C # Two code snippets related to winform (multi-threaded Form Control and form fade-in and fade-out effect)

1.Multi-threaded Form Control

Delegate void SetTextCallback (string text );

Private void SetText (string text)

{

// InvokeRequired required compares the thread ID of

// Calling thread to the thread ID of the creating thread.

// If these threads are different, it returns true.

If (this. textBox1.InvokeRequired)

{

SetTextCallback d = new SetTextCallback (SetText );

This. Invoke (d, new object [] {text });

}

Else

{

This. textBox1.Text = text;

}

}

 

SetText (time. ToString ());

 

 

2.

C # several methods for implementing the form fade-in and fade-out effect (convert)

1.

Private void Form1_Load (object sender, System. EventArgs e)

For (double d = 0.01; d <1; d + = 0.02)

{

System. Threading. Thread. Sleep (1 );

Application. DoEvents ();

This. Opacity = d;

This. Refresh ();

}

 

 

2.

 

Private void timerjavastick (Object sender, system. eventargs E)

{

This. Opacity = winshow;

Winshow ++ = 0.1;

If (winshow> = 1)

{

Timer1.dispose ();

}

}

 

 

3.

 

Use a loop or timer,

FrmForm myForm = new frmForm ()

FrmForm. Opacity = 0;

FrmForm. show ();

For (int I = 0; I <100; I ++)

{

Application. DoEvents ()

FrmForm. Opacity = I/100;

}

 

 

4.

 

# Region ******** form fade-in effect function ********

Private double WinShow = 0; // variable used for window fade-in effect

Private void FormShow (System. Windows. Forms. Form Curfrm)

{

Curfrm. Opacity = WinShow;

WinShow ++ = 0.01;

If (WinShow = 1)

{

Curfrm. timerShow. Stop ();

}

}

# Endregion

# Region ******** example of function calling for form fade-in effect ********

// Implement the fade-in effect of the window

Private void timerShow_Tick (object sender, System. EventArgs e)

{

// TimerShow, which is the name of the timer control. Set timerShow. interval to 100.

FormShow (this );

}

# Endregion

 

5.

 

Using System. Runtime. InteropServices;

 

 

Public class Win32

{

Public const Int32 AW_HOR_POSITIVE = 0x00000001; // open the window from left to right

Public const Int32 AW_HOR_NEGATIVE = 0x00000002; // open the window from right to left

Public const Int32 AW_VER_POSITIVE = 0x00000004; // open the window from top to bottom

Public const Int32 AW_VER_NEGATIVE = 0x00000008; // open the window from bottom to top

Public const Int32 AW_CENTER = 0x00000010;

Public const Int32 AW_HIDE = 0x00010000; // This constant must be added if you want to use this function when uninstalling the form.

Public const Int32 AW_ACTIVATE = 0x00020000; // After the form is opened through this function, the focus will be lost by default, unless this constant is added

Public const Int32 AW_SLIDE = 0x00040000;

Public const Int32 AW_BLEND = 0x00080000; // fade-in and fade-out effect

[DllImport ("user32.dll", CharSet = CharSet. Auto)]

Public static extern bool AnimateWindow (

IntPtr hwnd, // handle to window

Int dwTime, // duration of animation

Int dwFlags // animation type

);

}

 

 

 

/* Fade-in form */

 

Private void Form_Load (object sender, EventArgs e)

{

Win32.AnimateWindow (this. Handle, 2000, Win32.AW _ BLEND );

}

 

 

 

/* Fade out form */

 

Private void Form_FormClosing (object sender, FormClosingEventArgs e)

{

Win32.AnimateWindow (this. Handle, 2000, Win32.AW _ SLIDE | Win32.AW _ HIDE | Win32.AW _ BLEND );

}