how to initialize NameValueCollection with inner NameValueCollection

Question

After I tried to initialize a NameValueCollection with an inner NameValueCollection, the c# compiler says that has to be NameValueCollection(string,string).

As I thought when I call the Add function when I initialize like this.

• void Add(NameValueCollection c);
• void Add(string name, string value);

Is there any other approach that I can initialize the same on one line, based on NameValueCollection?

The reason is that I have to POST data to an HTTPAddress and I use this function

Here is my example which won't worked:

NameValueCollection data = new NameValueCollection()
{
   { "key1", "value1"},
   { "key2", new NameValueCollection()
   {
       { "key2sub", "value"}
   }
};

Answer 1

Not really.The UploadValues(..) method take a NameValueCollection, and a NameValueCollection only accepts string.

The aim of the method is to transform your data...

UploadValues("http://www.example.com/", new NameValueCollection()
{
   { "key1", "value1" },
   { "key2", "value2" }
};

... into the URL:

http://www.example.com/?key1=value1&key2=value2

If you want to send more information, you can put a delimited string as the value for one of your keys, and then split it apart again at the other end.

UploadValues("http://www.example.com/", new NameValueCollection()
{
   { "key1", "value1" },
   { "key2", "value2,value3,value4" }
};

Which should produce something like:

http://www.example.com/?key1=value1&key2=value2,value3,value4

But the best solution is as @hmnzr said in their answer (now-deleted), to avoid NameValueCollection entirely and upload a custom object serialized as JSON using the UploadString(..) method.