PEIS/Update/CountdownMessageBox.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Update
{
    public partial class CountdownMessageBox : Form
    {
        private int _countdownSeconds = 3;
        private Label _lblMessage;
        private Label _lblCountdown;

        public CountdownMessageBox(string message, int seconds = 3)
        {
            _countdownSeconds = seconds;

            // 窗体设置
            this.Text = "提示";
            this.StartPosition = FormStartPosition.CenterScreen;
            this.FormBorderStyle = FormBorderStyle.FixedDialog;
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.ControlBox = false;
            this.TopMost = true;
            this.ShowInTaskbar = false;

            // 设置窗体大小
            this.Size = new Size(400, 200);

            // 创建消息标签 - 关键设置
            _lblMessage = new Label();
            _lblMessage.Text = message;  // 先设置文本
            _lblMessage.Font = new Font("Microsoft YaHei", 10);
            _lblMessage.TextAlign = ContentAlignment.MiddleCenter;
            _lblMessage.AutoSize = false;  // 设置为false
            _lblMessage.Size = new Size(360, 120);  // 明确设置大小
            _lblMessage.Location = new Point(20, 20);

            // 创建倒计时标签
            _lblCountdown = new Label();
            _lblCountdown.Text = $"({_countdownSeconds}秒后自动关闭)";
            _lblCountdown.Font = new Font("Microsoft YaHei", 9);
            _lblCountdown.ForeColor = Color.Blue;
            _lblCountdown.TextAlign = ContentAlignment.MiddleCenter;
            _lblCountdown.AutoSize = false;
            _lblCountdown.Size = new Size(360, 25);
            _lblCountdown.Location = new Point(20, 150);

            // 添加控件
            this.Controls.Add(_lblMessage);
            this.Controls.Add(_lblCountdown);

            // 初始化计时器
            System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer
            {
                Interval = 1000
            };
            timer.Tick += (s, e) =>
            {
                _countdownSeconds--;
                _lblCountdown.Text = $"({_countdownSeconds}秒后自动关闭)";

                if (_countdownSeconds <= 0)
                {
                    timer.Stop();
                    this.Close();
                }
            };

            this.Shown += (s, e) => timer.Start();

            // 确保控件可见
            _lblMessage.Visible = true;
            _lblCountdown.Visible = true;

            // 强制刷新显示
            this.Refresh();
        }
    }
}