(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

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);
            }
        }
    }
}

MessageBox.Show("当前窗体标题栏高度"+(this.Height - this.ClientRectangle.Height).ToString());//获得当前窗体标题栏高度 

ClientRectangle//获取表示控件的工作区的矩形 

MessageBox.Show(SystemInformation.PrimaryMonitorSize.ToString()); //获取主显示器屏幕的尺寸(像素) 

//获取主显示器当前当前视频模式的尺寸(以象素为单位) 

MessageBox.Show("菜单栏高度"+SystemInformation.MenuHeight.ToString()); //获取标准菜单栏的高度 

MessageBox.Show("标题栏高度"+SystemInformation.CaptionHeight.ToString()); //获取标准标题栏的高度 

MenuHeight//获取一个菜单行的高度(以象素为单位) 

CaptionHeight//获取窗口的标准标题栏区域的高度(以象素为单位)