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#) http://www.cnblogs.com/adandelion/archive/2008/04/03/1136198.html 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)