C# 设置键/值对
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Setting Key/Value Pairs
提问by James Jeffery
I've created a List as a property of the class, and want to set the Key/Value pairs when defining the List. I was originally using a structure but realized it's probably not the ideal solution so I changed it to a List. The problem is I'm getting an error with the syntax.
我已经创建了一个列表作为类的属性，并希望在定义列表时设置键/值对。我最初使用的是一个结构，但意识到它可能不是理想的解决方案，所以我将其更改为 List。问题是我遇到了语法错误。
Any ideas?
有任何想法吗？
private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>[]
{
new KeyValuePair<String, String>("lsd",""),
new KeyValuePair<String, String>("charset", "")
};
采纳答案by Steve
Probably I'm missing something, but I would have used a Dictionary instead of
So simple....
可能我遗漏了一些东西，但我会使用字典而不是
那么简单......
Dictionary<string, string>formData = new Dictionary<string, string>
{
{"lsd", "first"},
{"charset", "second"}
};
and then use it in these ways:
然后以这些方式使用它：
foreach(KeyValuePair<string, string>k in formData)
{
Console.WriteLine(k.Key);
Console.WriteLine(k.Value);
}
....
if(formData.ContainsKey("lsd"))
Console.WriteLine("lsd is already in");
....
string v = formData["lsd"];
Console.WriteLine(v);
回答by Colin Mackay
Change the semi-colon to a comma on the third line and remove the square brackets from the first line.
将第三行的分号更改为逗号并删除第一行的方括号。
private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>
{
new KeyValuePair<String, String>("lsd",""),
new KeyValuePair<String, String>("charset", "")
};
Incidentally, if you change it to a Dictionary you get the ability to look up the values by their key more easily.
顺便说一句，如果您将其更改为字典，您将能够更轻松地通过键查找值。
回答by CloudyMarble
remove the []from the declaration
[]从声明中删除
回答by MarcinJuraszek
private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>()
{
new KeyValuePair<String, String>("lsd",""),
new KeyValuePair<String, String>("charset", "")
};
- Why
[]after the constructor? - Items within collection initializer has to be separated using comma:
,.
- 为什么
[]在构造函数之后？ - 集合初始值设定项中的项目必须使用逗号分隔：
,。
回答by Bj?rn M?rtensson
try
尝试
private List<KeyValuePair<String, String>> formData = new List<KeyValuePair<String, String>>
{
new KeyValuePair<String, String>("lsd",""),
new KeyValuePair<String, String>("charset", "")
};
回答by Mohammad Dehghan
Try this:
尝试这个：
private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>
{
new KeyValuePair<String, String>("lsd",""),
new KeyValuePair<String, String>("charset", "")
};
You had an extra []in your definition. You are not creating an array, so you don't need it. Also when initializing list with some values, the values should be separated by a comma (,).
你[]的定义中有一个额外的。您没有创建数组，因此不需要它。同样，在使用某些值初始化列表时，这些值应以逗号 ( ,)分隔。
In my opinion, a better approach would be to use Tupleclass:
在我看来，更好的方法是使用Tupleclass：
pirvate List<Tuple<string, string>> formData = new List<Tuple<string, string>>()
{
new Tuple<string, string>("lsd",""),
new Tuple<string, string>("charset", "")
};
