控制窗体最大化，

1. 窗体最大化时 非全屏 不会遮盖任务栏

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

2. 窗体最大化时 会全屏 及遮盖任务栏
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; 
      } 
   }
此时this.FormBorderStyle. 为 None 不会显示窗体标题栏等相关

 

3. 窗体最大化时 非全屏 不会遮盖任务栏
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; 
      } 
   }

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)