要检查StringCollection是否为只读,代码如下-
using System; using System.Collections.Specialized; public class Demo { public static void Main() { StringCollection stringCol = new StringCollection(); String[] arr = new String[] { "100", "200", "300", "400", "500" }; Console.WriteLine("Array elements..."); foreach (string res in arr) { Console.WriteLine(res); } stringCol.AddRange(arr); Console.WriteLine("Is the StringCollection read-only? = "+stringCol.IsReadOnly); Console.WriteLine("Does the specified string is in the StringCollection? = "+stringCol.Contains("800")); } }
输出结果
这将产生以下输出-
Array elements... 100 200 300 400 500 Is the StringCollection read-only? = False Does the specified string is in the StringCollection? = False
让我们看另一个例子-
using System; using System.Collections.Specialized; public class Demo { public static void Main() { StringCollection stringCol = new StringCollection(); String[] arr = new String[] { "John", "Tim", "Kevin", "Bradman", "Katie", "Tom", "Nathan" }; Console.WriteLine("String array elements..."); foreach (string res in arr) { Console.WriteLine(res); } stringCol.AddRange(arr); Console.WriteLine("Is the StringCollection read-only? = "+stringCol.IsReadOnly); Console.WriteLine("Does the specified string is in the StringCollection? = "+stringCol.Contains("Tim")); } }
输出结果
这将产生以下输出-
String array elements... John Tim Kevin Bradman Katie Tom Nathan Is the StringCollection read-only? = False Does the specified string is in the StringCollection? = True