Upgrading to ASP.NET MVC 2 - formCollection.ToValueProvider()

Question

I am getting the following error:

Cannot implicitly convert type IValueProvider to IDictionary

When I try to run the code below:

IDictionary<string, ValueProviderResult> valueProvider = formValues.ToValueProvider();
foreach (string k in formValues.Keys)
{
    ModelState.SetModelValue(k, valueProvider[k]);
}

Can anyone help?

Answer 1

You do second, superfluous dictionary lookup:

foreach (KeyValuePair<string, ValueProviderResult> pair in formValues)
{
    ModelState.SetModelValue(pair.Key, pair.Value);
}

Very strange!

in 3.5 ToValueProvider() returns IDictionary<string, ValueProviderResult>

and

but in 4.0 - it returns IValueProvider

Answer 2

As I am using .NET 4.0 I had to do this:

IValueProvider valueProvider = formValues.ToValueProvider();
foreach (string k in formValues.Keys)
{
    ModelState.SetModelValue(k, valueProvider.GetValue(k));
} 

I want to say thanks to @abatishchev for pointing out the differences.