Array.BinarySearch(Array，Object)方法，带有C#中的示例
C#中的Array.BinarySearch(Array,Object)方法用于通过数组的每个元素和指定的对象实现的IComparable接口，在整个一维排序数组中搜索特定元素。
语法
public static int BinarySearch (Array arr, object val);
上面的arr是排序的一维数组，而val是要搜索的对象。
示例
using System;
public class Demo {
public static void Main() {
int[] intArr = {5, 10, 15, 20};
Array.Sort(intArr);
Console.WriteLine("Array elements...");
foreach(int i in intArr) {
Console.WriteLine(i);
}
Console.Write("Element 25 is at index = " + Array.BinarySearch(intArr, 20));
}
}输出结果
Array elements... 5 10 15 20 Element 25 is at index = 3
示例
using System;
public class Demo {
public static void Main() {
string[] strArr = {"John", "Tim", "Fedric", "Gary", "Harry", "Damien"};
Array.Sort(strArr);
Console.WriteLine("Array elements...");
foreach(string s in strArr) {
Console.WriteLine(s);
}
Console.Write("Element Gary is at index = " + Array.BinarySearch(strArr, "Gary"));
Console.Write("\nElement Tom is at index = " + Array.BinarySearch(strArr, "Tom"));
}
}输出结果
Array elements... Damien Fedric Gary Harry John Tim Element Gary is at index = 2 Element Tom is at index = -7