Watch NumericTextBoxDouble - 0 instead of 0

There is something odd happens: I put NumericTextBoxDouble in the form, set its value to 0, and it shows - 0. Of course, it should be 0.

Measurement Studio 2013 / VS 2010/2013

It is a known issue with an update made to a Measurement Studio dependency that has been shipped in a recent driver release. This has been fixed in their own country and should be available soon.

Until this fix is available as a solution, you can use a custom value trainer to wrap the existing trainer and correct incorrect negative zero display:

numericTextBox.ValueFormatter = new NegativeZeroCorrection( );

...

public sealed class NegativeZeroCorrection : ValueFormatter {
        private readonly ValueFormatter _inner;

public NegativeZeroCorrection( ValueFormatter inner = null ) {
            _inner = inner ?? new GeneralValueFormatter();
        }

protected override string FormatCore( TData value, ValuePresenterArgs args ) {
            string result = _inner.Format( value, args );
            if( result == "-0" )
                result = "0";
            return result;
        }

public override TData Parse( string value, ValuePresenterArgs args ) {
            return _inner.Parse( value, args );
        }

public override bool TryParse( string value, ValuePresenterArgs args, out TData parsedValue ) {
            return _inner.TryParse( value, args, out parsedValue );
        }

protected override Freezable CreateInstanceCore( ) {
            return new NegativeZeroCorrection( );
        }
    }

Tags: NI Software

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