c# winform 应用编程代码总结 1
1、渐显的窗体
放一个定时器Interval 设置为100 ， 在响应的函数中添加
private void Form1_Load(object sender, System.EventArgs e)
{
this.timer1.Enabled=true;
this.Opacity=0;
}
private void timer1_Tick(object sender, System.EventArgs e)
{
if(this.Opacity<1)
{
this.Opacity=this.Opacity+0.05;
}
else
{
this.timer1.Enabled=false;
}
}
2、设置顶级窗口
把TopMost 、 TopLevel 都设置为true就OK了！
3、设置一个多边形的窗口
引入要使用的函数
[DllImport("gdi32")]
private static extern IntPtr CreatePolygonRgn(Point[] lpPoint,int nCount,int nPolyFillMode);
[DllImport("user32")]
private static extern IntPtr SetWindowRgn(IntPtr hWnd,IntPtr hRgn,bool bRedraw);
在窗口load的时候设置形状！
Point[] pt={
new Point(this.Width /2,0),
new Point(0,this.Height/2),
new Point(this.Width/2,this.Height),
new Point(this.Width,this.Height/2),
new Point(this.Width,0)
};
IntPtr m_rgn;
m_rgn=CreatePolygonRgn(pt,5,WINDING);
SetWindowRgn(this.Handle,m_rgn,true);
4、设置圆形窗口
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern IntPtr BeginPath(IntPtr hdc);
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern int SetBkMode(IntPtr hdc,int nBkMode);
const int TRANSPARENT = 1;
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern IntPtr EndPath(IntPtr hdc);
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern IntPtr PathToRegion(IntPtr hdc);
[System.Runtime.InteropServices.DllImport("gdi32")]
private static extern int Ellipse(IntPtr hdc, int X1,int Y1, int X2,int Y2);
[System.Runtime.InteropServices.DllImport("user32")]
private static extern IntPtr SetWindowRgn(IntPtr hwnd,IntPtr hRgn,bool bRedraw);
[System.Runtime.InteropServices.DllImport("user32")]
private static extern IntPtr GetDC(IntPtr hwnd);
private void Form1_Load(object sender, System.EventArgs e)
{
IntPtr dc;
IntPtr region;
dc=GetDC(this.Handle);
BeginPath(dc);
//根据路径创建不规则窗体
SetBkMode(dc,TRANSPARENT);
//设置为透明模式
Ellipse(dc,20,20,220,220);
EndPath(dc);
region=PathToRegion(dc);
SetWindowRgn(this.Handle,region,true);
}
const int WM_NCHITTEST = 0x0084;
const int HTCLIENT = 0x0001;
const int HTCAPTION = 0x0002;
protected override void WndProc(ref System.Windows.Forms.Message m)
{
switch(m.Msg)
{
case WM_NCHITTEST:
base.WndProc(ref m);
if (m.Result==(IntPtr)HTCLIENT)
m.Result=(IntPtr)HTCAPTION;
break;
default:
base.WndProc(ref m);
break;
}
}
}
5 、渐变的窗口背景
private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics g=e.Graphics;
Color FColor=Color.Blue;
Color TColor=Color.Yellow;
Brush b =new LinearGradientBrush(this.ClientRectangle, FColor, TColor, LinearGradientMode.ForwardDiagonal);
g.FillRectangle(b,this.ClientRectangle);
}
private void Form1_Resize(object sender, System.EventArgs e)
{
this.Invalidate();
}
6、无标题窗口的拖动
[DllImport("user32.dll")]
public static extern bool ReleaseCapture();
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd,int wMsg,int wParam,int lParam);
public const int WM_SYSCOMMAND=0x0112;
public const int SC_MOVE=0xF010;
public const int HTCAPTION=0x0002;
private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
ReleaseCapture();
SendMessage(this.Handle,WM_SYSCOMMAND,SC_MOVE+HTCAPTION, 0);
}
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