C# |获取字符串中键/值对的数量
原文:https://www . geesforgeks . org/c-sharp-get-the-number-of-key-value-pairs-in-stringdictionary/
StringDictionary。Count 属性用于获取字符串中键/值对的数量。
语法:
public virtual int Count { get; }
返回值:返回字符串中键/值对的数量。
注意:检索该属性的值是一个 O(1)运算。
下面的程序说明了字符串的使用。计数属性:
例 1:
// C# code to get the number of key/value
// pairs in the StringDictionary
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a StringDictionary named myDict
StringDictionary myDict = new StringDictionary();
// Getting the number of key/value
// pairs in the StringDictionary
Console.Write("Number of key/value pairs in myDict are : ");
Console.WriteLine(myDict.Count);
}
}
Output:
Number of key/value pairs in myDict are : 0
例 2:
// C# code to get the number of key/value
// pairs in the StringDictionary
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// Creating a StringDictionary named myDict
StringDictionary myDict = new StringDictionary();
// Adding key and value into the StringDictionary
myDict.Add("G", "Geeks");
myDict.Add("F", "For");
myDict.Add("C", "C++");
myDict.Add("DS", "Data Structures");
myDict.Add("N", "Noida");
// Getting the number of key/value
// pairs in the StringDictionary
Console.Write("Number of key/value pairs in myDict are : ");
Console.WriteLine(myDict.Count);
}
}
Output:
Number of key/value pairs in myDict are : 5
参考:
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