Lan Unity Development Fundamentals Two--lesson 24 Dictionary

Lan Unity Development Fundamentals Two--lesson 24 Dictionary

one, Dictionary

Dictionary is a collection of stored keys and values

Dictionary are unordered, key keys are unique

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usingSystem;
// Reference generic collection namespace
usingSystem.Collections.Generic;

namespacelesson_24
{
    class MainClass
    {
         public Static voidMain (string[] Args)
        {
            // Create a dictionary object, The type of key is string, The type of Value is int
            Dictionary<string,int> Dic=New Dictionary<string,int> ();

             The//add method is used to add a Key-value pair
Dic. ADD ("laowang", -);
Dic. ADD ("laozhang", -);

            // Remove key-value pairs from the dictionary
Dic. Remove ("laowang");

            // Empty current dictionary
Dic. Clear ();

            //gets The number of KeyValue in the current dictionary
            intcount = Dic. Count;
            Console. WriteLine (" There are in the current dictionary " +count+" a keyvalue." );

            // Check if the dictionary contains the specified Key
            BOOLB=dic. ContainsKey ("xiaoming");

            // Check whether the dictionary contains the specified Value
            BOOLC = Dic. Containsvalue ( the);

            // try to get the Value corresponding to the specified key
            ints;
Dic. TryGetValue ("xiaoming", outs);

            // If the current dictionary contains xiaoming This key, then the corresponding Value is obtained and saved in the s in bb=true
            // If the current dictionary does not contain xiaoming This key, then s=null,bb= False


            // get Value by Key
            intage= dic["laowang"];
            Console. WriteLine (age);

        }
    }
}

Lan Unity Development Fundamentals Two--lesson 24 Dictionary