What are the use cases for this static reflection code?
- by Maslow
This is Oliver Hanappi's static reflection code he posted on stackoverflow
private static string GetMemberName(Expression expression)
{
switch (expression.NodeType)
{
case ExpressionType.MemberAccess:
var memberExpression = (MemberExpression)expression;
var supername = GetMemberName(memberExpression.Expression);
if (String.IsNullOrEmpty(supername))
return memberExpression.Member.Name;
return String.Concat(supername, '.', memberExpression.Member.Name);
case ExpressionType.Call:
var callExpression = (MethodCallExpression)expression;
return callExpression.Method.Name;
case ExpressionType.Convert:
var unaryExpression = (UnaryExpression)expression;
return GetMemberName(unaryExpression.Operand);
case ExpressionType.Parameter:
return String.Empty;
default:
throw new ArgumentException("The expression is not a member access or method call expression");
}
}
I have the public wrapper methods:
public static string Name<T>(Expression<Action<T>> expression)
{
return GetMemberName(expression.Body);
}
public static string Name<T>(Expression<Func<T, object>> expression)
{
return GetMemberName(expression.Body);
}
then added my own method shortcuts
public static string ClassMemberName<T>(this T sourceType,Expression<Func<T,object>> expression)
{
return GetMemberName(expression.Body);
}
public static string TMemberName<T>(this IEnumerable<T> sourceList, Expression<Func<T,object>> expression)
{
return GetMemberName(expression.Body);
}
What are examples of code that would necessitate or take advantage of the different branches in the GetMemberName(Expression expression) switch? what all is this code capable of making strongly typed?
