win-service-machine-dll/UppPay/Forms/SMForm.cs

using Newtonsoft.Json.Linq;
using System;
using System.Windows.Forms;

namespace UppPay.Forms
{
    public partial class SMForm : Form
    {
        public JObject OutjObject { get; set; }
        public string authcode { get; set; }
        private bool isButtonClose = false;
        public SMForm()
        {
            InitializeComponent();
            OutjObject = new JObject();
            authcode = "";
            // 设置窗体在屏幕上居中显示
            this.StartPosition = FormStartPosition.CenterScreen;
            // 设置窗体始终显示在其他窗口的最前面
            this.TopMost = true;
            authcodeBox.Focus();
            // 为 TextBox 的 KeyDown 事件添加处理程序
            authcodeBox.KeyDown += authcodeBox_KeyDown;
            // 处理窗体关闭事件，阻止关闭操作
            this.FormClosing += MainForm_FormClosing;
            authcodeBox.Focus();
        }
        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!isButtonClose)
            {
                OutjObject = new JObject();
                OutjObject["errorCode"] = "-1";
                OutjObject["errorMessage"] = "收费员已取消操作";
                //this.DialogResult = DialogResult.OK;
                //this.Close();
            }
        }
        private void authcodeBox_KeyDown(object sender, KeyEventArgs e)
        {
            // 检查是否按下回车键
            if (e.KeyCode == Keys.Enter)
            {
                // 处理回车键按下事件
                SMPayLoading(authcodeBox.Text);
                // 阻止回车键的默认行为，避免在多行文本框中换行
                e.SuppressKeyPress = true;
            }
        }
        private async void SMPayLoading(string authcode)
        {
            try
            {
                if (string.IsNullOrWhiteSpace(authcode))
                {
                    Tlabel.Text = "请输入支付码内容....";
                    authcodeBox.Focus();
                }
                else
                {
                    OutjObject = new JObject();
                    OutjObject["errorCode"] = "0";
                    OutjObject["errorMessage"] = "扫码成功";
                    OutjObject["authcode"] = authcode;
                    isButtonClose = true;
                    this.DialogResult = DialogResult.OK;
                    this.Close();
                }
                
            }
            catch (Exception ex)
            {
                // 处理异常
                Tlabel.Text = $"发生错误: {ex.Message}";
            }
        }
    }
}