Whats the best approach for getting the attribute values from a classes methods and from the interface methods when the methods are overloaded?
For example I would want to know that in the following example the Get method with one parameter has the two attributes and the values are 5 and "any" while the other method has attributes with values 7 and "private".
public class ScopeAttribute : System.Attribute
{
public string Allowed { get; set; }
}
public class SizeAttribute : System.Attribute
{
public int Max { get; set; }
}
public interface Interface1
{
[SizeAttribute( Max = 5 )]
string Get( string name );
[SizeAttribute( Max = 7 )]
string Get( string name, string area );
}
public class Class1 : Interface1
{
[ScopeAttribute( Allowed = "any" )]
public string Get( string name )
{
return string.Empty;
}
[ScopeAttribute( Allowed = "private" )]
public string Get( string name, string area )
{
return string.Empty;
}
}
The only way I found was to check what interfaces the class implements and check attributes of the properties (if any exist) on those interfaces:
static bool HasAttribute (PropertyInfo property, string attribute) {
if (property == null)
return false;
if (GetCustomAttributes ().Any (a => a.GetType ().Name == attribute))
return true;
var interfaces = property.DeclaringType.GetInterfaces ();
for (int i = 0; i < interfaces.Length; i++)
if (HasAttribute (interfaces[i].GetProperty (property.Name), attribute))
return true;
return false;
}
You can probably adopt it to methods equally easy.
Note: overall approach is tested but the code itself is ad-hoc and may not compile.
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