我刚接触C++/CLI并使用WinForms。我有一个GUI程序来运行C可执行文件（使用Visual Code g编译和构建），它从.dat文件中获取输入（整型、双精度、字符型bool）。使用GUI，您可以编辑输入。这是通过使用ToolStripMenu单击并打开辅助WinForm来完成的。我使用ToolStripMenu是因为我将有多个WinForm来编辑输入。基本设置为：

我的表单.cpp

#include <fstream>
#include "MyForm.h"

using namespace System;
using namespace System::Windows::Forms;

[STAThread]

void main(array<String^>^ args) {
    std::ifstream myfile1("datafile1.dat");
    if (myfile1.is_open()) {
        myfile >> [...];
        // This is where the vars are defined.
        // They are declared only in separate header files.
    }
    Application::EnableVisualStyles();
    Application::SetCompatibleTextRenderingDefault(false);
    Project_name::MyForm form;
    Application::Run(% form);

}

我的表单.h

#pragma once
#include "ParForm.h"   // WinForm to open using ToolStripMenuItem

namespace Project_name {
    // All the code for all Controls
    // This is where the ToolStripMenu is created with its Items

    private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
        System::Diagnostics::Process::Start("PATH\\rooster.exe");
    }
    private: System::Void ToolStripMenuItem1_Click(System::Object^ sender, System::EventArgs^ e) {
        ParForm ^Par = gcnew ParForm();
        Par->ShowDialog();
    }
}

参数格式.h

#pragma once
#include "parameters.h" // This is where the vars are declared

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

    public ref class ParForm : public System::Windows::Forms::Form {
    public:
        ParForm(void) {
            InitializeComponent();
        }
    protected:
        ~ParForm() {
            if (components) {
                delete components;
            }
        }
    private: System::Windows::Forms::TextBox^ TextBox1;
    private: System::ComponentModel::IContainer^ components;
    private:
#pragma region Windows Form Designer generated code
        void InitializeComponent(void) {
            this->TextBox1 = (gcnew System::Windows::Forms::TextBox());
            // 
            // TextBox1
            // 
            this->TextBox1->Location = System::Drawing::Point(220, 62);
            this->TextBox1->Margin = System::Windows::Forms::Padding(3, 2, 3, 2);
            this->TextBox1->Name = L"TextBox1";
            this->TextBox1->Size = System::Drawing::Size(100, 22);
            this->TextBox1->TabIndex = 32;
            // 
            // ParForm
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(8, 16);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(727, 678);
            this->Controls->Add(this->TextBox1);
            this->Margin = System::Windows::Forms::Padding(3, 2, 3, 2);
            this->MaximumSize = System::Drawing::Size(727, 678);
            this->MinimumSize = System::Drawing::Size(727, 678);
            this->Name = L"ParForm";
            this->Text = L"Parameters";
            this->ResumeLayout(false);
            this->PerformLayout();
    }
#pragma endregion
    };
}

我想要的是当使用ToolStripMenuItem打开WinForm时，在TextBox-〉Text中显示变量的值。所以我写了一个双精度浮点数this->TextBox1->Text = Convert::ToString(var)。当我运行程序（调试模式）时，这一切都工作正常。所有的值都正确显示，我的OK和Cancel按钮按预期工作（更改变量值并保存到datafile.dat）。然后运行使用修改后的值的c++可执行文件也工作正常。
然而，有时候当我停止调试（因为一个错误）时，我输入的代码行被删除了。是什么导致了这种行为？我有一种感觉，这与调用时值是如何加载到WinForms中的有关。顺序不对吗？
"我的努力"
我不知道为什么会发生这种情况。我试着在谷歌上搜索它，并检查StackOverflow论坛的帖子，但我没有得到有用的点击。我检查了TextBox类的文档，看看是否有一个属性或方法来“预加载”文本，但我使用的方法应该是我在互联网上找到的。