字典< string，int>之间的C#比较和输入的值 [英] C# Comparaison between Dictionary<string, int> and value in enter

问题描述

我有一个函数可以将多个字符串关联到int:

I have a function for stock many string associate to int:

public int Scale(string value)
{
 this.stringToInt = new Dictionary<string, int>()
 {
  {"1p",00},{"2p",01},{"3p",03} ... {"300p",40}
 };
// Here i try to do something like that: if(value == (String in dictionary) return associate int
}

所以我尝试比较enter接收的字符串和字典中返回return int的字符串之间的比较.

So i try to do a comparaison between string receive in enter and string in my dictionary for return associate int.

有什么主意吗?

感谢您的帮助！

推荐答案

您可以使用 Dictionary 的 ContainsKey()方法检查字典中是否存在密钥:

You can use ContainsKey() method of Dictionary to check if the key is present in dictionary:

if (this.stringToInt.ContainsKey(value)
{
    return this.stringToInt[value];
}
else 
{
    // return something else
}

另一种方法是使用 TryGetValue():

var valueGot = this.stringToInt.TryGetValue(value, out var associate);

if (valueGot)
{
    return associate;
}
else 
{
    // return something else
}

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