关于delphi Com+调用C# DLL的一点说明
最近公司进行产品改造,由于存在部分代码是用delphi写的Com+需要调用C#写的Dll方法,经过网上一些搜索和摸索,调用已经OK。但是至于两者之间的事务问题还需要用到的朋友深入研究。
现在来说一下调用过程:【本地调试通过,环境是XP,delphi7.0,vs2005】
首先在vs2005中创建一Class Library项目,添加2个cs文件,代码分别为:
声明一个接口
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace beep_Class
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{
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public interface IGO
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{
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string GO();
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}
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}
实现该接口![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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using System.Runtime.InteropServices;
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namespace beep_Class
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{
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[ClassInterface(ClassInterfaceType.None)]
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public class Class1:IGO
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{
7![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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public string GO()
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{
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return "aaaaabbbb";
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}
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}
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}
然后在生成类库之前设置一下该项目的属性,如下图所示:![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
注意红线标示的部分。
然后对此编译成功的DLL【beep_Class.dll】进行处理,打开vs2005自带的命令行工具。输入 tlbexp beep_Class.dll
生成 beep_Class.tlb文件。
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
下一步是打开delphi7,新建一个Application,在Form上增加一Button。然后选择Project下的,import type library,把刚才生成的Tlb文件【beep_Class.tlb】添加进来,然后点击 CreateUnit就ok了
delphi中的Button事件代码如下:
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procedure TForm1.Button1Click(Sender: TObject);
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var
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co:Class1;
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a:string;
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begin
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co:= CoClass1.Create;
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a:=co.GO();
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showmessage(a);
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end;
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end.
编译通过,运行结果如下图:![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
注意:运行的时候要把Beep_Class.dll放在程序目录中。
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