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POIValidatableObject and Nullable value types
 

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    <p>I have a struct that implements IValidatableObject, which I use for properties on a view model. The validation works fine with non-nullable properties, but if add a property of type Nullable<code>&lt;MyStruct</code>> the IValidatableObject.Validate method is never called for that property, even if it has a value.</p> <p>Is there any way that I trigger the validation on my nullable properties too, or is IValidatableObject not intended to be used with value types?</p> <p>Thanks</p> <hr> <p>Additional information:</p> <p>I wanted to be able to specify units when entering data in my form, e.g. 10m, 100km, 1cm etc. I also wanted to validate that the entered data was within range and of a correct format. My struct converts the string with potentially different units (100cm/100m/1km) into a decimal property which always has the same unit (1/100/1000) and vice-versa.</p> <p>I used IValidatableObject for validation because the validation will always be the same for any instance of MyStruct - I didn't want to add an attribute each time it is used.</p> <p>My model would look something like this: </p> <pre><code>public class MyModel { public MyStruct Ab {get; set;} public MyStruct? Cd {get; set;} } </code></pre> <p>My view is a strongly typed view using the model, which renders my struct as a text box using a display template. When the form is posted, I have a custom model binder to convert the entered string back to my struct. </p> <p>My controller action looks like:</p> <pre><code>public ActionResult MyAction(MyModel model) { //do stuff } </code></pre> <p>The model is bound ok for properties of type MyStruct and Nullable<code>&lt;MyStruct</code>>.</p>
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    1. USDan
    1. USDan
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    1. COCould you show us the code you have so far for your model, controller and view?
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      1. USDarin Dimitrov
    2. COI've updated the question with more information
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      1. USDan
 

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