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POGet value of ConditionalAttribute at runtime using reflection
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copied!<p>I am working on a library that involves retrieving the methods of a given type. I have been using <code>Type.GetMethods</code>, but I've noticed an issue. Let's say that a method in the given type uses a <code>ConditionalAttribute</code>, and the value for this condition is false. GetMethods will still include this method, but I would like to ignore it.</p> <p>Here is a simple example of what I am attempting. This program is ran in Debug mode, so I want to find a way where only foo() and fooDebug() are called while fooBar() is ignored.</p> <pre><code>using System; using System.Diagnostics; using System.Reflection; namespace ConsoleApplication { class ClassA { public static void foo() { Console.WriteLine("foo"); } [Conditional("DEBUG")] public static void fooDebug() { Console.WriteLine("fooDebug"); } [Conditional("BAR")] public static void fooBar() { Console.WriteLine("fooBar"); } } class Program { //In this example, I want to find a way where only foo() and fooDebug() are called and fooBar() is ignored, when reflected. static void Main(string[] args) { //Call methods directly. //Methods are called/ignored as expected. ClassA.foo();//not ignored ClassA.fooDebug();//not ignored ClassA.fooBar();//ignored //Call methods with reflection MethodInfo[] methods = typeof(ClassA).GetMethods(BindingFlags.Static | BindingFlags.Public); foreach (MethodInfo method in methods) { //All methods are called, regardless of the ConditionalAttribute. method.Invoke(null, null); //I figured there would be some workaround like this: ConditionalAttribute conditional = Attribute.GetCustomAttribute(method, typeof(ConditionalAttribute)) as ConditionalAttribute; if (conditional == null) { //The method calls if it has no ConditionalAttribute method.Invoke(null, null); } else { //I can get the string of the condition; but I have no idea how, at runtime, to check if it's defined. string conditionString = conditional.ConditionString; //I also cannnot do a hardcoded (conditionString == "BAR") because the library would not know about BAR bool conditionIsTrue = true; //conditionIsTrue = ?? //If the method has a ConditionalAttribute, only call it if the condition is true if (conditionIsTrue) { method.Invoke(null, null); } } } } } } </code></pre> <p>Ultimately, I would like to know which methods do not include false ConditionalAttributes. </p> <p><strong>EDIT</strong></p> <p>This idea is for a library that others would use, so assume that ClassA is a type that they define and pass into my library.</p>

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