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Categories / C# / Reflection

 

Type Manager

using System; using System.Diagnostics.CodeAnalysis; using System.Linq.Expressions; using System.Reflection; namespace AutoLoL.Logic.Utils {     public static class TypeManager     {         [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]         public static PropertyInfo GetProperty<TType>(Expression<Func<TType, object>> propertySelector)         {             Expression expression = propertySelector.Body;             // If the Property returns a ValueType then a Convert is required => Remove it             if (expression.NodeType == ExpressionType.Convert || expression.NodeType == ExpressionType.ConvertChecked)             {                 expression = ((UnaryExpression)expression).Operand;             }             // If this isn't a member access expression then the expression isn't valid             MemberExpression memberExpression = expression as MemberExpression;             if (memberExpression == null)             {                 ThrowExpressionArgumentException("propertySelector");             }             expression = memberExpression.Expression;             // If the Property returns a ValueType then a Convert is required => Remove it             if (expression.NodeType == ExpressionType.Convert || expression.NodeType == ExpressionType.ConvertChecked)             {                 expression = ((UnaryExpression)expression).Operand;             }             // Check if the expression is the parameter itself             if (expression.NodeType != ExpressionType.Parameter)             {                 ThrowExpressionArgumentException("propertySelector");             }             // Finally retrieve the MemberInfo             PropertyInfo propertyInfo = memberExpression.Member as PropertyInfo;             if (propertyInfo == null)             {                 ThrowExpressionArgumentException("propertySelector");             }             return propertyInfo;         }         private static void ThrowExpressionArgumentException(string argumentName)         {             throw new ArgumentException("It's just the simple expression 'x => x.Property' allowed.", argumentName);         }     } }