C#•6mo ago

winforms clr/c++ usercontrol issue

Hello everyone, I'm facing a tricky problem while developing an application in C++/CLR with WinForms in Visual Studio. When I try to display a UserControl in design view, I encounter the following error: MyUserControl.h :

c++
#pragma once

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

namespace userControl {

    /// <summary>
    /// Description résumée de MyUserControl
    /// </summary>
    public ref class MyUserControl : public System::Windows::Forms::UserControl
    {
    public:
        MyUserControl(void)
        {
            InitializeComponent();
            //
            //TODO: ajoutez ici le code du constructeur
            //
        }

    protected:
        /// <summary>
        /// Nettoyage des ressources utilisées.
        /// </summary>
        ~MyUserControl()
        {
            if (components)
            {
                delete components;
            }
        }

    private:
        /// <summary>
        /// Variable nécessaire au concepteur.
        /// </summary>
        System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Méthode requise pour la prise en charge du concepteur - ne modifiez pas
        /// le contenu de cette méthode avec l'éditeur de code.
        /// </summary>
        void InitializeComponent(void)
        {
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
        }
#pragma endregion
    };
}

c++
#pragma once

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

namespace userControl {

    /// <summary>
    /// Description résumée de MyUserControl
    /// </summary>
    public ref class MyUserControl : public System::Windows::Forms::UserControl
    {
    public:
        MyUserControl(void)
        {
            InitializeComponent();
            //
            //TODO: ajoutez ici le code du constructeur
            //
        }

    protected:
        /// <summary>
        /// Nettoyage des ressources utilisées.
        /// </summary>
        ~MyUserControl()
        {
            if (components)
            {
                delete components;
            }
        }

    private:
        /// <summary>
        /// Variable nécessaire au concepteur.
        /// </summary>
        System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Méthode requise pour la prise en charge du concepteur - ne modifiez pas
        /// le contenu de cette méthode avec l'éditeur de code.
        /// </summary>
        void InitializeComponent(void)
        {
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
        }
#pragma endregion
    };
}

3 Replies

Mattheo•6mo ago

(default code generated by clr) I can send more code if it's needed The data needed to complete this operation is not yet available. (Exception from HRESULT: 0x8000000A) This error appears to be related to the generation of the DOM code in the visual design process. I have tried several solutions, such as repairing Visual Studio, checking references, disabling automatic code generation, but the problem persists. Can someone help me to fix it ? I'm a beginner Thank you in advance for your assistance.

Petris•6mo ago

Why are you using C++/CLI for this?

Mattheo•5mo ago

Humm... idk 😂 Is C# better for winforms ?

Gaming

Programming

winforms clr/c++ usercontrol issue