[转载]WinForm全窗口显示遮罩层效果和进度条

运行效果如下：

自定义控件核心代码：

/// <summary>
/// 遮罩层
/// </summary>
[Designer("System.Windows.Forms.Design.ParentControlDesigner, System.Design", typeof(IDesigner))]
public class MaskLayer : Control
{
    /// <summary>
    /// 遮罩层
    /// </summary>
    public MaskLayer()
    {
        SetStyle(ControlStyles.UserPaint, true);
        SetStyle(ControlStyles.AllPaintingInWmPaint, true);
        SetStyle(ControlStyles.Opaque, true);
        SetStyle(ControlStyles.SupportsTransparentBackColor, true);
        CreateControl();
        Visible = false;
 
        this.Dock = DockStyle.Fill;
        this.Controls.Add(progressBar);
    }
    /// <summary>
    /// 进度条
    /// </summary>
    public ProgressBar progressBar = new ProgressBar();
 
    /// <summary>
    /// 设置进度条显示值
    /// </summary>
    /// <param name="value"></param>
    public void SetProgressBarValue(int value)
    {
        this.BeginInvoke(new Action(() =>
        {
            if (value <= progressBar.Maximum)
            {
                progressBar.Value = value;
            }
        }));
    }
    private int _Alpha = 125;
    /// <summary>
    /// 透明度<para>范围：0~255（完全透明~完全不透明）</para><para>默认：125（半透明）</para>
    /// </summary>
    [Category("DemoUI"), Description("透明度\r\n范围：0~255（完全透明~完全不透明）\r\n默认：125（半透明）")]
    public int Alpha
    {
        get { return _Alpha; }
        set
        {
            if (value < 0) value = 0;
            if (value > 255) value = 255;
            _Alpha = value;
            Invalidate();
        }
    }
 
    /// <summary>
    /// 是否处于显示状态
    /// </summary>
    [Category("LESLIE_UI"), Description("是否处于显示状态"), Browsable(false)]
    public bool IsShow { get; private set; } = true;
 
 
 
    /// <summary>
    /// OnPaint
    /// </summary>
    /// <param name="e"></param>
    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);
        SolidBrush BackColorBrush = new SolidBrush(Color.FromArgb(_Alpha, BackColor));
        e.Graphics.FillRectangle(BackColorBrush, e.ClipRectangle);
        BackColorBrush.Dispose();
    }
    /// <summary>
    /// 是否启用点击隐藏功能<para>默认：是</para>
    /// </summary>
    [Category("DemoUI"), Description("是否启用点击隐藏功能\r\n默认：否")]
    public bool EnabledClickHide { get; set; } = false;
    /// <summary>
    /// 点击事件
    /// </summary>
    /// <param name="e"></param>
    protected override void OnClick(EventArgs e)
    {
        base.OnClick(e);
        if (EnabledClickHide)
        {
            HideMask();
        }
    }
 
    /// <summary>
    /// 显示遮罩层
    /// </summary>
    public void ShowMask()
    {
        try
        {
            this.BeginInvoke(new Action(() =>
            {
                IsShow = true;
                SendKeys.Send("{Tab}");
 
                BringToFront();
                this.Visible = true;
                this.BackColor = Color.Black;
                Show();
 
                int x = (int)(this.Width * 0.1);
                int y = this.Height / 2;
                this.progressBar.Location = new System.Drawing.Point(x, y);
                this.progressBar.Name = "progressBar";
                int w = (int)(this.Width * 0.8);
                this.progressBar.Size = new System.Drawing.Size(w, 23);
                this.progressBar.TabIndex = 2;
            }));
        }
        catch (Exception)
        {
        }
    }
 
    /// <summary>
    /// 隐藏遮罩层
    /// </summary>
    public void HideMask()
    {
        try
        {
            this.BeginInvoke(new Action(() =>
            {
                IsShow = false;
                SendToBack();
                Visible = false;
                Hide();
            }));
        }
        catch (Exception)
        {
        }
    } 
}

调用控件：

public partial class Form1 : Form
{
    MaskLayer lMaskLayer1 = new MaskLayer();
    public Form1()
    {
        InitializeComponent();
        this.Controls.Add(lMaskLayer1);
    }
 
    private void button1_Click(object sender, EventArgs e)
    {
        Thread t3 = new Thread(pShow);
        t3.IsBackground = true;
        t3.Start();
    }
 
    void pShow()
    {
        lMaskLayer1.ShowMask();
        for (int i = 0; i < 100; i++)
        {
            lMaskLayer1.SetProgressBarValue(i);
            Thread.Sleep(200);
        }
        lMaskLayer1.HideMask();
    }
}

 链接：https://pan.baidu.com/s/1gc6ofo1xT-AgNkL6BY_vuA?pwd=5shv 
提取码：5shv 

本文来自：罗分明博客 原文：http://www.luofenming.com/show.aspx?id=ART2022052200001