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POMultidimensional dictionary with "add new value if key not in dictionary"
 

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  1. POMultidimensional dictionary with "add new value if key not in dictionary"
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    <p>There were similar questions on SO, but none of them answered my question.</p> <p>I want to have two dimensional dictionary for translation. Something like this:</p> <pre><code>Dictionary["DE"][TranslationKeys.Title] = "Title in German"; Dictionary["DE"][TranslationKeys.SubTitle] = "Subtitle in German"; Dictionary["PL"][TranslationKeys.Title] = "Title in Polish"; Dictionary["PL"][TranslationKeys.SubTitle] = "Subtitle in Polish"; Dictionary["EN"][TranslationKeys.Title] = "Title in English"; Dictionary["EN"][TranslationKeys.SubTitle] = "Subtitle in English"; </code></pre> <p>which is OK if i use traditional dictionary like <code>Dictionary&lt;string,Dictionary&lt;TranslationKeys,string&gt;&gt;</code></p> <p>But i <strong>don't</strong> want to initialize it in "ugly" way like this:</p> <pre><code>Dictionary = new Dictionary&lt;string,Dictionary&lt;TranslationKeys,string&gt;&gt;(){ {"PL",new Dictionary&lt;TranslationKeys,string&gt;(){{TranslationKeys.SubTitle,"Subtitle in Polish"}}} }; </code></pre> <p>but like this:</p> <pre><code>Dictionary["PL"][TranslationKeys.SubTitle] = "Subtitle in Polish"; </code></pre> <p>So I've tried to implement an "intelligent" multidimensional dictionary that would figure out itself if he got the value or not. What I've done this far is a new generic class that uses Dictionary and special indexer:</p> <pre><code>public class TranslateDictionary&lt;TKey, TValue&gt; where TValue : new() { private Dictionary&lt;TKey, TValue&gt; Dictionary; public TValue this[TKey lang] { get { if (!Dictionary.ContainsKey(lang)) { TValue obj = new TValue(); Dictionary.Add(lang, new TValue()); } return Dictionary[lang]; } set { Dictionary[lang] = value; } } } </code></pre> <p>But now i'm stuck... Because i'm using strings in my generic typed TranslateDictionary i'm gettint this error:</p> <blockquote> <p>Error 2 'string' must be a non-abstract type with a public parameterless constructor in order to use it as parameter 'TValue' in the generic type or method 'Resources.TranslateDictionary' </p> </blockquote> <p>Allthough compiler doesn't complain about initialization like this:</p> <pre><code>Dictionary["EN"][TranslationKeys.Title] = "Title in English"; </code></pre> <p>Maybe i should use other type of collection instead of Dictionary that i'm not aware of, to solve my problem? </p>
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    1. USTomasz Sikora
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    1. COlook at this: http://stackoverflow.com/a/9303961/440030
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      1. USReza ArabQaeni
    2. COYou know you set a temporary TValue and then never use it right?..
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      1. USSayse
 

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