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POStruggling to come up with a generic C# method that compares different types of numeric objects
 

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  1. POStruggling to come up with a generic C# method that compares different types of numeric objects
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    <p>I have an Infragistics UltraNumericEditor (version 5.3, quite old) control on a form.</p> <p>If I set the .Value field to something less than .MinValue or something more than .MaxValue then I get a System.Exception thrown with the following message: </p> <blockquote> <p>The 'Value' property cannot be set to a value that is outside the range determined by the 'MinValue' and 'MaxValue' properties</p> </blockquote> <p>The signatures of the relevant fields on UltraNumericEditor are as follows:</p> <pre><code>public object MinValue { get; set; } public object MaxValue { get; set; } public object Value { get; set; } </code></pre> <p>This has potential to occur many hundreds of times through our codebase, so rather than check MinValue and MaxValue vs the value we're trying to set <em>every time</em>, I thought I'd subclass the control and put the check there:</p> <pre><code>public class OurNumericEditor : Infragistics.Win.UltraWinEditors.UltraNumericEditor { public object Value { get { return base.Value; } set { // make sure what we're setting isn't outside the min or max // if it is, set value to the min or max instead double min = (double)base.MinValue; double max = (double)base.MaxValue; double attempted = (double)value; if (attempted &gt; max) base.Value = max; else if (attempted &lt; min) base.Value = min; else base.Value = value; } } } </code></pre> <p>Clearly this works fine when the type of value, MinValue and MaxValue can be casted to doubles, but I would expect an InvalidCastException when that's not possible.</p> <p>Now I may just be having a blonde moment here but I think it should be possible to write a method that makes use of generics to do the comparison, but I'm struggling to visualise what that might look like.</p> <p>Any ideas or input at all?</p> <p>Thanks<br> Tom</p>
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