            // 良品或不良品点检 
            if (goodBarcodeList.Contains(barcode)) 
            { 
                lb_test_state.BackColor = Color.Yellow; 
                lb_test_state.Text = "请进行良品点检"; 
                SendBarcode(); 
            } 
            else if (badBarcodeList.Contains(barcode)) 
            { 
                lb_test_state.BackColor = Color.Yellow; 
                lb_test_state.Text = "请进行不良品点检"; 
                SendBarcode(); 
            } 
            else 
            { 
                lb_test_state.BackColor = Color.Yellow; 
                lb_test_state.Text = "已点检，请进行ICT测试"; 
                SendBarcode(); 
            } 
        } 
        else 
        { 
            lb_test_state.BackColor = Color.Green; 
            lb_test_state.Text = "测试通过"; 
            SendBarcode(); 
        } 
    } 
}

在代码中，我们加入了一个`else`语句，当条码不是良品和不良品条码时，就会执行这个`else`语句，将label状态栏设为黄色，并提示“已点检，请进行ICT测试”，然后将条码发送到ICT测试软件。这样，无论输入什么条码，都可以发送到ICT测试软件并提示“已点检，请进行ICT测试”，而且label状态栏始终是黄色。