C#的指针

来源：互联网发布：外墙瓷砖搭配软件编辑：程序博客网时间：2024/06/05 13:29

对于C#来说,指针是没有任何意义的,写这个完全是爱好.业务的时候,写了个测试指针的类.测试了一下.感觉还可以

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace Test
{
    /// <summary>
    /// 测试C#数据存取
    /// </summary>
    class TestModel
    {
        struct TestStruct
        {
            public int a ;
            public string b;
        }

        private char[] str1 = "1".ToCharArray();
        private char[] str2 = "2".ToCharArray();
        public static TestModel kkk = new TestModel();

        public static void test()
        {
            TestStruct mm = new TestStruct();
            test2 kk = new test2();
            System.Console.WriteLine(Convert.ToString((Int64)Marshal.GetIUnknownForObject(mm)));
            System.Console.WriteLine(Convert.ToString((Int64)Marshal.GetIUnknownForObject(kk)));
            System.Console.ReadLine();
        }

        public static void testStruct()
        {
            TestStruct ttt = new TestStruct();
            TestModel t = TestModel.kkk;

            ttt.a = 1;
            char[] str1 ="3".ToCharArray();
            char[] str2 ="4".ToCharArray();
            ttt.b = "5";

            unsafe
            {
                IntPtr ptr = Marshal.GetIUnknownForObject(ttt.b);
                System.Console.WriteLine(Convert.ToString((Int64)ptr));

IntPtr ptr3 = Marshal.GetIUnknownForObject(str1);
System.Console.WriteLine(Convert.ToString((Int64)ptr3));

IntPtr ptr2 = Marshal.GetIUnknownForObject(str2);
System.Console.WriteLine(Convert.ToString((Int64)ptr2));

System.Console.WriteLine("t.str1="+Convert.ToString((Int64)Marshal.GetIUnknownForObject(t.str1)));
System.Console.WriteLine("t.str2="+Convert.ToString((Int64)Marshal.GetIUnknownForObject(t.str2)));

System.Console.WriteLine(Convert.ToString((Int64)Marshal.GetIUnknownForObject(t)));

                int a1 =2;
                int a3 = 3;
                int a4 = 4;
                int a5 = 5;

                System.Console.WriteLine(Convert.ToString((Int64)(&a1)));
                System.Console.WriteLine(Convert.ToString((Int64)(&a3)));
                System.Console.WriteLine(Convert.ToString((Int64)(&a4)));
                System.Console.WriteLine(Convert.ToString((Int64)(&a5)));
            }

            System.Console.WriteLine(Convert.ToString(Marshal.SizeOf(ttt)));
            System.Console.ReadLine();
        }

        public unsafe static void TestString()
        {
            string a = "abc";
            System.Console.WriteLine(Convert.ToString((Int64)Marshal.GetIUnknownForObject(a)));
            test(a);
            System.Console.ReadLine();
        }

        public unsafe static void test(string str)
        {
            IntPtr ptr = Marshal.GetIUnknownForObject(str);
            str = "123";
            object t = Marshal.GetObjectForIUnknown(ptr);
            System.Console.WriteLine(t.ToString());

System.Console.WriteLine(Convert.ToString((Int64)Marshal.GetIUnknownForObject(str)));
}

}

    public class test2
    {
        int a;
        int b;
        string a2;
        string b2 = "abc";
    }
}