WPF大行其道,開發用戶界面確實非常方便。有時候需要調用很多以前用C++編寫的DLL庫,這就涉及到C sharp 中如何調用C++編寫的DLL的問題。一番嘗試之後,發現調用其實比較簡單。步驟記錄如下:
1:本例中DLL名稱為:Test.dll,提供的接口函數也很簡單:兩數相加 返回和值(int AddFunc(int a, int b))
將DLL拷貝到exe將要生成的文件夾下。
2:C sharp 代碼中記得添加using System.Runtime.InteropServices(否則的話 ,使用後文中提到的[DllImport("Test.dll")]時將會提示:The type oro namespace name'DllImport' could not be found的錯誤信息
3:Wpf 測試代碼如下,點擊Test按鈕之後,進入Button_Click_Test()函數,單步調試發現TestValue 為8,說明DLL調用成功了。
[csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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.Runtime.InteropServices; //添加
namespace WpfApplication
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
[DllImport("Test.dll")] //載入Test.dll
public static extern AddFunc(int a, int b); //引出DLL提供的接口函數之後,就可以直接調用了。
private void Button_Click_Test(object sender, RoutedEventArgs e)
{
int TestValue = 0;
TestValue = AddFunc(3, 5);
return;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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.Runtime.InteropServices; //添加
namespace WpfApplication
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
[DllImport("Test.dll")] //載入Test.dll
public static extern AddFunc(int a, int b); //引出DLL提供的接口函數之後,就可以直接調用了。
private void Button_Click_Test(object sender, RoutedEventArgs e)
{
int TestValue = 0;
TestValue = AddFunc(3, 5);
return;
}
}
}