class1.cs

C#开发教程 由浅入深 配有实例 是初学者的好帮手

using System;

namespace TestStrings
{
	public class TestStringsApp
	{
		public static void Main(string[] args)
		{
			string a = "strong";

			// replace all 'o' with 'i'
			string b = a.Replace('o', 'i');	
			Console.WriteLine(b);

			string c = b.Insert(3, "engthen");
			string d = c.ToUpper();
			Console.WriteLine(d);

			if (d == c)		// different
			{
				Console.WriteLine("same");
			}
			else
			{
				Console.WriteLine("different");
			}

			string q = "Foo";
			q = q.Replace('o', 'i');
			Console.WriteLine(q);

			string e = "dog" + "bee";
			e += "cat";
			string f = e.Substring(1,7);
			Console.WriteLine(f);

			for (int i = 0; i < f.Length; i++)
			{
				Console.Write("{0,-3}", f[i]);
			}
			Console.WriteLine();

			string g = null;
			if (f.StartsWith("og"))
			{	
				g = f.Remove(2,3);
			}
			Console.WriteLine(g);

			int x = 16;
			decimal y = 3.57m;
			string h = String.Format(
				"item {0} sells at {1:C}", x, y);
			Console.WriteLine(h);

			string t = 
				"item " + 12 + " sells at " + '\xA3' + 3.45;
			Console.WriteLine(t);
			Console.WriteLine();

			// this works because last param is a params object[]
			Console.WriteLine(
				"Hello {0} {1} {2} {3} {4} {5} {6} {7} {8}",
				123, 45.67, true, 'Q', 4, 5, 6, 7, '8');

			// this also works as from RC1
			string u = String.Format(
				"Hello {0} {1} {2} {3} {4} {5} {6} {7} {8}",
				123, 45.67, true, 'Q', 4, 5, 6, 7, '8');
			Console.WriteLine(u);
		}
	}
}