In QTP script, i want to use external dll which is written by C# language.
I produced a very simple dll, pls see the following code

namespace ADDFun
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class ADDFun
{
public int AddFunction()
{
return 1;
}
}
}

Then in the QTP, i used it as the following way
Extern.Declare micInteger,"AddFunction", "C:\ADDFun.dll", "AddFunction"

The function has no parameter, and it will return a number.

Then i ran this script, a error occured, it said that "Invalid procedure call or argument" .

Can anyone help me?
Thanks

Probably it doesn't work that simply as you thought.sdlkfj2

To call an external function through Extern.Declare within a QTP test script is applicable for those functions like Windows API.
But it won't work for a C# dll like you developed because no function is exported directly from that dll.

Actually, the function AddFunction is exported through a public method in the class ADDFun from the dll.
Suppose I want to call the method AddFunction in another C# application, first I would import ADDFun.dll into that application, And then in the application, I would implement several statements like below:
//Declare an object instance with ADDFun class
ADDFun objADDFun;
//Call the function from the object instance
objADDFun.AddFunction();
It's impossible to do the same in a QTP script.

Maybe you can find a way to directly export a simple function instead of a class in a C# dll. Otherwise, you won't be able to call the function.

靠，用英语来贼啊
看了半天，看到最后一句
Otherwise, you won't be able to call the function.
sdlkfj4
我现在用VB6.0也不行啊

在那个用C#开发的dll里面导出的不是一个简单的Function，而是一个Class，本来想导出的Function是那个Class的一个Public方法。
在其他应用程序里面，只能先声明这个类的对象实体，然后才能调用那个方法。显然QTP是不支持的，QTP只能引用包含了类似WinAPI的外部dll。

Please see other people feedback:

It should be signed DLL and registered in GlobalCashe

[for Extern.Declare calling]

Or:

written as COM [for calling via Object Creation]

If you can code on C# - there is new possibility in QTP 9.1 - DotNetFactory object. It's amazing and powerful.
You can write DLL as well as use direct C# coding in TestCase with instantiating C# public classes.
Play with that.

Janna

SQAForum里面有好几个主题贴都深入讨论了QTP如何调用Dll。
不同的Dll输出方式是有区别的，QTP引用dll可以分成两部分来看，Dll输出什么，QTP如何调用。我觉得最初那段C#代码输出的不是一般意义的函数，而是一个类，该类包含了一个方法是希望被QTP调用的。
QTP9.1里面的DotNetFactory方法，可以闯将已经注册的类型。但是前提是用C#开发出来的类型要注册到系统里面。

呵呵，小阎为什么发帖用英文？
C#没用过帮不了你sdlkfj7

引用:

原帖由 Alexander 于 2007-4-26 16:29 发表
In QTP script, i want to use external dll which is written by C# language.
I produced a very simple dll, pls see the following code

namespace ADDFun
{
///
/// Summary description for Cla ...

其实摸索这个问题好像是很难，但是其实很简单，大家来看看我的代码
using System;
using System.Collections.Generic;
using System.Text;

namespace ClassLibrary1
{
    public class Class1
    {
        public int Test()
        {
            return 10;
        }
    }
}

下面就是关键了，
1.必须用VS2005 的命令行 键人： sn -k "XXXX\*.snk" 其中X，*是路径和文件名
2.打开AssemblyInfo.cs文件， 键入
  [assembly: AssemblyKeyFile("D:\\Projects\\MyTest\\Dll\\ClassLibrary1\\ClassLibrary1\\bin\\Debug\\mykey.snk")]
3.Build
4.把这个dll文件靠本到目标机子中的 system\assembly文件夹中
5.打开QTP 9.2（好像9.0版本及以上都可以）
  键入 ：
   Set myclass=DotNetFactory.CreateInstance("ClassLibrary1.Class1","ClassLibrary1")
  c1=myclass.Test()
  MsgBox c1
  显示是10

结论： 大家看是不是很简单，主要是强名称的问题，对于非强名称的dll，现在还不知道有什么办法调用。

呵呵 强人啊
顶一下
马上下来试试

厉害

学习了，顶

你们试过能行???

昨我试过不行！

1.必须用VS2005 的命令行 键人： sn -k "XXXX\*.snk" 其中X，*是路径和文件名
我做.它说不支持此命令
Set myclass=DotNetFactory.CreateInstance("ClassLibrary1.Class1","ClassLibrary1")
它说cannot load assembly qtpinit
具体此DLL要放在哪里.. 可以在代码那里指定它放的位置不?

问题解决了.

请问 QTP 里面的 对象模型 在 C++ 里面怎么引用啊？

谢谢了哈！！

Cannot load Assembly ClassLibrary1
我这里这样提示~啥情况?>
我用QTP9.0

[ 本帖最后由 milan330330 于 2007-10-16 15:45 编辑 ]

VC中,这种类的调用,好象是实现不了,不知道大家有什么好的办法.看这个贴子.
http://bbs.51testing.com/thread-95390-1-1.html

我使用强名称，用sn -v XX.dll 察看，已经成功，为什么在qtp调用的时候提示：文件格式不正确？希望你能予以解答

同志们谁能帮助解决一下