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);
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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 ); } }} |