Winforms 无法通过构造函数将Windows窗体传递给其他窗体

我想通过构造函数将Form1传递给Form2，但它不起作用，我想这是我这边的一件愚蠢的事情，但我不知道出了什么问题。我希望能在这里得到一些帮助

下面是Form1，它包含一个richtextbox和一个按钮，用于打开第二个表单

#pragma once

#include "Form2.h" 

namespace passForm {

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

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
        public: System::Windows::Forms::RichTextBox^  richTextBox1;
        public: System::Windows::Forms::Button^  open_form2_button;

        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>
        System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
            this->open_form2_button = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            // 
            // richTextBox1
            // 
            this->richTextBox1->Location = System::Drawing::Point(12, 12);
            this->richTextBox1->Name = L"richTextBox1";
            this->richTextBox1->Size = System::Drawing::Size(100, 96);
            this->richTextBox1->TabIndex = 0;
            this->richTextBox1->Text = L"";
            // 
            // open_form2_button
            // 
            this->open_form2_button->Location = System::Drawing::Point(159, 47);
            this->open_form2_button->Name = L"open_form2_button";
            this->open_form2_button->Size = System::Drawing::Size(89, 23);
            this->open_form2_button->TabIndex = 1;
            this->open_form2_button->Text = L"Open Form 2";
            this->open_form2_button->UseVisualStyleBackColor = true;
            this->open_form2_button->Click += gcnew System::EventHandler(this, &Form1::open_form2_button_Click);
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(284, 262);
            this->Controls->Add(this->open_form2_button);
            this->Controls->Add(this->richTextBox1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->ResumeLayout(false);

        }
#pragma endregion
    private: System::Void open_form2_button_Click(System::Object^  sender, System::EventArgs^  e) {


                 Form^ rgForm = gcnew Form2(this);
                 rgForm->Show();
                 //this->Hide(); 
             }
    };
}

表格2.h

私有：系统：：Windows：：窗体：：窗体^otherform

public:
    Form2()
    {
        InitializeComponent();
        //
        //TODO: Add the constructor code here
        //


    }

public:
    Form2(System::Windows::Forms::Form ^ frm1)
    {
        InitializeComponent();
        //
        //TODO: Add the constructor code here
        //
        otherform = frm1;  // this assignment is not working


    }

我猜这些部分会产生错误

请注意，当我只向构造函数传递richttxtbox对象时，一切都正常工作。

让我试着猜测一下：

我肯定作业是有效的，但你要这样做：

 otherform->richTextBox1->AppendText("Hello\n");

这是行不通的，因为System:：Windows:：Forms:：Form没有成员richTextBox1

您可能想要定义Form1的句柄，而不是Form

---

另一方面，我建议您使用事件机制在表单之间进行通信。第二个表单触发一个传递正确参数的事件，第一个表单安装该事件的句柄并进行适当的处理。

首先，在Form1类中，添加一个将设置RichTextBox值的方法：

public:
    void SetValue(System::String ^text)
    {
        richTextBox1->AppendText(text);
    }

然后在表单2中，单击按钮：

System::Void Form2::button1_Click(System::Object^  sender, System::EventArgs^  e)
{
    currForm1->SetValue("Hello\n");
}

它还没有做任何事情来编译它，就是在Form1 Form2.h文件中做一个早期语句。例如，在第一个命名空间中

ref class Form1;

它将在Form1.h文件中执行相同的操作：通过以下方式声明form2：

ref class Form2;

您的程序对我很好，如果您有任何问题，请不要犹豫，例如：

表格1.h：

#pragma once

#include "Form2.h"

namespace ArrayShallow {

    ref class Form2;

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

    /// <summary>
    /// Description résumée de Form1
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: ajoutez ici le code du constructeur
            //
        }

    protected:
        /// <summary>
        /// Nettoyage des ressources utilisées.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::RichTextBox^  richTextBox1;
    private: System::Windows::Forms::Button^  button1;
    protected:

    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->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            this->richTextBox1->Location = System::Drawing::Point(32, 25);
            this->richTextBox1->Name = L"richTextBox1";
            this->richTextBox1->Size = System::Drawing::Size(100, 96);
            this->richTextBox1->TabIndex = 0;
            this->richTextBox1->Text = L"";
            this->button1->Location = System::Drawing::Point(153, 157);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(75, 23);
            this->button1->TabIndex = 1;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(284, 261);
            this->Controls->Add(this->button1);
            this->Controls->Add(this->richTextBox1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->ResumeLayout(false);

        }
#pragma endregion
    private:
        Form2 ^ currForm2;
    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e);
    private: System::Void button1_Click(System::Object ^sender, System::EventArgs^ e);

    public:
        void SetValue(System::String ^text)
        {
            richTextBox1->AppendText(text);
        }
    };
}

执行此代码时：

---

你的代码是C++ + CLI而不是C++。请适当标记您的帖子。谢谢您的通知，先生。不，它不起作用。对于我的实现，我采取以下措施：错误C2039:“richTextBox1”：不是“System:：Windows:：Forms:：Form”的成员d:\visualstudio2008projects\training\passform\passform\Form2.h 114根据您的建议，我采取以下措施：错误C2039:“Form1”：不是'System:：Windows:：Forms'd:\visualstudio2008projects\training\passform\passform\Form2.h 25抱歉，我刚刚在代码中替换了Form1。我已经更新了我的答案。在表格1.h中，我更改了行形式^rgForm=gcnew Form2this；使用Form2^rgForm=gcnew Form2此；在Form2.h中，我更改了行private:System:：Windows:：Forms:：Form^otherform；使用private:Form1^otherform。现在，在其他编译错误中，我收到了错误C2065:“otherform”：未声明的标识符。感谢您的回复。你能更具体地谈谈那些早期的声明吗？你能举个例子吗？只需去掉Form1.cpp中包含主函数的部分。我必须说，在我所看过的书中，有很多干净的C++/CLI代码。结论是，我必须对名称空间和include进行更多的研究。非常感谢你！

ref class Form1;

ref class Form2;

#pragma once

#include "Form2.h"

namespace ArrayShallow {

    ref class Form2;

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

    /// <summary>
    /// Description résumée de Form1
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: ajoutez ici le code du constructeur
            //
        }

    protected:
        /// <summary>
        /// Nettoyage des ressources utilisées.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::RichTextBox^  richTextBox1;
    private: System::Windows::Forms::Button^  button1;
    protected:

    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->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            this->richTextBox1->Location = System::Drawing::Point(32, 25);
            this->richTextBox1->Name = L"richTextBox1";
            this->richTextBox1->Size = System::Drawing::Size(100, 96);
            this->richTextBox1->TabIndex = 0;
            this->richTextBox1->Text = L"";
            this->button1->Location = System::Drawing::Point(153, 157);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(75, 23);
            this->button1->TabIndex = 1;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(284, 261);
            this->Controls->Add(this->button1);
            this->Controls->Add(this->richTextBox1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->ResumeLayout(false);

        }
#pragma endregion
    private:
        Form2 ^ currForm2;
    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e);
    private: System::Void button1_Click(System::Object ^sender, System::EventArgs^ e);

    public:
        void SetValue(System::String ^text)
        {
            richTextBox1->AppendText(text);
        }
    };
}

#include "stdafx.h"
#include "Form1.h"

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

System::Void Form1::Form1_Load(System::Object^  sender, System::EventArgs^  e)
{
    currForm2 = gcnew Form2(this);
}

System::Void Form1::button1_Click(System::Object^  sender, System::EventArgs^  e)
{
    currForm2->Show();
}

int main(array<System::String ^> ^args)
{
    Application::EnableVisualStyles();
    Application::SetCompatibleTextRenderingDefault(false);
    Application::Run(gcnew Form1());
    return (0);
}

#pragma once

#include "Form1.h"

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 ArrayShallow {

    ref class Form1;

    /// <summary>
    /// Description résumée de Form2
    /// </summary>
    public ref class Form2 : public System::Windows::Forms::Form
    {
    private:
        Form1 ^currForm1;

    public:
        Form2(Form1 ^theForm1)
        {
            InitializeComponent();
            //
            //TODO: ajoutez ici le code du constructeur
            //
            currForm1 = theForm1;
        }

    protected:
        /// <summary>
        /// Nettoyage des ressources utilisées.
        /// </summary>
        ~Form2()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::Button^  button1;
    protected:

    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->button1 = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            // 
            // button1
            // 
            this->button1->Location = System::Drawing::Point(135, 107);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(75, 23);
            this->button1->TabIndex = 0;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &Form2::button1_Click);
            // 
            // Form2
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(284, 261);
            this->Controls->Add(this->button1);
            this->Name = L"Form2";
            this->Text = L"Form2";
            this->ResumeLayout(false);

        }
#pragma endregion
    private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e);
    };
}

#include "stdafx.h"
#include "Form2.h"

using namespace ArrayShallow;

System::Void Form2::button1_Click(System::Object^  sender, System::EventArgs^  e)
{
    currForm1->SetValue("Hello\n");
}