Visual C++ .NET/Collections/NameValueCollection

Adding value to NameValueCollection by indexer

<source lang="csharp">

1. include "stdafx.h"
2. using <system.dll>

using namespace System; using namespace System::Collections::Specialized; void main() {

   NameValueCollection^ nvCol = gcnew NameValueCollection();
   nvCol->Add(nullptr, "void");
   nvCol->Set("A", "a");
   nvCol->Add("B", "b1");
   nvCol->Add("B", "b2");
   nvCol->Add("B", "b3");
   nvCol->Add("C", "c1");
   nvCol->Add("C", "c2");
   nvCol->Add("C", "c3");
   array<String^>^ keys = nvCol->AllKeys;
   nvCol["F"] = "P";

}

 </source>

Add to NameValueCollection

<source lang="csharp">

1. include "stdafx.h"
2. using <system.dll>

using namespace System; using namespace System::Collections::Specialized; void main() {

   NameValueCollection^ nvCol = gcnew NameValueCollection();
   nvCol->Add(nullptr, "void");
   nvCol->Set("A", "a");
   nvCol->Add("B", "b1");
   nvCol->Add("B", "b2");
   nvCol->Add("B", "b3");
   nvCol->Add("C", "c1");
   nvCol->Add("C", "c2");
   nvCol->Add("C", "c3");

}

 </source>

Get all keys from NameValueCollection

<source lang="csharp">

1. include "stdafx.h"
2. using <system.dll>

using namespace System; using namespace System::Collections::Specialized; void main() {

   NameValueCollection^ nvCol = gcnew NameValueCollection();
   nvCol->Add(nullptr, "void");
   nvCol->Set("A", "a");
   nvCol->Add("B", "b1");
   nvCol->Add("B", "b2");
   nvCol->Add("B", "b3");
   nvCol->Add("C", "c1");
   nvCol->Add("C", "c2");
   nvCol->Add("C", "c3");
   array<String^>^ keys = nvCol->AllKeys;
   for (int i = 0; i < keys->Length; i++)
   {
       array<String^>^ vals = nvCol->GetValues(keys[i]);
       Console::WriteLine("{0}:\t\t{1}", keys[i], vals[0]);
       for (int j = 1; j < vals->Length; j++)
       {
           Console::WriteLine("\t\t{0}", vals[j]);
       }
   }

}

 </source>

Get key and value from a NameValueCollection

<source lang="csharp">

1. include "stdafx.h"
2. using <system.dll>

using namespace System; using namespace System::Collections::Specialized; void main() {

   NameValueCollection^ nvCol = gcnew NameValueCollection();
   nvCol->Add(nullptr, "void");
   nvCol->Set("A", "a");
   nvCol->Add("B", "b1");
   nvCol->Add("B", "b2");
   nvCol->Add("B", "b3");
   nvCol->Add("C", "c1");
   nvCol->Add("C", "c2");
   nvCol->Add("C", "c3");
   array<String^>^ keys = nvCol->AllKeys;

   Console::WriteLine("Key @[1]:\t{0}", nvCol->GetKey(1));
   Console::WriteLine("Values @[3]:\t{0}", nvCol[3]);

}

 </source>

Get values by key in NameValueCollection

<source lang="csharp">

1. include "stdafx.h"
2. using <system.dll>

using namespace System; using namespace System::Collections::Specialized; void main() {

   NameValueCollection^ nvCol = gcnew NameValueCollection();
   nvCol->Add(nullptr, "void");
   nvCol->Set("A", "a");
   nvCol->Add("B", "b1");
   nvCol->Add("B", "b2");
   nvCol->Add("B", "b3");
   nvCol->Add("C", "c1");
   nvCol->Add("C", "c2");
   nvCol->Add("C", "c3");
   array<String^>^ keys = nvCol->AllKeys;
   for (int i = 0; i < keys->Length; i++)
   {
       array<String^>^ vals = nvCol->GetValues(keys[i]);
       Console::WriteLine("{0}:\t\t{1}", keys[i], vals[0]);
       for (int j = 1; j < vals->Length; j++)
       {
           Console::WriteLine("\t\t{0}", vals[j]);
       }
   }

}

 </source>

Remove by key

<source lang="csharp">

1. include "stdafx.h"
2. using <system.dll>

using namespace System; using namespace System::Collections::Specialized; void main() {

   NameValueCollection^ nvCol = gcnew NameValueCollection();
   nvCol->Add(nullptr, "void");
   nvCol->Set("A", "a");
   nvCol->Add("B", "b1");
   nvCol->Add("B", "b2");
   nvCol->Add("B", "b3");
   nvCol->Add("C", "c1");
   nvCol->Add("C", "c2");
   nvCol->Add("C", "c3");
   array<String^>^ keys = nvCol->AllKeys;
   nvCol->Remove(nullptr);

}

 </source>