2025年C Marshal类基本概念和入门示例程序

科技前沿 • 2025-03-05 17:51 • 阅读 58

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微软对C#中Marshal类描述的链接在此；

https://docs.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.marshal?view=net-5.0

这是Marshal类的基本功能；.net一共包含四个Marshal类，每个都有一些方法；

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下面来看一个Marshal类基本程序；程序运行结果如下；

代码如下；

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace marshalDemo1 { public struct Point { public Int32 x, y; } public partial class Form1 : Form { [DllImport("Kernel32", ExactSpelling = true, SetLastError = true)] static extern Boolean CloseHandle(IntPtr h); public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { textBox1.Text = Marshal.SystemDefaultCharSize.ToString(); textBox2.Text = Marshal.SystemMaxDBCSCharSize.ToString(); textBox3.Text = Marshal.SizeOf(typeof(Point)).ToString(); Point p = new Point(); textBox4.Text = Marshal.SizeOf(p).ToString(); IntPtr hglobal = Marshal.AllocHGlobal(100); textBox5.Text = hglobal.ToString(); Marshal.FreeHGlobal(hglobal); Boolean f = CloseHandle(new IntPtr(-1)); if (!f) { Console.WriteLine("CloseHandle call failed with an error code of: {0}", Marshal.GetLastWin32Error()); } } } }

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2025年C Marshal类基本概念和入门示例程序

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