将字典添加到另一个字典C#
是否可以将一个将字典添加到另一个字典C#,c#,.net,data-structures,C#,.net,Data Structures,是否可以将一个字典添加到另一个包含不同字典值的字典 Dictionary<String, Func<String>> d1 = new Dictionary<String,Func<String>>(); Dictionary<String, Func<String,String>> d2 = new Dictionary<String, Func<String,String>>(); Diction
字典
添加到另一个包含不同字典值的字典
Dictionary<String, Func<String>> d1 = new Dictionary<String,Func<String>>();
Dictionary<String, Func<String,String>> d2 = new Dictionary<String, Func<String,String>>();
Dictionary<String, Dictionary> dHolder = new Dictionary<String, Dictionary>();
dHolder.add("key",d1);
dHolder.add("key",d2);
Dictionary d1=新字典();
字典d2=新字典();
Dictionary dHolder=新字典();
d.添加(“键”,d1);
添加(“键”,d2);
如果使用IDictionary
接口,则可以执行此操作,所有字典(无论使用何种类型参数)都从该接口继承
Dictionary<String, Func<String>> d1 = new Dictionary<String,Func<String>>();
Dictionary<String, Func<String,String>> d2 = new Dictionary<String, Func<String,String>>();
Dictionary<String, IDictionary> dHolder = new Dictionary<String, IDictionary>();
dHolder.Add("key1", d1);
dHolder.Add("key2", d2);
Dictionary d1=新字典();
字典d2=新字典();
Dictionary dHolder=新字典();
d.添加(“键1”,d1);
添加(“键2”,d2);
但是,在检索这些值时,您需要经历取消绑定这些值的痛苦。您可以,但不完全是您编写的方式
var dict1 = new Dictionary<string, ObjectTypeA>();
var dict2 = new Dictionary<string, ObjectTypeB>();
var holder = new Dictionary<string, IDictionary>();
holder["key1"] = dict1;
holder["key2"] = dict2;
一种方法是将
dHolder
的TValue设置为对象
,然后在检索后将其转换为相关类型
Dictionary<String, Func<String>> d1 = new Dictionary<String, Func<String>>();
Dictionary<String, Func<String, String>> d2 = new Dictionary<String, Func<String, String>>();
Dictionary<String, Object> dHolder = new Dictionary<String, Object>();
dHolder.Add("key1", d1);
dHolder.Add("key2", d2);
Dictionary<String, Func<String>> val1 = dHolder["key1"] as Dictionary<String, Func<String>>;
Dictionary<String, Func<String, String>> val2 = dHolder["key2"] as Dictionary<String, Func<String, String>>;
Dictionary d1=新字典();
字典d2=新字典();
Dictionary dHolder=新字典();
d.添加(“键1”,d1);
添加(“键2”,d2);
Dictionary val1=dHolder[“key1”]作为字典;
Dictionary val2=dHolder[“key2”]作为字典;
备注:
如果强制转换失败,运算符返回as
null
- 您还可以使用字典的
方法通过其键安全地检索值TryGetValue
holder["key1"]["newKey"] = new ObjectTypeA(); //Works
holder["key1"]["newKey2"] = new ObjectTypeB(); //Runtime exception
Dictionary<String, Func<String>> d1 = new Dictionary<String, Func<String>>();
Dictionary<String, Func<String, String>> d2 = new Dictionary<String, Func<String, String>>();
Dictionary<String, Object> dHolder = new Dictionary<String, Object>();
dHolder.Add("key1", d1);
dHolder.Add("key2", d2);
Dictionary<String, Func<String>> val1 = dHolder["key1"] as Dictionary<String, Func<String>>;
Dictionary<String, Func<String, String>> val2 = dHolder["key2"] as Dictionary<String, Func<String, String>>;