Project translated automatically. Log in or register, to view the original You need to write a test application, which consists of two parts - the visual part on C# (WinForms) and the business logic on C++ (external DLL library).In fact, you need to show how to implement the PInvoke connection mechanism with the callback marshall of functions and int type values (significance of X cycle) C# app is a window that contains the following components: 1st label 2ndThe ProgressBar ThreeThe EditBox 4 .Buttons to start business logic on C++ and stop the business logic process These components should display the state of execution of the business logic procedure on C++.The C# application when pressing the start button of the business logic should start the performance of the business logic in a separate stream so that it does not freeze the visual part for the long run of the business logic function. When you press the stop button, the business logic process must be correctly stopped. In C++ DLL callback functions should be transmitted to display label, ProgressBar, EditBox, MessageDlg, as well as the maximum value of the X cycle. C++ DLL c business logic makes the following: 1 .A cycle starts from 0 to X (will be the value of 100,000 to simulate a long work).2ndIn the cycle goes sleep(100ms) to imitate "long" work ThreeBusiness logic needs to update the visual part of the C# application (label, ProgressBar, EditBox) to indicate its status using callback functions ProgressBar shows the real state of process performance in percentages Label shows the current value of the cycle EditBox shows the beginning and end of the process, or a sign that the process has been interrupted.When the process with the business logic is interrupted, MessageDlg should be informed about this. C++ DLL does not know anything about appearance on C# and calling MessageDlg.All images occur through the callback features that are transmitted to it as a parameter. The project is required for Visual Studio 2017 Here is a Microsoft example of how it is implemented like: https://docs.microsoft.com/en-us/dotnet/framework/interop/marshaling-a-delegate-as-a-callback-method#calling-functions

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Mihail Reznikov

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Hello, I am working on the development of libraries on C#. I have a lot of work experience, more than 5 years. I will easily fulfill your order.

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Good night ! You have completed your task, there is only one small nuance, write in the figure.

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Vladislav Pro 14 July 2019

Сложного ничего нет, если в C++ библе правильно настроен экспорт функций

Vladimirovich Denis

14 July 2019

Ну вот мне и нужен готовый проект, где все это настроено

Vladislav Pro 14 July 2019

Ааа, я думал "бизнес-логика" уже написана)

Vladimirovich Denis

14 July 2019

Вся бизнес-логика - это цикл от 0 до X и задержка в теле цикла - это пару строчек на плюсах.

Vladimirovich Denis

15 July 2019

Вот пример бизнес-логики:
showEditBox("start");
for(auto i = 0; i < x; ++i)
{
if (interruptFlag)
{
shoMessageDlg("Interrupt");
break;
}
std::this_thread::sleep_for(std::chrono::milliseconds(100));
showProgress(...)
showLabel(strToInt(i));
}
showEditBox("stop");

Vladislav Pro 15 July 2019

Интересно каким образом передавать результат прохода цикла. Если функция выполняет что-то и возвращает результат, то как возвратить каждый раз результат цикла)

Vladimirovich Denis

15 July 2019

А зачем что-то куда-то передавать? Нам нужно отобразить изменения на форме и это делается callback функцией showProgress, showLabel,...

Vladislav Pro 15 July 2019

А, ну если колбеком то конечно просто)

Vladimirovich Denis

15 July 2019

Ну так это собственно в задании и написано, что отображение идет через callback функции, которые передаются в DLL вместе с X в качестве параметров.

Vladislav Pro 15 July 2019

Да я уже понял, сдалал даже, скрины скинул Вам в ЛС

Vladimirovich Denis

15 July 2019

Вот пример Микрософта как это делается: https://docs.microsoft.com/en-us/dotnet/framework/interop/marshaling-a-delegate-as-a-callback-method#calling-functions

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