CssStyleCollection類：通過反射訪問屬性

Question

如何使用反射訪問CssStyleCollection類屬性（最重要的是我感興趣的是它的鍵值集合）？

// 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

下面是通過反射得到Style屬性的語法：

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

注意CssStyleCollection不實現IEnumerable（它實現了索引運算符），所以你不能把它轉換到。如果你想獲得一個IEnumerable，你可以提取使用styles.Keys值的鍵，並且：

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