C# 嵌套字典
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C# nested dictionaries
提问by user1898657
What is wrong with my syntax? I want to be able to get the value "Genesis" with this info["Gen"]["name"]
我的语法有什么问题？我希望能够通过这个获得“Genesis”的价值info["Gen"]["name"]
public var info = new Dictionary<string, Dictionary<string, string>> {
{"Gen", new Dictionary<string, string> {
{"name", "Genesis"},
{"chapters", "50"},
{"before", ""},
{"after", "Exod"}
}},
{"Exod", new Dictionary<string, string> {
{"name", "Exodus"},
{"chapters", "40"},
{"before", "Gen"},
{"after", "Lev"}
}}};
采纳答案by Mohammad Dehghan
You cannot define a class field using var.
您不能使用 定义类字段var。
Change varto Dictionary<string, Dictionary<string, string>>:
更改var为Dictionary<string, Dictionary<string, string>>：
public Dictionary<string, Dictionary<string, string>> info =
new Dictionary<string, Dictionary<string, string>>
{
{
"Gen",
new Dictionary<string, string>
{
{"name", "Genesis"},
{"chapters", "50"},
{"before", ""},
{"after", "Exod"}
}
},
{
"Exod",
new Dictionary<string, string>
{
{"name", "Exodus"},
{"chapters", "40"},
{"before", "Gen"},
{"after", "Lev"}
}
}
};
See herefor more information about varkeyword and its usage.
有关关键字及其用法的更多信息，请参见此处var。
回答by Soner G?nül
From MSDN;
来自MSDN;
var can only be used when a local variable is declared and initialized in the same statement; the variable cannot be initialized to null, or to a method group or an anonymous function.
var cannot be used on fields at class scope.
Variables declared by using var cannot be used in the initialization expression.
var 只能在同一个语句中声明和初始化局部变量时使用；该变量不能初始化为 null，也不能初始化为方法组或匿名函数。
var 不能用于类范围内的字段。
使用 var 声明的变量不能在初始化表达式中使用。
Just change your varto Dictionary<string, Dictionary<string, string>>. Like;
只需将您的更改var为Dictionary<string, Dictionary<string, string>>. 喜欢;
public Dictionary<string, Dictionary<string, string>> info =
new Dictionary<string, Dictionary<string, string>>{}
