C# 字典之间的比较<string, int>和输入值</string,>

Question

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
}

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

Any idea?

Thanks you for help !

Answer 1

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
}

Another way is to use TryGetValue() :

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

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