class="FocusMe">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
monospace !important; font-size: 1em !important; font-style: normal !important; font-weight: normal !important; vertical-align: baseline !important; float: none !important; position: static !important; min-height: inherit !important; box-sizing: content-box !important;">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 );
}
}
}
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