本文將介紹C++中通過DLL來調用C#代碼。
首先建立C#的“類庫”工程CShapeDLL。
然後輸入如下代碼:
- //C++通過DLL調用C#代碼
- //http://blog.csdn.net/morewindows/article/details/8678431
- //By MoreWindows( http://blog.csdn.net/MoreWindows )
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- namespace CShapeDLL
- {
- public class CMyAddClass
- {
- private int m_nNumber1;
- private int m_nNumber2;
- public int Number1
- {
- set { m_nNumber1 = value; }
- get { return m_nNumber1; }
- }
- public int Number2
- {
- set { m_nNumber2 = value; }
- get { return m_nNumber2; }
- }
- public int AddFunc()
- {
- return m_nNumber1 + m_nNumber2;
- }
- }
- public class CMyWriteLine
- {
- private string m_strText;
- public string Text
- {
- set { m_strText = value; }
- get { return Text; }
- }
- public void WriteLineFunc()
- {
- Console.WriteLine(m_strText);
- }
- }
- }
- // By MoreWindows( http://blog.csdn.net/MoreWindows )
這裏有兩個類,一個是MyAddClass類,是用來做加法運算的,另一個是CMyWriteLine,用來輸出文本的。
然後以C++控制檯程序爲例,C++代碼如下:
- //C++通過DLL調用C#代碼
- //http://blog.csdn.net/morewindows/article/details/8678431
- #using "CShapeDLL\\CShapeDLL\\bin\\Debug\\CShapeDLL.dll"
- //#using "CShapeDLL\\CShapeDLL\\bin\\Release\\CShapeDLL.dll"
- #include <stdio.h>
- #include <conio.h>
- using namespace CShapeDLL;
- int main()
- {
- printf(" C++通過DLL調用C#代碼\n");
- printf(" - By MoreWindows( http://blog.csdn.net/morewindows/article/details/8678431 ) -\n\n");
- CMyWriteLine ^ writeLineClass = gcnew CMyWriteLine;
- writeLineClass->Text = "使用C# 的CMyWriteLine示範";
- writeLineClass->WriteLineFunc();
- writeLineClass->Text = "By MoreWindows (http://blog.csdn.com/MoreWindows)";
- writeLineClass->WriteLineFunc();
- writeLineClass->Text = "http://blog.csdn.net/morewindows/article/details/8678431";
- writeLineClass->WriteLineFunc();
- printf("\n ---------------------------------- \n");
- CMyAddClass ^ addClass = gcnew CMyAddClass;
- addClass->Number1 = 3;
- addClass->Number2 = 5;
- printf("使用C# 的CMyAddClass示範\n");
- printf("%d + %d = %d\n", addClass->Number1, addClass->Number2, addClass->AddFunc());
- getch();
- return 0;
- }
- //By MoreWindows( http://blog.csdn.net/MoreWindows )
編譯,出錯。提示如下:
fatal error C1190: 託管目標代碼需要“/clr”選項
好吧,修改下,在“屬性”->“配置屬性”->“常規”->“公共語言運行庫支持”中選取“公共語言運行庫支持(/clr)”
再編譯,又出錯!提示如下:
1>正在編譯...
1>cl: 命令行error D8016 :“/MTd”和“/clr”命令行選項不兼容
1>項目: error PRJ0002 : 錯誤的結果2 (從“e:\Program Files\Microsoft Visual Studio 9.0\VC\bin\cl.exe”返回)。
好吧,再修改下,“屬性”->“配置屬性”->“C/C++”->“代碼生成”->“運行時庫”中選取“多線程DLL (/MD)”。
如果出現現下問題
1>------ 已啓動生成: 項目: test, 配置: Debug Win32 ------
1>正在編譯...
1>win321.cpp
1>e:\vs2005\vc\atlmfc\include\afx.h(24) : fatal error C1189: #error : Building MFC application with /MD[d] (CRT dll version) requires MFC shared dll version. Please #define _AFXDLL or do not use /MD[d]
再編譯,成功了。運行下,又出錯了——“應用程序發生異常未知的軟件異常(0xe0434f4d),位置爲 0x7c812fd3“。
這個怎麼解決了,很簡單,這是因爲EXE程序沒能加載到DLL文件導致的,將CShapeDLL.dll拷貝到EXE程序所在目錄下,再運行,成功了。結果如下圖所示(WinXP及Win7均可以運行):