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POStoring a property of the type specified in a string
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  1. POStoring a property of the type specified in a string
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    copied!<p>There's an XML scheme which says something like this:</p> <pre><code>&lt;ExtraFields&gt; &lt;ExtraField Type="Int"&gt; &lt;Key&gt;Mileage&lt;/Key&gt; &lt;Value&gt;500000 &lt;/Value&gt; &lt;/ExtraField&gt; &lt;ExtraField Type="String"&gt; &lt;Key&gt;CarModel&lt;/Key&gt; &lt;Value&gt;BMW&lt;/Value&gt; &lt;/ExtraField&gt; &lt;ExtraField Type="Bool"&gt; &lt;Key&gt;HasAbs&lt;/Key&gt; &lt;Value&gt;True&lt;/Value&gt; &lt;/ExtraField&gt; &lt;/ExtraFields&gt; </code></pre> <p>I want to store this info in the class and I want its field to be of the specified type. I thought of a generic approach</p> <pre><code> static class Consts { public const string Int32Type = "int32"; public const string StringType = "string"; public const string BoolType = "bool"; } public class ExtraFieldValue&lt;TValue&gt; { public string Key; public TValue Value;public static ExtraFieldValue&lt;TValue&gt; CreateExtraField(string strType, string strValue, string strKey) { IDictionary&lt;string, Func&lt;string, object&gt;&gt; valueConvertors = new Dictionary&lt;string, Func&lt;string, object&gt;&gt; { { Consts.Int32Type, value =&gt; Convert.ToInt32(value)}, { Consts.StringType, value =&gt; Convert.ToString(value)}, { Consts.BoolType, value =&gt; Convert.ToBoolean(value)} }; if (!valueConvertors.ContainsKey(strType)) return null; ExtraFieldValue&lt;TValue&gt; result = new ExtraFieldValue&lt;TValue&gt; { Key = strKey, Value = (TValue)valueConvertors[strType](strValue) }; return result; } } </code></pre> <p>But the problem with this approach is that I need a list of ExtraFields and each of them can have different type in a list.</p> <p>I can only think of two options so far:</p> <p>1) using a dynamic keyword for this field but this approach seems to have limits</p> <p>2) using an object type for the field and casting its dynamic type to the necessary type. But anyhow if I will need some object specific calls, I will have to make a static cast.</p> <p>I would be glad to read your thoughts/proposals</p>
 

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