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POHow to make/design a class which can have different type of members at runtime in C#
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  1. POHow to make/design a class which can have different type of members at runtime in C#
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    copied!<p>I have a situation where I need a class which need to contain information about something which varies at runtime, for example:</p> <pre><code>class Info&lt;T&gt; { public T Max { get; set; } public T Min { get; set; } public T DefaultValue { get; set; } public T Step { get; set; } // Some other stuff } </code></pre> <p>I have to store many instances of this class in a dictionary but problem is that to use dictionary I have to declare one type e.g.</p> <pre><code>Dictionary&lt;string, Info&lt;int&gt;&gt; dict = new Dictionary&lt;string, Info&lt;int&gt;&gt;(); </code></pre> <p>In this case I can't add another type of info e.g. <code>Info&lt;double&gt;</code>. I want something like , I have removed generic version in below case.</p> <pre><code> {"Price", new Info{Min=100,Max=1000,DefaultValue=200,Step=50}} {"Adv", new Info{Min=10.50,Max=500.50,DefaultValue=20.50,Step=1.5}} {"Answer", new Info{Min=false,Max=false,DefaultValue=false,Step=false}} </code></pre> <p>I can use <code>Dictionary&lt;string, Object&gt; dict = new Dictionary&lt;string, Object&gt;();</code></p> <p>but then when I get the dict item back I don't know what type is that, I need to know the type as well e.g. for <code>Price</code> it's int and for Adv it's double , how will I know it at runtime?</p> <p>Actually I want to create a validator(I am using .Net Compact Framework 3.5/can not use any inbuilt system if it exists) for example If I have a class like below..</p> <pre><code>class Demo { public int Price { get; set; } public float Adv { get; set; } public static bool Validate(Demo d) { List&lt;string&gt; err = new List&lt;string&gt;(); // here I have to get Info about the Price // from dictionary, it can be any storage Info priceInfo = GetPriceInfo("Price"); if (d.Price &lt; priceInfo.Min) { d.Price = priceInfo.Min; err.Add("price is lower than Min Price"); } if (d.Price &gt; priceInfo.Max) { d.Price = priceInfo.Max; err.Add("price is above than Max Price"); } // need to do similar for all kinds of properties in the class } } </code></pre> <p>So idea is to store validation information at one place (in dictionary or somewhere else) and then use that info at validation time, I also would like to know if I can design the above scenario in a better way ?</p> <p>Maybe there is a better way to do this , any guidelines please?</p>
 

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