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

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->
/// <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);