Question

I have this extension method:

public static string GetValueFor<TModel, TProperty>(this HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression)
{
    MemberExpression body = (MemberExpression)expression.Body;
    string propertyName = body.Member.Name;
    TModel model = helper.ViewData.Model;
    string value = typeof(TModel).GetProperty(propertyName).GetValue(model, null).ToString();
    return value;
}

It works very well for “one level” like this:

proj => proj.MyProperty

So it return a value for the MyProperty located under the model.

But it doesn’t work for “multi level” like this:

proj => proj.Level1.MyProperty

Here, trying to return a value for the MyProperty located under the model but we loose level1!

I don’t know if i’m clear?

Thanks.

Answer 1

You could use ModelMetadata.FromLambdaExpression method and inspect result’s Model property

ModelMetadata.FromLambdaExpression(expression, helper.ViewData).Model