Attribute zur Laufzeit abfragen

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

  internal class AttributeLogic
    {
        internal static readonly AttributeLogic Instance = new AttributeLogic();

        internal string GetAttributeValue(Type targetType, Type attributeType, string attributePropertyName)
        {
            if (Attribute.IsDefined(targetType, attributeType))
            {
                Object att = Attribute.GetCustomAttribute(targetType, attributeType);
                PropertyInfo pi = att.GetType().GetProperty(attributePropertyName);
                if (pi == null)
                {
                    throw new Exception(String.Format("The {0} attribute on the {1} type dosen't define the {2} property",
                        new object[] { attributeType, targetType, attributePropertyName }));
                }
                else
                {
                    return pi.GetValue(att, null).ToString();
                }
            }
            else
            {
                throw new Exception(String.Format("The {0} attribute isn't set to the type {1}", new object[] { attributeType, targetType }));
            }
        }

        internal bool isAttributeTrue(Type targetType, Type attributeType, string attributePropertyName)
        {
            if (Attribute.IsDefined(targetType, attributeType))
            {
                Object att = Attribute.GetCustomAttribute(targetType, attributeType);
                PropertyInfo pi = att.GetType().GetProperty(attributePropertyName);
                if (pi == null)
                {
                    return false;
                }
                else
                {
                    return Convert.ToBoolean(pi.GetValue(att, null));
                }
            }
            else
            {
                return false;
            }
        }
    }