list of type dictionary

Question

0.00/5 (No votes)

See more:

hi,
I want to create list of type dictionary and i have to retrive/read the data from that list(dictionary type) by using key
ex:

C#

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        // Populate example Dictionary
        var dict = new Dictionary<string,string>();
        dict.Add("name", "dinakar");
        dict.Add("city", "delhi");

        // Get a List of all the Keys
        List<string> keys = new List<string>(dict.Keys);
    }
}

please how tell me how to read values from List<dict> by comparing key=value format.
please help me out

Posted 20-Jul-11 6:56am

Member 7962316

Updated 20-Jul-11 7:17am

#realJSOP

v3

Add a Solution

Comments

Sergey Alexandrovich Kryukov 21-Jul-11 11:17am

Not clear what you want to achieve and why.
--SA

4 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

#realJSOP · Answer 1 · 2011-07-20T07:24:00

Solution 4

According to your question, this is what I recommend:

List<string> keylist = new List<string>();
foreach (Dict<string, string> dict in list)
{
    keyList.AddRange(dict.Keys);
}

However, what you want to do makes no sense because even though you now have a list of keys from the dictionaries in your list, you no longer know which dict object contains a given key. Further, how do you propose to handle the possibility of multiple keys with the same name from different dict objects?

Posted 20-Jul-11 7:24am

#realJSOP

Updated 21-Jul-11 1:43am

v4

Comments

DominicZA 20-Jul-11 13:29pm

Yip, which is exactly why I proposed my solution!

#realJSOP 20-Jul-11 18:11pm

*According to his question* that's not what he wants. He said he wanted all of the keys in all of the dictionaries in his list of dictionaries.

fcronin 20-Jul-11 14:21pm

My 5... dominic, you don't take into account any of what John says here...the issue is, the OP appears to be viewing his requirements in the wrong light, as the dictionary does not seem to be utilized properly in his case. If name and city are properties of an object, he would be better off either using a List<object> (where object has properties of name, city, etc), or using a Dictionary<string, object=""> if he wants to key off of a unique value for each entity.

fcronin 20-Jul-11 14:22pm

(the word 'object' got scrubbed from Dictionary<> in my last comment...)

DominicZA · Answer 2 · 2011-07-20T07:14:00

Solution 1

From what I can tell from your code, the list shouldnt be necessary.

public string GetMyValue(string key)
{
if (dict.ContainsKey(key))
    return dict[key];
else
    return null; 
}

Posted 20-Jul-11 7:14am

DominicZA

Updated 20-Jul-11 7:16am

v2

Abhinav S · Answer 3 · 2011-07-20T07:16:00

Solution 2

Try

C#

foreach( KeyValuePair<string, string> kvp in dict )
{
keys.add(kvp.key);
}

Posted 20-Jul-11 7:16am

Abhinav S

Comments

DominicZA 20-Jul-11 13:18pm

Im not 100% sure about what this guys is trying to achieve, but if he wanted to populate the List with the keys couldnt he just say keys = dict.keys.ToList();
Kind of like he has done?

Espen Harlinn · Answer 4 · 2011-07-20T07:18:00

Solution 3

Take a look at the public TValue this[TKey key] property http://msdn.microsoft.com/en-us/library/9tee9ht2.aspx[^]

string value = dict[keys[0]];

Gets you the value of the first key ...

Regards
Espen Harlinn

Posted 20-Jul-11 7:18am

Espen Harlinn