how to convert an instance of an anonymous type to a NameValueCollection

问题

Suppose I have an anonymous class instance

var foo = new { A = 1, B = 2};

Is there a quick way to generate a NameValueCollection? I would like to achieve the same result as the code below, without knowing the anonymous type's properties in advance.

NameValueCollection formFields = new NameValueCollection();
formFields["A"] = 1;
formFields["B"] = 2;

回答1:

var foo = new { A = 1, B = 2 };

NameValueCollection formFields = new NameValueCollection();

foo.GetType().GetProperties()
    .ToList()
    .ForEach(pi => formFields.Add(pi.Name, pi.GetValue(foo, null).ToString()));

回答2:

Another (minor) variation, using the static Array.ForEach method to loop through the properties...

var foo = new { A = 1, B = 2 };

var formFields = new NameValueCollection();
Array.ForEach(foo.GetType().GetProperties(),
    pi => formFields.Add(pi.Name, pi.GetValue(foo, null).ToString()));

回答3:

Just about what you want:

Dictionary<string, object> dict = 
       foo.GetType()
          .GetProperties()
          .ToDictionary(pi => pi.Name, pi => pi.GetValue(foo, null));

NameValueCollection nvc = new NameValueCollection();
foreach (KeyValuePair<string, object> item in dict)
{
   nvc.Add(item.Key, item.Value.ToString());
}

回答4:

I like the answer Yurity gave with one minor tweak to check for nulls.

var foo = new { A = 1, B = 2 };

NameValueCollection formFields = new NameValueCollection();

foo.GetType().GetProperties()
 .ToList()
 .ForEach(pi => formFields.Add(pi.Name, (pi.GetValue(foo, null) ?? "").ToString()));

来源：https://stackoverflow.com/questions/2838398/how-to-convert-an-instance-of-an-anonymous-type-to-a-namevaluecollection

标签

anonymous-types