Question

I am trying to generate a form at run-time. I have ended up with this approach

@using (Html.BeginForm()) {
    @foreach (var propertyInfo in typeof(MvcApplication1.Models.LogOnModel).GetProperties()) {
        if (propertyInfo.PropertyType == typeof(Boolean)) {
            Html.CheckBoxFor(m => new PropertyWrapper<Boolean>(propertyInfo, Model).Property);
        }
        else if (propertyInfo.PropertyType == typeof(String)) {
            Html.TextBoxFor(m => new PropertyWrapper<String>(propertyInfo, Model).Property);
        }
        ...
    }
}

With this class to allow the [ElementType]For() methods to work (they need a reference to a property which can’t be retrieved using reflection).

public class PropertyWrapper<T> {
    private PropertyInfo _propertyInfo;
    private Object _instance;

    public PropertyWrapper(PropertyInfo propertyInfo, Object instance) {
        _propertyInfo = propertyInfo;
        _instance = instance;
    }

    public T Property {
        get { return (T)_propertyInfo.GetValue(_instance, null); }
        set { _propertyInfo.SetValue(_instance, value, null); }
    }
}

I get the following error

System.Reflection.TargetException: Non-static method requires a target.

because instance parameter of PropertyWrapper constructor is null. Am I missing something? Is this even possible?

Answer 1

Why not use the non “for” methods? @Html.CheckBox() for example. Just pass the name of the property to the method, and model binding will still work after postback