StringDictionary.Count属性用于获取StringDictionary中的键/值对的数量。
句法：
public virtual int Count { get; }
返回值：返回StringDictionary中的键/值对的数量。
注意：检索此属性的值是O(1)操作。
下面的程序说明了StringDictionary.Count属性的用法：
范例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);
}
}
输出：
Number of key/value pairs in myDict are : 0
范例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);
}
}
输出：
Number of key/value pairs in myDict are : 5
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.specialized.stringdictionary.count?view=netframework-4.7.2