(转)C#WinForm关于窗体最大化时的是否全屏效果与是否遮盖任务栏 ...

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0.新建窗体及添加按钮

1. 执行如下按钮事件

private void btnFormMax_Click(object sender, EventArgs e) 
{
    if (this.WindowState == FormWindowState.Maximized)
    { 
        this.WindowState = FormWindowState.Normal; 
    } 
    else
    { 
        this.WindowState = FormWindowState.Maximized;
    }
}

窗体最大化时非全屏不会遮盖任务栏

此时this.FormBorderStyle 默认为 Sizable

2. 执行如下按钮事件

private void btnFormMax_Click(object sender, EventArgs e)
{
    if (this.WindowState == FormWindowState.Maximized)
    {
        this.WindowState = FormWindowState.Normal;
    }
    else
    {
        this.FormBorderStyle = FormBorderStyle.None;
        this.WindowState = FormWindowState.Maximized;
    }
}

窗体最大化时会全屏及遮盖任务栏

此时this.FormBorderStyle 为 None 不会显示窗体标题栏等相关

3. 执行如下按钮事件

private void btnFormMax_Click(object sender, EventArgs e)
{
    if (this.WindowState == FormWindowState.Maximized)
    {
        this.WindowState = FormWindowState.Normal;
    }
    else
    {
        this.FormBorderStyle = FormBorderStyle.None;
        this.MaximumSize = new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);
        this.WindowState = FormWindowState.Maximized;
    }
}

窗体最大化时非全屏不会遮盖任务栏

此时this.FormBorderStyle 为 None 不会显示窗体标题栏等相关

[转]窗体最大化的时候，如何指定窗体的位置、大小(C#)

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms;
namespace WindowsApplication1
{
    public partial class FormRegion : Form
    {
        private const long WM_GETMINMAXINFO = 0x24;
        public struct POINTAPI
        {
            public int x;
            public int y;
        }
        public struct MINMAXINFO
        {
            public POINTAPI ptReserved;
            public POINTAPI ptMaxSize;
            public POINTAPI ptMaxPosition;
            public POINTAPI ptMinTrackSize;
            public POINTAPI ptMaxTrackSize;
        }
        public FormRegion()
        {
            InitializeComponent();
            this.MaximumSize = new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);
        }
        protected override void WndProc(ref System.Windows.Forms.Message m)
        {
            base.WndProc(ref m);
            if (m.Msg == WM_GETMINMAXINFO)
            {
                MINMAXINFO mmi = (MINMAXINFO)m.GetLParam(typeof(MINMAXINFO));
                mmi.ptMinTrackSize.x = this.MinimumSize.Width;
                mmi.ptMinTrackSize.y = this.MinimumSize.Height;
                if (this.MaximumSize.Width != 0 || this.MaximumSize.Height != 0)
                {
                    mmi.ptMaxTrackSize.x = this.MaximumSize.Width;
                    mmi.ptMaxTrackSize.y = this.MaximumSize.Height;
                }
                mmi.ptMaxPosition.x = 1;
                mmi.ptMaxPosition.y = 1;
                System.Runtime.InteropServices.Marshal.StructureToPtr(mmi, m.LParam, true);
            }
        }
    }
}