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POAlternative for switch that only calls methods based on cases values
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  1. POAlternative for switch that only calls methods based on cases values
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    copied!<p>Is there a possible way to write the next switch in some shorter, readable code?</p> <pre><code>switch (SomeValue) { case "001": return DoMethod1(); break; case "002": return DoMethod2(); break; //etc.. } </code></pre> <p>I was thinking in some way like </p> <pre><code>Dictionary&lt;string, Func&lt;int&gt;&gt; MethodsByValue = new Dictionary&lt;string, Func&lt;int&gt;&gt;() { { "001", DoMethod1 }, { "002", DoMethod2 }, } </code></pre> <p>and call this by doing</p> <pre><code>return MethodsByValue[SomeValue](); </code></pre> <p>But is this even possible? Or am I thinking way to far out of the box. I couldn't find anyting like this but then again, I don't know the keywords for this if it is possible.</p> <p>EDIT: To answer the request of Lasse V. Karlsen:</p> <p>This is how the code is in my project. Changed names at some places cause original names doesn't matter cause it is in my mother language.</p> <pre><code>public string GetRecord420(Dictionary&lt;DataClass, object&gt; dictionaryName) { // some code here } public string GetRecord421(Dictionary&lt;DataClass, object&gt; dictionaryName) { // some code here } //(Temperary) solution with the switch statement in a wrapper: public string GetRecordByString(string s, Dictionary&lt;DataClass, object&gt; dictionaryName) { switch (s) { case "320": return GetRecord420(dictionaryName); case "321": return GetRecord421(dictionaryName); default: return String.Empty; } } //How I hoped it could be, with a mapping dictionary. public Dictionary&lt;string, Func&lt;string, Dictionary&lt;DataClass, object&gt;&gt;&gt; MethodByString = new Dictionary&lt;string, Func&lt;string, Dictionary&lt;DataClass, object&gt;&gt;&gt;() { { "320", GetRecord420 }, { "321", GetRecord421 }, } </code></pre> <p>DataClass is an Entity class, which stores some column data (column name, column type, etc.).</p> <p>I tried the dictionary part, but it gives me the error: Cannot convert from method group to System.Func&lt;...>. </p> <p>Changing to () => GetRecord420 gives me the error: Cannot convert lambda to delegate type System.Func&lt;...> because some of the return types in the block are not implicitly convertible to the delegate return type.</p>
 

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