extern外部方法使用C#简单例子

外部方法使用C#简单例子

1、增加引用using System.Runtime.InteropServices;

2、声明和实现的连接[DllImport("kernel32", SetLastError = true)]

3、声明外部方法public static extern int GetCurrentDirectory(int a, StringBuilder b);

4、对外部方法操作 GetCurrentDirectory(300, pathstring);

 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
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;//引用外部
 
namespace extern
{
    public partial class DllImportForm : Form
    {
        public DllImportForm()
        {
            InitializeComponent();
        }
 
        [DllImport("kernel32", SetLastError = true)]//声明和实现的连接
        public static extern int GetCurrentDirectory(int a, StringBuilder b);//外部方法
        
        private void btnDisplay_Click(object sender, EventArgs e)
        {
            StringBuilder pathstring=new StringBuilder ();//返回路径
            GetCurrentDirectory(300, pathstring);
           this.listBox1.Items.Add (pathstring );
 
        }
    }
}

extern外部方法使用C#简单例子

上一篇:Windows2008R2域环境下银行网银问题


下一篇:windows 远程桌面kali