pictureBox滚动

Question

去 msdn 查ScrollBar , 里面有解决问题的例子

Answer 1

把PictureBox 放到一个 Panel里面, 设置PictureBox的父控件为那个Panel,然后Panel的AutoScroll属性为true

Answer 2

我的ScrollBar是放在了里面好使，仅供参考：
private void pictureBox2_DoubleClick(object sender, System.EventArgs e)
{
if(openFileDialog1.ShowDialog() != DialogResult.Cancel)
{
pictureBox2.Image = Image.FromFile(openFileDialog1.FileName);
this.DisplayScrollBars();
this.SetScrollBarValues();
} } public void DisplayScrollBars()
{
if (pictureBox2.Width > pictureBox2.Image.Width - this.vScrollBar1.Width)
{
hScrollBar2.Visible = false;
}
else
{
//在picturebox控件中添加一个水平滚动条
pictureBox2.Controls.Add (hScrollBar2); 
hScrollBar2.Left =0;
hScrollBar2.Width =pictureBox2.Width ;
hScrollBar2.Dock =System.Windows .Forms .DockStyle .Bottom ;
hScrollBar2.Visible = true;
}
if (pictureBox2.Height > pictureBox2.Image.Height - this.hScrollBar2.Height)
{
vScrollBar2.Visible = false;
}
else
{
//在picturebox控件中添加一个垂直滚动条
pictureBox2.Controls.Add (vScrollBar2); 
vScrollBar2.Top =0;
vScrollBar2.Height  =pictureBox2.Height  ;
vScrollBar2.Dock =System.Windows .Forms .DockStyle.Right;
vScrollBar2.Visible = true;
}
}

public void SetScrollBarValues() 
{
this.vScrollBar2.Minimum = 0;
this.hScrollBar2.Minimum = 0;
if( (this.pictureBox2.Image.Size.Width - pictureBox2.ClientSize.Width) > 0)
{
this.hScrollBar2.Maximum = this.pictureBox2.Image.Size.Width - pictureBox2.ClientSize.Width;
}
if(this.vScrollBar2.Visible)
{
this.hScrollBar2.Maximum += this.vScrollBar2.Width;
}
this.hScrollBar2.LargeChange = this.hScrollBar2.Maximum / 10;
this.hScrollBar2.SmallChange = this.hScrollBar2.Maximum / 20;
this.hScrollBar2.Maximum += this.hScrollBar2.LargeChange;  
if( (this.pictureBox2.Image.Size.Height - pictureBox2.ClientSize.Height) > 0)
{
this.vScrollBar2.Maximum = this.pictureBox2.Image.Size.Height - pictureBox2.ClientSize.Height;
}
if(this.hScrollBar2.Visible)
{
this.vScrollBar2.Maximum += this.hScrollBar2.Height;
}
this.vScrollBar2.LargeChange = this.vScrollBar2.Maximum / 10;
this.vScrollBar2.SmallChange = this.vScrollBar2.Maximum / 20;
this.vScrollBar2.Maximum += this.vScrollBar2.LargeChange;
} private void HandleScroll(Object sender, ScrollEventArgs se)
{
Graphics g = pictureBox2.CreateGraphics();
g.DrawImage(pictureBox2.Image, 
new Rectangle(0, 0, pictureBox2.Right - vScrollBar2.Width,pictureBox2.Bottom - hScrollBar2.Height), 
new Rectangle(hScrollBar2.Value, vScrollBar2.Value,pictureBox2.Right - vScrollBar2.Width,pictureBox2.Bottom - hScrollBar2.Height), 
GraphicsUnit.Pixel);
pictureBox2.Update();
}