kortapp-z/DownloadItem.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace AppStore
{
    public class DownloadItem : UserControl
    {
        private Label nameLabel;
        private ProgressBar progressBar;
        private Label statusLabel;
        private Button cancelBtn;

        public string FileName { get; set; } = string.Empty;
        public int Progress { get; set; }
        public string Status { get; set; } = string.Empty;

        public DownloadItem()
        {
            nameLabel = new Label();
            progressBar = new ProgressBar();
            statusLabel = new Label();
            cancelBtn = new Button();
            
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            this.Size = new Size(400, 60);
            this.BackColor = Color.White;
            this.BorderStyle = BorderStyle.FixedSingle;

            // 文件名标签
            nameLabel = new Label();
            nameLabel.AutoSize = true;
            nameLabel.Location = new Point(10, 10);
            nameLabel.Font = new Font("Microsoft YaHei", 9, FontStyle.Bold);
            this.Controls.Add(nameLabel);

            // 进度条
            progressBar = new ProgressBar();
            progressBar.Size = new Size(200, 20);
            progressBar.Location = new Point(10, 30);
            this.Controls.Add(progressBar);

            // 状态标签
            statusLabel = new Label();
            statusLabel.AutoSize = true;
            statusLabel.Location = new Point(220, 30);
            statusLabel.Font = new Font("Microsoft YaHei", 8);
            this.Controls.Add(statusLabel);

            // 取消按钮
            cancelBtn = new Button();
            cancelBtn.Text = "取消";
            cancelBtn.Size = new Size(60, 25);
            cancelBtn.Location = new Point(320, 30);
            cancelBtn.Click += CancelBtn_Click;
            this.Controls.Add(cancelBtn);
        }

        public void UpdateDisplay()
        {
            nameLabel.Text = FileName;
            progressBar.Value = Progress;
            statusLabel.Text = Status;
        }

        private void CancelBtn_Click(object sender, EventArgs e)
        {
            if (sender == null || e == null) return;
            if (InvokeRequired)
            {
                Invoke(new EventHandler(CancelBtn_Click), sender, e);
                return;
            }

            try
            {
                DownloadManager.Instance.CancelDownload(this);
                Status = "已取消";
                UpdateDisplay();
            }
            catch (Exception ex)
            {
                Status = $"取消失败: {ex.Message}";
                UpdateDisplay();
            }
        }
    }
}