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   Home » Visual C++ » Usage of Dictionary along with KeyPairValue
       
Author Reply
Karthik Agarwal
posted 317 posts
since Nov 30, 2010 
from Chennai

Usage of Dictionary along with KeyPairValue

  Posted on: 18 Aug 2011       
HI,

I have a dictionary declared as follows:

public:    
     static Dictionary<String ^, List<String ^>^> ^ language_string_table;

so by using for each loop key and values are loaded into that (which is written by someone else). Now i need by using the same for each loop i am able to access "key" of the Dictionary alone, please help me out how to access "value" of the Dictionary.

Thanks & Regards,
P.Karthik
Vulpes
posted  5113 posts
since  Feb 28, 2011 
from 

 Re: Usage of Dictionary along with KeyPairValue
  Posted on: 18 Aug 2011   Accepted Answer     11  
As it's not usually obvious how to translate C# code to C++/CLI, try this:

#include "stdafx.h"

using namespace System;
using namespace System::Collections::Generic;

ref class MyClass
{
   public:     
     static Dictionary<String ^, List<String ^>^> ^ language_string_table;

     static void MyMethod()
     {
        language_string_table = gcnew Dictionary<String ^, List<String ^>^>();
        List<String ^>^ list1 = gcnew List<String ^>();
        list1->Add("oui");
        list1->Add("non");
        language_string_table->Add("French", list1);
        List<String ^>^ list2 = gcnew List<String ^>();
        list2->Add("yes");
        list2->Add("no");
        language_string_table->Add("English", list2);
        for each(String ^ key in language_string_table->Keys)
        {
           List<String ^>^ values = language_string_table[key];
           for each(String ^ value in values)
           {
              Console::Write("{0} ", value);
           }
           Console::WriteLine();
        }
     }
};

int main(array<System::String ^> ^args)
{
    MyClass::MyMethod();
    Console::ReadKey();
    return 0;
Karthik Agarwal
posted  317 posts
since  Nov 30, 2010 
from  Chennai

 Re: Usage of Dictionary along with KeyPairValue
  Posted on: 18 Aug 2011        0  
Hi,

No this doesn't give the exact values of the key. This might work for the Dictionary which contains two Strings but my Dictionary contains one string and one list so if i use kvp.Value[0] and[1] it is giving the values of the 1st key by default based on the index provided.

If you can tell me a way where i can get whole list of a key. That is also fine. I can fetch data from that.

Thanks & Regards,
P.Karthik
Vulpes
posted  5113 posts
since  Feb 28, 2011 
from 

 Re: Usage of Dictionary along with KeyPairValue
  Posted on: 18 Aug 2011        11  
I didn't really follow that but, if you want to do it using KeyValuePairs rather than the Keys collection, then use:

for each(KeyValuePair<String ^, List<String ^>^> kvp in language_string_table)
{
    List<String ^> ^ values = kvp.Value;
    for each(String ^ value in values)
    {
        Console::Write("{0} ", value);
    }
    Console::WriteLine();

       
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