pictureBox控件上放label或者pictureBox2时背景不透明的问题解决办法：

1、用panel控件代替pictureBox控件

2、将子控件的背景设置成Transparent

 

窗体渐现

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/// <summary>

/// 显示窗体

/// </summary>

private void ShowWin()

{

this.tsmiShowHide.Text = "隐藏";

this.SetWindowState();

this.Opacity = 0;

// 打开窗口渐现效果

Timer tStart = new Timer();

tStart.Interval = 100;

tStart.Tick += new EventHandler(tStart_Tick);

tStart.Start();

}

/// <summary>

/// 隐藏窗体

/// </summary>

private void HideWin()

{

this.tsmiShowHide.Text = "显示";

// 关闭窗口渐现效果

Timer tClose = new Timer();

tClose.Interval = 100;

tClose.Tick += new EventHandler(tClose_Tick);

tClose.Start();

}

/// <summary>

/// 关闭窗体渐现效果

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

void tClose_Tick(object sender, EventArgs e)

{

// 每一次执行透明度减少10%

this.Opacity -= 0.1;

if (this.Opacity <= 0)

{

((Timer)sender).Stop();

}

}

/// <summary>

/// 打开窗体渐现效果

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

void tStart_Tick(object sender, EventArgs e)

{

// 每一次执行透明度增加10%

this.Opacity += 0.1;

if (this.Opacity == 1)

{

((Timer)sender).Stop();

this.Focus();

}

}

 

vs2005里面给控件提供了DrawToBitmap函数   

  例如：   

   

// 保存窗体到图片   

Bitmap   formBitmap    =     new    Bitmap( this .Width,    this .Height);   

this .DrawToBitmap(formBitmap,    new    Rectangle( 0 ,    0 ,    this .Width,    this .Height));   

formBitmap.Save( @" d:\form.bmp " ,   ImageFormat.Bmp);   

// 保存控件DataGridView到图片   

Bitmap   controlBitmap    =     new    Bitmap( this .dataGridView1.Width,    this .dataGridView1.Height);   

this .dataGridView1.DrawToBitmap(controlBitmap,    new    Rectangle( 0 ,    0 ,    this .dataGridView1.Width,    this .dataGridView1.Height));   

controlBitmap.Save( @" d:\control.bmp " ,   ImageFormat.Bmp);