如何使winform应用程序全屏并覆盖任务栏

Question

我尝试了How do I make a WinForms app go Full Screen 和How to display a Windows Form in full screen on top of the taskbar 下的所有答案。但它们不能工作（意味着任务栏可见）。
设置 TopMost = true 是一个不好的方法，因为它不能通过 Alt+Tab 切换窗口。

我认为 WindowState = FormWindowState.Maximized 与 AutoSize 冲突。 （我已将 AutoSize 设置为 True，将 AutoSizeMode 设置为 GrowAndShrink 以使其适应面板。）

代码如下（注意FormBorderStyle=和WindowState=的顺序）：

public void fullScreenDisplay()
{
    this.currentPanelSize = new Size(this.mainPanel.ClientSize.Width, this.mainPanel.ClientSize.Height);

    this.FormBorderStyle = FormBorderStyle.None;
    //this.TopMost = true;
    //Rectangle ret = Screen.GetWorkingArea(this);
    Rectangle ret = Screen.PrimaryScreen.Bounds;

    this.mainPanel.ClientSize = new Size(ret.Width, ret.Height);
    //this.mainPanel.Dock = DockStyle.Fill;
    this.mainPanel.BringToFront();

    this.WindowState = FormWindowState.Maximized;
}

Designer.cs的代码：

private void InitializeComponent()
{ 
    this.mainPanel = new System.Windows.Forms.Panel();
    this.SuspendLayout();
    // 
    // mainPanel
    // 
    this.mainPanel.Location = new System.Drawing.Point(0, 0);
    this.mainPanel.Margin = new System.Windows.Forms.Padding(0);
    this.mainPanel.Name = "mainPanel";
    this.mainPanel.Size = new System.Drawing.Size(1600, 900);
    this.mainPanel.TabIndex = 0;
    this.mainPanel.Paint += new System.Windows.Forms.PaintEventHandler(this.mainPanel_Paint);
    // 
    // MainForm
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.AutoSize = true;
    this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
    this.ClientSize = new System.Drawing.Size(120, 0);
    this.Controls.Add(this.mainPanel);
    this.MaximizeBox = false;
    this.Name = "MainForm";
    this.Text = "MainForm";
    this.Load += new System.EventHandler(this.MainForm_Load);
    this.ResumeLayout(false);

}

我正在使用 Windows10。

Answer 1

这就是我们正在使用的——我们是多屏的，它们都是全覆盖的任务栏

mainForm.WindowState = FormWindowState.Normal;
mainForm.FormBorderStyle = FormBorderStyle.Sizable;
mainForm.StartPosition = FormStartPosition.Manual;
mainForm.Location = this.SystemScreen.Bounds.Location;
mainForm.FormBorderStyle = FormBorderStyle.None;
mainForm.Size = this.SystemScreen.Bounds.Size;
mainForm.WindowState = FormWindowState.Maximized;

SystemScreen 是System.Windows.Forms.Screen

但这只是为了获取屏幕的尺寸 你可以通过Screen.AllScreens获取你的屏幕

Answer 2

这对我来说是全屏并越过任务栏
（还有AutoSize = true 和AutoSizeMode = AutoSizeMode.GrowAndShrink）

public void fullScreenDisplay()
{
    // This is required if the form reaches this code in maximized state
    // otherwise the TaskBar remains on top of the form
    this.WindowState = FormWindowState.Normal;

    this.FormBorderStyle = FormBorderStyle.None;
    this.WindowState = FormWindowState.Maximized;
    this.mainPanel.Dock = DockStyle.Fill;
    this.BringToFront();
}

换句话说，如果您希望获得默认行为，请不要尝试为表单和面板设置尺寸。而是强制面板停靠在表单的完整尺寸内。