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NumericUpDown

in namespace DotVVM.BusinessPack.Controls

Renders an <input> element with buttons on the side that increase or decrease the value.

Usage & Scenarios

A text field which allows to enter numeric values and to increase or decrease them by the specified step.

Sample 1: Basic Usage

The Value property represents the numeric value entered in the control.

The MinValue and MaxValue specifies the range or values which are allowed in the control.

The Step property specifies a value to be added or subtracted when the user clicks the Up and Down buttons in the control.

<bp:NumericUpDown Value="{value: Value}"
                  MinValue="0.5"
                  MaxValue="5"
                  Step="0.5" />
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.businesspack.NumericUpDown.sample1
{
    public class ViewModel : DotvvmViewModelBase
    {
        public double Value { get; set; } = 1.5;
    }
}

Sample 2: Changed Event

The Changed event specifies a command in the viewmodel which is triggered whenever the value is changed.

<bp:NumericUpDown Value="{value: Value}"
                  Changed="{command: ValueChanged()}" />

<p>Numeric value has changed {{value: ChangeCount}} times.</p>
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.businesspack.NumericUpDown.sample2
{
    public class ViewModel : DotvvmViewModelBase
    {
        public double Value { get; set; }
        public int ChangeCount { get; set; }

        public void ValueChanged()
        {
            ChangeCount++;
        }
    }
}

Sample 3: Format Strings

The FormatString property specifies the format that will be used to display the number. Use standard or custom .NET number format strings.

The exact format of the number is determined from the culture that was used in the HTTP request on the server. You can find more info in the Globalization tutorial.

<bp:NumericUpDown Value="{value: Value}"
                  FormatString="C"
                  Step="{value: 0.1}"
                  MinValue="0" />
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.businesspack.NumericUpDown.sample3
{
    public class ViewModel : DotvvmViewModelBase
    {
        public double Value { get; set; }
    }
}

Sample 4: Customizing Icons

The icons used by the control can be customized using the following inner elements:

  • IncreaseIcon represents an icon that allows to increase the value. The default is Plus icon.

  • DecreaseIcon represents an icon that allows to decrease the value. The default is Minus icon.

See the Icon documentation to find about using other icon packs.

<bp:NumericUpDown Value="{value: Value}"
                  MinValue="0.5"
                  MaxValue="5"
                  Step="0.5">
    <IncreaseIcon>
        <bp:Icon Icon="Plus"></bp:Icon>
    </IncreaseIcon>
    <DecreaseIcon>
        <bp:Icon Icon="Minus"></bp:Icon>
    </DecreaseIcon>
</bp:NumericUpDown>
using DotVVM.BusinessPack.Controls;
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.businesspack.NumericUpDown.sample4
{
    public class ViewModel : DotvvmViewModelBase
    {
        public double Value { get; set; } = 1.5;
    }
}

Properties

Name Type Description Notes Default Value
property icon AutoFocus Boolean Gets or sets whether the control should have focus when page loads or when a dialog is opened. The default value is false.
attribute
inner element
static value
bindable
default
 False
property icon DecreaseIcon IconBase Gets or sets the icon displayed on the decrease button.
attribute
inner element
static value
bindable
default
 null
property icon Enabled Boolean Gets or sets whether the control is enabled and can be modified.
attribute
inner element
static value
bindable
default
 True
property icon FormatString String Gets or sets format string used to display the Value.
attribute
inner element
static value
bindable
default
 G
property icon IncreaseIcon IconBase Gets or sets the icon displayed on the increase button.
attribute
inner element
static value
bindable
default
 null
property icon MaxValue Double? Gets or sets the maximum the Value must be less than or equal to.
attribute
inner element
static value
bindable
default
 null
property icon MinValue Double? Gets or sets the minimum the Value must be greater than or equal to.
attribute
inner element
static value
bindable
default
 null
property icon Placeholder String Gets or sets the text displayed when the Value is empty.
attribute
inner element
static value
bindable
default
 null
property icon Step Double Gets or sets a value used to increment or decrement the Value.
attribute
inner element
static value
bindable
default
 1
property icon TabIndex Int32 Gets or sets the order in which the control is reachable in sequential keyboard navigation. The default value is 0 which means the document order.
attribute
inner element
static value
bindable
default
 0
property icon UseFormatStringAsPlaceholder Boolean Gets or sets whether to use FormatString as a placeholder when Placeholder property is not set. It is enabled by default.
attribute
inner element
static value
bindable
default
 True
property icon Value Double? Gets or sets the value displayed in the control.
attribute
inner element
static value
bindable
default
 null
property icon Visible Boolean
attribute
inner element
static value
bindable
default
 True

Events

Name Type Description
event icon Changed Command Gets or sets the command triggered when the value is changed.

HTML produced by the control

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