Not displaying the thousand separator and the underline when the control is not being focused is possible with the following combination of properties: Placeholder=" " and AutoFillNumberGroupSeparators="False".
In order to customize the way your masked control behaves when entering input, use the Mask
property, for instance like this Mask="#4.2".
As for the question about showing 0.00 when the input is selected and then deleted, this can be achieved with the help of MaskedInputExtensions
. Include the extensions' namespace first xmlns:maskedInput="clr-namespace:Telerik.Windows.Controls.MaskedInput;assembly=Telerik.Windows.Controls.Input" and then set the AllowNull property to False.
Below is a sample showing the above approach:
Hope this helps.
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