在C#中调用C语言写的动态链接库 DLL

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1.首先将相关的C语言接口的DLL文件复制到bin\Debug
2.添加 using System.Windows.Shapes;
3. 在类中用一下方式添加接口函数
[DllImport("TFFT.dll", EntryPoint = "TtfTest_InitTestEvn")]
public static extern int TtfTest_InitTestEvn();

[DllImport("TFFT.dll", EntryPoint = "TtfTest_Test")]
public static extern int TtfTest_Test();

4.在相应的地方引用相关的函数TtfTest_InitTestEvn()，TtfTest_Test()。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;                    using System.Windows.Shapes; using System.Runtime.InteropServices;namespace One{    /// <summary>    /// MainWindow.xaml 的交互逻辑    /// </summary>    ///       public partial class MainWindow : Window    {        [DllImport("TFFT.dll", EntryPoint = "TtfTest_InitTestEvn")]        public static extern int TtfTest_InitTestEvn();        [DllImport("TFFT.dll", EntryPoint = "TtfTest_Test")]        public static extern int TtfTest_Test();           public MainWindow()        {            InitializeComponent();        }        private void Button_Click(object sender, RoutedEventArgs e)        {            string strDiffTime;            DateTime dtStart, dtEnd;            dtStart = DateTime.Now;            for (int i = 0; i < 10; ++i )            {                MainWindow.TtfTest_InitTestEvn();                MainWindow.TtfTest_Test();            }                      dtEnd = DateTime.Now;//获得当前时间            double dStartTime = dtStart.TimeOfDay.TotalSeconds;            double dEndTime = dtEnd.TimeOfDay.TotalSeconds;            strDiffTime = (dEndTime - dStartTime).ToString() + ":s";            MessageBox.Show(strDiffTime);                  }    }}

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