Have RadMaskedNumericInput only allow numbers greater than 0

[Zack]

I've seen code around that will limit RadMaskedNumericInput to be 0 or greater, but I need to exclude 0.

[Stenly]

Hello Zack,

May I ask if it would be possible to set the MaskedInputExtensions.Minimum attached property to 1? This way, the RadMaskedNumericInput element will accept values equal to or higher than 1.

To use it, add the following namespace:

xmlns:maskedInput="clr-namespace:Telerik.Windows.Controls.MaskedInput;assembly=Telerik.Windows.Controls.Input"

The following code snippet showcases this suggestion's implementation:

<telerik:RadMaskedNumericInput maskedInput:MaskedInputExtensions.Minimum="1"/>

With this being said, could you give this suggestion a try?

Regards,
Stenly
Progress Telerik

[Zack]

This does not work as it does not allow numbers between 0 and 1. I specifically need to exclude 0, but allow decimals.

[Stenly]

Hello Zack,

If this is the case, an alternative suggestion that I could provide would be to add validation to the scenario.

For example, you could apply validation through data annotations as shown below:

WPF MaskedInput - Using DataAnnotation Attributes - Telerik UI for WPF

For this suggestion, you could set the Range attribute as follows:

public class MainViewModel : ViewModelBase
{
    private double? value;

    //Value property is bound to the Value property of the RadMaskedNumericInput.
    [Range(0.000001, double.MaxValue, ErrorMessage = "Value must be greater than 0.")]
    public double? Value
    {
        get { return this.value; }
        set
        {
            this.value = value;
            this.OnPropertyChanged(nameof(this.Value));
        }
    }
}

An alternative approach would be to use the IDataErrorInfo interface to validate the Value property. I attached a sample project showcasing this approach.