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Numeric Field

Numeric field components are used for receiving user provided numbers.

See Numeric Field API for parameter documentation.

Basic Numeric Field's

Numeric fields are just like text fields but work well with numeric values of any type. The input is automatically restricted to numeric values and it works regardless of the browser locale settings for decimal types.
Min and Max attributes allow to restrict the value within the limits. If they are not specified, the full value range for the type (i.e -2147483648 and 2147483647 for int) is permitted. The Step attribute defines how much the value changes when using the up/down buttons on the right, or with the up/down keys on the keyboard. If not specified, the default value is 1.

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<MudGrid>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="IntValue" Label="Standard" Variant="Variant.Text" Min="0" Max="10" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="DoubleValue" Label="Filled" Variant="Variant.Filled" Min="0.0" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="DecimalValue" Label="Outlined" Variant="Variant.Outlined" Step=".2M" />
    </MudItem>
</MudGrid>
@code {
    public int IntValue { get; set; }
    public double DoubleValue { get; set; }
    public decimal DecimalValue { get; set; }
}

Dense

With the margin prop you can reduce the field height.

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<MudGrid>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Value" Label="Standard" Variant="Variant.Text" Margin="Margin.Dense" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Value" Label="Filled" Variant="Variant.Filled" Margin="Margin.Dense" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Value" Label="Outlined" Variant="Variant.Outlined" Margin="Margin.Dense" />
    </MudItem>
</MudGrid>
@code {
    public int Value { get; set; }
}

Form Props

Required, Disabled, Type, HelperText

Some helping Text

Some helping Text

Some helping Text

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<MudGrid>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Helper" Label="With Helper" HelperText="Some helping Text" Variant="Variant.Text" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Disabled" Label="Disabled" Variant="Variant.Text" Disabled="true" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="ReadOnly" Label="Read Only" ReadOnly="true" Variant="Variant.Text" />
    </MudItem>

    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Helper" Label="With Helper" HelperText="Some helping Text" Variant="Variant.Filled" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Disabled" Label="Disabled" Variant="Variant.Filled" Disabled="true" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="ReadOnly" Label="Read Only" ReadOnly="true" Variant="Variant.Filled" />
    </MudItem>

    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Helper" Label="With Helper" HelperText="Some helping Text" Variant="Variant.Outlined" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Disabled" Label="Disabled" Variant="Variant.Outlined" Disabled="true" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="ReadOnly" Label="Read Only" ReadOnly="true" Variant="Variant.Outlined" />
    </MudItem>
</MudGrid>
@code {
    public int? Helper { get; set; }
    public int Disabled { get; set; } = 2020;
    public int ReadOnly { get; set; } = 101;
}

Adornments

This can be used to add a prefix or a suffix. Text, Icon or Icon Button.

Kr

Kg

Weight

Kg

Weight

Kg

Weight

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<MudGrid>
    <MudItem xs="12" sm="12" md="12">
        <MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Text" Adornment="Adornment.Start" AdornmentText="Kr" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Text" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Weight" HelperText="Weight" Variant="Variant.Text" Adornment="Adornment.End" AdornmentText="Kg" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Filled" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Weight" HelperText="Weight" Variant="Variant.Filled" Adornment="Adornment.End" AdornmentText="Kg" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Outlined" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="Weight" HelperText="Weight" Variant="Variant.Outlined" Adornment="Adornment.End" AdornmentText="Kg" />
    </MudItem>
</MudGrid>
@code {
    public decimal? Amount { get; set; }
    public float? Weight { get; set; }
}

Hide Spin Buttons

This property can be set to hide the spinner buttons, preventing the user to increase and decrease the value by mouse or touch input.
It can still be changed with the keyboard up/down keys, or manually.

Kg

Weight

Kg

Weight

Kg

Weight

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<MudGrid>
	<MudItem xs="12" sm="6" md="4">
		<MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Text" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" HideSpinButtons="true" />
	</MudItem>
	<MudItem xs="12" sm="6" md="4">
		<MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Filled" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" HideSpinButtons="true" />
	</MudItem>
	<MudItem xs="12" sm="6" md="4">
		<MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Outlined" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" HideSpinButtons="true" />
	</MudItem>
	<MudItem xs="12" sm="6" md="4">
		<MudNumericField @bind-Value="Weight" HelperText="Weight" Variant="Variant.Text" Adornment="Adornment.End" AdornmentText="Kg" HideSpinButtons="true" />
	</MudItem>
	<MudItem xs="12" sm="6" md="4">
		<MudNumericField @bind-Value="Weight" HelperText="Weight" Variant="Variant.Filled" Adornment="Adornment.End" AdornmentText="Kg" HideSpinButtons="true" />
	</MudItem>
	<MudItem xs="12" sm="6" md="4">
		<MudNumericField @bind-Value="Weight" HelperText="Weight" Variant="Variant.Outlined" Adornment="Adornment.End" AdornmentText="Kg" HideSpinButtons="true" />
	</MudItem>
</MudGrid>
@code {
	public decimal? Amount { get; set; }
	public float? Weight { get; set; }
}

Adornment Color

The color of the adornment can be changed separately from the NumericField.

Kg

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<MudGrid>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="Amount" Label="Amount" Variant="Variant.Outlined" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.AttachMoney" AdornmentColor="Color.Warning" />
    </MudItem>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="Weight" Label="Weight" Variant="Variant.Outlined" Adornment="Adornment.End" AdornmentText="Kg" AdornmentColor="Color.Info" />
    </MudItem>
</MudGrid>
@code {
    public decimal? Amount { get; set; }
    public float? Weight { get; set; }
}

Binding Properties of a POCO

The following text fields are bound against the properties of a POCO (Plain old C-Sharp Object). Edit them to see the model change. Reset the model and see the NumericFields change.

Name: Hydrogen

Mass: 1.00794 u

Electrons: 1

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<MudGrid>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="@element.Mass" Label="Mass" HideSpinButtons="true"/>
    </MudItem>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="@element.Electrons" Label="Electrons" Min="1" />
    </MudItem>
</MudGrid>
<div class="mt-3 ml-0 d-flex">
    <div>
        <MudText>Name: @element.Name</MudText>
        <MudText>Mass: @element.Mass u</MudText>
        <MudText>Electrons: @element.Electrons</MudText>
    </div>
    <div class="d-flex ml-auto align-center">
        <MudButton Variant="Variant.Filled" OnClick="Reset">Reset Model</MudButton>
    </div>
</div>
@code {
    Atom element = new Atom { Name = "Hydrogen", Mass = 1.00794, Electrons = 1 };

    // A typical POCO
    public class Atom
    {
        public string Name { get; set; }
        public double Mass { get; set; }
        public int Electrons { get; set; }
    }

    private void Reset()
    {
        element = new Atom { Name = "Hydrogen", Mass = 1.00794, Electrons = 1 };
        StateHasChanged();
    }

}

Binding Value Types vs Nullables

When you bind value types, the numeric field will not be empty even if the user hasn't entered a value yet because a value type always has a value, even when unassigned. The two-way-bindable Value property will automatically assume the default value of that type (i.e. 0 for int).
Thus, if you want your numeric fields to be empty, as long as nothing has been entered yet or after the field has been cleared, use the nullable version of that type (i.e. int?).
Do not assign null values to Min, Max and Step.

Enter an int

Enter a double

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<MudGrid>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="intValue" Label="Enter an int" />
    </MudItem>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="doubleValue" Label="Enter a double" Format="F1" />
    </MudItem>
</MudGrid>
<MudGrid>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="nullableInt" HelperText="Enter an int" />
    </MudItem>
    <MudItem xs="12" sm="6">
        <MudNumericField @bind-Value="nullableDouble" HelperText="Enter a double" Format="F1" />
    </MudItem>
</MudGrid>
@code { 
    int intValue;
    double doubleValue;
    int? nullableInt;
    double? nullableDouble;
}

Normal vs Immediate vs Debounced

By default, MudNumericField updates the bound value on Enter or when it looses focus. Set Immediate="true" to update the value whenever the user types.
You can also set the DebounceInterval parameter to the number of milliseconds you want to wait before updating the bound value. If you need to know when the interval elapses, you can pass an OnDebounceIntervalElapsed EventCallback. Notice how in this example the debounced text only updates 500 ms after you stop typing.

Normal: 0

Immediate: 0

Debounced: 0

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<MudGrid>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="@_normal"
                         Label="Normal"
                         Variant="Variant.Outlined" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="@_immediate"
                         Label="Immediate"
                         Variant="Variant.Outlined"
                         Adornment="Adornment.End"
                         Immediate="true" />
    </MudItem>
    <MudItem xs="12" sm="6" md="4">
        <MudNumericField @bind-Value="@_debounced"
                      Label="Debounced"
                      Variant="Variant.Outlined"
                      Adornment="Adornment.End"
                      DebounceInterval="500"
                      OnDebounceIntervalElapsed="HandleIntervalElapsed" />
    </MudItem>
</MudGrid>
<div class="mt-3">
    <MudText>Normal: @_normal</MudText>
    <MudText>Immediate: @_immediate</MudText>
    <MudText>Debounced: @_debounced</MudText>
</div>
@code {
    double _normal;
    double _immediate;
    double _debounced;

    void HandleIntervalElapsed(string debouncedText)
    {
        // at this stage, interval has elapsed
        //Notice that debouncedText is string, not a number
    }
}

Focus

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<MudGrid>
    <MudItem xs="12">
        <MudNumericField @ref="intReference" Label="Manual focus" Variant="Variant.Filled" @bind-Value="@intValue" />
    </MudItem>
    <MudItem xs="12" Class="d-flex justify-end">
        <MudButton @onclick="() => intReference.FocusAsync()">
            Focus
        </MudButton>
    </MudItem>
    <MudItem xs="12">
        <MudNumericField @ref="doubleReference" Label="Manual focus" Variant="Variant.Filled" @bind-Value="@doubleValue" />
    </MudItem>
    <MudItem xs="12" Class="d-flex justify-end">
        <MudButton @onclick="() => doubleReference.FocusAsync()">
            Focus
        </MudButton>
    </MudItem>
</MudGrid>
@code
{
    private MudNumericField<int> intReference;
    private MudNumericField<double> doubleReference;

    int intValue = 100;
    double doubleValue = Math.PI;
}

Select

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<MudGrid>
    <MudItem xs="12">
        <MudNumericField @ref="doubleReference" Label="Select" Variant="Variant.Filled" @bind-Value="@value" />
    </MudItem>
    <MudItem xs="12" Class="d-flex justify-end">
        <MudButton @onclick="() => doubleReference.SelectAsync()">
            Select
        </MudButton>
    </MudItem>
</MudGrid>
@code
{
    private MudNumericField<double> doubleReference;

    double value = Math.PI;
}

Inputs

Error text.

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<MudGrid>
	<MudItem xs="12" sm="6" md="3">
		<MudNumericField T="double" Label="Basic Input" />
	</MudItem>
	<MudItem xs="12" sm="6" md="3">
		<MudNumericField T="int?" Placeholder="Placeholder" />
	</MudItem>
	<MudItem xs="12" sm="6" md="3">
		<MudNumericField Value="0" Label="Disabled" Disabled="true" />
	</MudItem>
	<MudItem xs="12" sm="6" md="3">
		<MudNumericField Value="2" Label="Error" Error="true" ErrorText="Error text." />
	</MudItem>
</MudGrid>
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