C# |获取 StringCollection 中的字符串个数
原文:https://www . geeksforgeeks . org/c-sharp-get-the-number-in-string collection/
StringCollection 类是。表示字符串集合的. NET Framework 类库。在 系统中定义了 StringCollection 类。收藏.专门命名空间。
StringCollection。Count 属性用于获取 StringCollection 中包含的字符串数。
语法:
public int Count { get; }
返回值:返回 StringCollection 中包含的字符串数。
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集合的使用。计数属性:
例 1:
// C# code to get the number of strings
// contained in the StringCollection
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// creating a StringCollection named myCol
StringCollection myCol = new StringCollection();
// creating a string array named myArr
String[] myArr = new String[] { "First", "Second", "Third",
"Fourth", "Fifth" };
// Copying the elements of a string
// array to the end of the StringCollection.
myCol.AddRange(myArr);
// To get number of Strings contained
// in the StringCollection
Console.WriteLine("Number of strings in myCol are : " + myCol.Count);
}
}
Output:
Number of strings in myCol are : 5
例 2:
// C# code to get the number of strings
// contained in the StringCollection
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// creating a StringCollection named myCol
StringCollection myCol = new StringCollection();
// creating a string array named myArr
String[] myArr = new String[] {};
// Copying the elements of a string
// array to the end of the StringCollection.
myCol.AddRange(myArr);
// To get number of Strings contained
// in the StringCollection
Console.WriteLine("Number of strings in myCol are : "
+ myCol.Count);
}
}
Output:
Number of strings in myCol are : 0
参考:
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