ScrollBar.Minimum Property
Important
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Gets or sets the lower limit of values of the scrollable range.
public:
property int Minimum { int get(); void set(int value); };
public int Minimum { get; set; }
member this.Minimum : int with get, set
Public Property Minimum As Integer
A numeric value. The default value is 0.
The following example assumes that you have created a Form, added a PictureBox to the Form, and added a horizontal HScrollBar and a vertical VScrollBar to the PictureBox. This code example is part of a larger example provided for the ScrollBar class overview.
In this example, the Minimum property is set to 0.
You must add references to the System.Drawing and System.Windows.Forms namespaces to run this example.
Notes
For instructions about how to run this example in Visual Studio, see How to: Compile and Run a Complete Windows Forms Code Example Using Visual Studio.
public void SetScrollBarValues()
{
//Set the following scrollbar properties:
//Minimum: Set to 0
//SmallChange and LargeChange: Per UI guidelines, these must be set
// relative to the size of the view that the user sees, not to
// the total size including the unseen part. In this example,
// these must be set relative to the picture box, not to the image.
//Maximum: Calculate in steps:
//Step 1: The maximum to scroll is the size of the unseen part.
//Step 2: Add the size of visible scrollbars if necessary.
//Step 3: Add an adjustment factor of ScrollBar.LargeChange.
//Configure the horizontal scrollbar
//---------------------------------------------
if (this.hScrollBar1.Visible)
{
this.hScrollBar1.Minimum = 0;
this.hScrollBar1.SmallChange = this.pictureBox1.Width / 20;
this.hScrollBar1.LargeChange = this.pictureBox1.Width / 10;
this.hScrollBar1.Maximum = this.pictureBox1.Image.Size.Width - pictureBox1.ClientSize.Width; //step 1
if (this.vScrollBar1.Visible) //step 2
{
this.hScrollBar1.Maximum += this.vScrollBar1.Width;
}
this.hScrollBar1.Maximum += this.hScrollBar1.LargeChange; //step 3
}
//Configure the vertical scrollbar
//---------------------------------------------
if (this.vScrollBar1.Visible)
{
this.vScrollBar1.Minimum = 0;
this.vScrollBar1.SmallChange = this.pictureBox1.Height / 20;
this.vScrollBar1.LargeChange = this.pictureBox1.Height / 10;
this.vScrollBar1.Maximum = this.pictureBox1.Image.Size.Height - pictureBox1.ClientSize.Height; //step 1
if (this.hScrollBar1.Visible) //step 2
{
this.vScrollBar1.Maximum += this.hScrollBar1.Height;
}
this.vScrollBar1.Maximum += this.vScrollBar1.LargeChange; //step 3
}
}
Public Sub SetScrollBarValues()
'Set the following scrollbar properties:
'Minimum: Set to 0
'SmallChange and LargeChange: Per UI guidelines, these must be set
' relative to the size of the view that the user sees, not to
' the total size including the unseen part. In this example,
' these must be set relative to the picture box, not to the image.
'Maximum: Calculate in steps:
'Step 1: The maximum to scroll is the size of the unseen part.
'Step 2: Add the size of visible scrollbars if necessary.
'Step 3: Add an adjustment factor of ScrollBar.LargeChange.
'Configure the horizontal scrollbar
'---------------------------------------------
If (Me.hScrollBar1.Visible) Then
Me.hScrollBar1.Minimum = 0
Me.hScrollBar1.SmallChange = CInt(Me.pictureBox1.Width / 20)
Me.hScrollBar1.LargeChange = CInt(Me.pictureBox1.Width / 10)
Me.hScrollBar1.Maximum = Me.pictureBox1.Image.Size.Width - pictureBox1.ClientSize.Width 'step 1
If (Me.vScrollBar1.Visible) Then 'step 2
Me.hScrollBar1.Maximum += Me.vScrollBar1.Width
End If
Me.hScrollBar1.Maximum += Me.hScrollBar1.LargeChange 'step 3
End If
'Configure the vertical scrollbar
'---------------------------------------------
If (Me.vScrollBar1.Visible) Then
Me.vScrollBar1.Minimum = 0
Me.vScrollBar1.SmallChange = CInt(Me.pictureBox1.Height / 20)
Me.vScrollBar1.LargeChange = CInt(Me.pictureBox1.Height / 10)
Me.vScrollBar1.Maximum = Me.pictureBox1.Image.Size.Height - pictureBox1.ClientSize.Height 'step 1
If (Me.hScrollBar1.Visible) Then 'step 2
Me.vScrollBar1.Maximum += Me.hScrollBar1.Height
End If
Me.vScrollBar1.Maximum += Me.vScrollBar1.LargeChange 'step 3
End If
End Sub
Produit | Versions |
---|---|
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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