NumericUpDown.Increment 属性

定义

获取或设置单击向上或向下按钮时,数字显示框(也称作 up-down 控件)递增或递减的值。Gets or sets the value to increment or decrement the spin box (also known as an up-down control) when the up or down buttons are clicked.

public:
 property System::Decimal Increment { System::Decimal get(); void set(System::Decimal value); };
public decimal Increment { get; set; }
member this.Increment : decimal with get, set
Public Property Increment As Decimal

属性值

单击数字显示框上的向上或向下按钮时 Value 属性要递增或递减的值。The value to increment or decrement the Value property when the up or down buttons are clicked on the spin box. 默认值为 1。The default value is 1.

例外

所赋的值不大于或等于零。The assigned value is not greater than or equal to zero.

示例

下面的代码示例创建并初始化一个 NumericUpDown 控件,设置其一些公共属性,并允许用户在运行时更改其中的某些属性。The following code example creates and initializes a NumericUpDown control, sets some of its common properties, and allows the user to change some of these properties at run time. 此代码假定已将三个 CheckBox 控件放置在窗体上,并且已实例化其 Click 事件的处理程序。This code assumes three CheckBox controls have been placed on a form and handlers for their Click events have been instantiated. DecimalPlacesThousandsSeparatorHexadecimal 属性设置为每个复选框的 Click 事件。The DecimalPlaces, ThousandsSeparator, and Hexadecimal properties are set on the Click event of each check box.

public:
   void InstantiateMyNumericUpDown()
   {
      // Create and initialize a NumericUpDown control.
      numericUpDown1 = gcnew NumericUpDown;
      
      // Dock the control to the top of the form.
      numericUpDown1->Dock = System::Windows::Forms::DockStyle::Top;
      
      // Set the Minimum, Maximum, and initial Value.
      numericUpDown1->Value = 5;
      numericUpDown1->Maximum = 2500;
      numericUpDown1->Minimum = -100;
      
      // Add the NumericUpDown to the Form.
      Controls->Add( numericUpDown1 );
   }

private:
   // Check box to toggle decimal places to be displayed.
   void checkBox1_Click( Object^ sender, EventArgs^ e )
   {
      /* If DecimalPlaces is greater than 0, set them to 0 and round the 
         current Value; otherwise, set DecimalPlaces to 2 and change the 
         Increment to 0.25. */
      if ( numericUpDown1->DecimalPlaces > 0 )
      {
         numericUpDown1->DecimalPlaces = 0;
         numericUpDown1->Value = Decimal::Round( numericUpDown1->Value, 0 );
      }
      else
      {
         numericUpDown1->DecimalPlaces = 2;
         numericUpDown1->Increment = Decimal(0.25);
      }
   }

   // Check box to toggle thousands separators to be displayed.
   void checkBox2_Click( Object^ sender, EventArgs^ e )
   {
      /* If ThousandsSeparator is true, set it to false; 
         otherwise, set it to true. */
      if ( numericUpDown1->ThousandsSeparator )
      {
         numericUpDown1->ThousandsSeparator = false;
      }
      else
      {
         numericUpDown1->ThousandsSeparator = true;
      }
   }

   // Check box to toggle hexadecimal to be displayed.
   void checkBox3_Click( Object^ sender, EventArgs^ e )
   {
      /* If Hexadecimal is true, set it to false; 
         otherwise, set it to true. */
      if ( numericUpDown1->Hexadecimal )
      {
         numericUpDown1->Hexadecimal = false;
      }
      else
      {
         numericUpDown1->Hexadecimal = true;
      }
   }
public void InstantiateMyNumericUpDown()
{
   // Create and initialize a NumericUpDown control.
   numericUpDown1 = new NumericUpDown();

   // Dock the control to the top of the form.
   numericUpDown1.Dock = System.Windows.Forms.DockStyle.Top;

   // Set the Minimum, Maximum, and initial Value.
   numericUpDown1.Value = 5;
   numericUpDown1.Maximum = 2500;
   numericUpDown1.Minimum = -100;
   
   // Add the NumericUpDown to the Form.
   Controls.Add(numericUpDown1);
}

// Check box to toggle decimal places to be displayed.
private void checkBox1_Click(Object sender,
                             EventArgs e)
{
   /* If DecimalPlaces is greater than 0, set them to 0 and round the 
      current Value; otherwise, set DecimalPlaces to 2 and change the 
      Increment to 0.25. */
   if (numericUpDown1.DecimalPlaces > 0)
   {
      numericUpDown1.DecimalPlaces = 0;
      numericUpDown1.Value = Decimal.Round(numericUpDown1.Value, 0);
   }
   else
   {
      numericUpDown1.DecimalPlaces = 2;
      numericUpDown1.Increment = 0.25M;
   }
}

// Check box to toggle thousands separators to be displayed.
private void checkBox2_Click(Object sender,
                             EventArgs e)
{   
   /* If ThousandsSeparator is true, set it to false; 
      otherwise, set it to true. */
   if (numericUpDown1.ThousandsSeparator)
   {
      numericUpDown1.ThousandsSeparator = false;
   }
   else
   {
      numericUpDown1.ThousandsSeparator = true;
   }
}

// Check box to toggle hexadecimal to be displayed.
private void checkBox3_Click(Object sender, 
                             EventArgs e)
{
   /* If Hexadecimal is true, set it to false; 
      otherwise, set it to true. */    
   if (numericUpDown1.Hexadecimal)
   {
      numericUpDown1.Hexadecimal = false;
   }
   else
   {
      numericUpDown1.Hexadecimal = true;
   }
}

Public Sub InstantiateMyNumericUpDown()
    ' Create and initialize a NumericUpDown control.
    numericUpDown1 = New NumericUpDown()
    
    ' Dock the control to the top of the form.
    numericUpDown1.Dock = System.Windows.Forms.DockStyle.Top
    
    ' Set the Minimum, Maximum, and initial Value.
    numericUpDown1.Value = 5
    numericUpDown1.Maximum = 2500
    numericUpDown1.Minimum = - 100
    
    ' Add the NumericUpDown to the Form.
    Controls.Add(numericUpDown1)
End Sub    

' Check box to toggle decimal places to be displayed.
Private Sub checkBox1_Click(sender As Object, e As EventArgs)
    ' If DecimalPlaces is greater than 0, set them to 0 and round the
    ' current Value; otherwise, set DecimalPlaces to 2 and change the
    ' Increment to 0.25. 
    If numericUpDown1.DecimalPlaces > 0 Then
        numericUpDown1.DecimalPlaces = 0
        numericUpDown1.Value = Decimal.Round(numericUpDown1.Value, 0)
    Else
        numericUpDown1.DecimalPlaces = 2
        numericUpDown1.Increment = 0.25D
    End If
End Sub    

' Check box to toggle thousands separators to be displayed.
Private Sub checkBox2_Click(sender As Object, e As EventArgs)
    ' If ThousandsSeparator is true, set it to false;
    ' otherwise, set it to true. 
    If numericUpDown1.ThousandsSeparator Then
        numericUpDown1.ThousandsSeparator = False
    Else
        numericUpDown1.ThousandsSeparator = True
    End If
End Sub    

' Check box to toggle hexadecimal to be displayed.
Private Sub checkBox3_Click(sender As Object, e As EventArgs)
    ' If Hexadecimal is true, set it to false;
    ' otherwise, set it to true. 
    If numericUpDown1.Hexadecimal Then
        numericUpDown1.Hexadecimal = False
    Else
        numericUpDown1.Hexadecimal = True
    End If
End Sub

注解

单击 "向上" 按钮会使 Value 属性按 Increment 属性指定的数量递增,并使用 Maximum 属性。Clicking the up button causes the Value property to increment by the amount specified by the Increment property and approach the Maximum property. 单击 "向下" 按钮将导致 Value 属性按 Increment 属性指定的量递减,并使用 Minimum 属性。Clicking the down button causes the Value property to be decremented by the amount specified by the Increment property and approach the Minimum property.

适用于

另请参阅