CODEWITHSUNDEEP
c#anonymous-typesnamevaluecollection
Frank Schwieterman
Frank Schwieterman

Reputation: 24478

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

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;

Upvotes: 15

Views: 6576

Answers (4)

Yuriy Faktorovich
Yuriy Faktorovich

Reputation: 68737

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()));

Upvotes: 29

Psychic Rush
Psychic Rush

Reputation: 390

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()));

Upvotes: 1

LukeH
LukeH

Reputation: 269578

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()));

Upvotes: 5

Scott Weinstein
Scott Weinstein

Reputation: 19117

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());
}

Upvotes: 3

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