通过反射访问属性

Question

如何使用反射访问CssStyleCollection类属性(最重要的是我感兴趣的键值集合)?

// this code runns inside class that inherited from WebControl
PropertyInfo[] properties = GetType().GetProperties();
//I'am not  able to do something like this
  foreach (PropertyInfo property in properties)
  {
     if(property.Name == "Style")
     {
        IEnumerable x = property.GetValue(this, null) as IEnumerable;
        ...
     }
  }

Answer 1

下面是通过反射获取Style属性的语法:

PropertyInfo property = GetType().GetProperty("Style");
CssStyleCollection styles = property.GetValue(this, null) as CssStyleCollection;
foreach (string key in styles.Keys)
{
    styles[key] = ?
}

注意CssStyleCollection没有实现IEnumerable(它实现了索引操作符)，所以你不能将它强制转换为IEnumerable。如果您想获得一个IEnumerable，您可以使用styles.Keys提取键和值:

IEnumerable<string> keys = styles.Keys.OfType<string>();
IEnumerable<KeyValuePair<string,string>> kvps 
    = keys.Select(key => new KeyValuePair<string,string>(key, styles[key]));