Преобразование Bitmap в Image

        if (pictureBox3->Image == nullptr) {
            srand((unsigned)time(nullptr));
            int integer = rand() % 35;
            string n;
            ostringstream stream;
            stream << integer;
            n = stream.str();
            string path = "card\\";
            pictureBox3->Image = gcnew Bitmap(path + n + ".jpg");
        }

pictureBox3->Image = gcnew Bitmap(path + n + ".jpg");

#pragma once
#include <ctime>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <windows.h>
#include <string>
#include <sstream>
#include<iostream>
#include<cstdlib>
namespace ochko2 {
 
    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 std;
    /// <summary>
    /// Сводка для MyForm
    /// </summary>
    public ref class MyForm : public System::Windows::Forms::Form
    {
    public:
        MyForm(void)
        {
            InitializeComponent();
            //
            //TODO: добавьте код конструктора
            //
            
            pictureBox1->Image = Image::FromFile("card\\6.png");
            pictureBox2->Image = Image::FromFile("card\\8.png");
        }
 
    protected:
        /// <summary>
        /// Освободить все используемые ресурсы.
        /// </summary>
        ~MyForm()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::Label^ label1;
    private: System::Windows::Forms::Button^ button1;
    private: System::Windows::Forms::Button^ button2;
    private: System::Windows::Forms::PictureBox^ pictureBox1;
    private: System::Windows::Forms::PictureBox^ pictureBox2;
    private: System::Windows::Forms::PictureBox^ pictureBox3;
    private: System::Windows::Forms::PictureBox^ pictureBox4;
    private: System::Windows::Forms::PictureBox^ pictureBox5;
    private: System::Windows::Forms::PictureBox^ pictureBox6;
    private: System::Windows::Forms::PictureBox^ pictureBox7;
    private: System::Windows::Forms::PictureBox^ pictureBox8;
    private: System::Windows::Forms::Label^ label2;
    private: System::Windows::Forms::Label^ label3;
    private: System::Windows::Forms::Label^ label4;
 
 
 
 
 
 
    protected:
 
    private:
        /// <summary>
        /// Обязательная переменная конструктора.
        /// </summary>
        double null = 0;
        System::ComponentModel::Container ^components;
 
#pragma region Windows Form Designer generated code
        /// <summary>
        /// Требуемый метод для поддержки конструктора — не изменяйте 
        /// содержимое этого метода с помощью редактора кода.
        /// </summary>
        void InitializeComponent(void)
        {
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->button2 = (gcnew System::Windows::Forms::Button());
            this->pictureBox1 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox2 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox3 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox4 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox5 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox6 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox7 = (gcnew System::Windows::Forms::PictureBox());
            this->pictureBox8 = (gcnew System::Windows::Forms::PictureBox());
            this->label2 = (gcnew System::Windows::Forms::Label());
            this->label3 = (gcnew System::Windows::Forms::Label());
            this->label4 = (gcnew System::Windows::Forms::Label());
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox2))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox3))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox4))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox5))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox6))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox7))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox8))->BeginInit();
            this->SuspendLayout();
            // 
            // label1
            // 
            this->label1->AutoSize = true;
            this->label1->Font = (gcnew System::Drawing::Font(L"Mistral", 72, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                static_cast<System::Byte>(204)));
            this->label1->Location = System::Drawing::Point(621, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(240, 114);
            this->label1->TabIndex = 0;
            this->label1->Text = L"ОЧКО";
            this->label1->Click += gcnew System::EventHandler(this, &MyForm::label1_Click);
            // 
            // button1
            // 
            this->button1->Location = System::Drawing::Point(1328, 534);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(75, 61);
            this->button1->TabIndex = 1;
            this->button1->Text = L"Ещё";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
            // 
            // button2
            // 
            this->button2->Location = System::Drawing::Point(1409, 534);
            this->button2->Name = L"button2";
            this->button2->Size = System::Drawing::Size(75, 61);
            this->button2->TabIndex = 2;
            this->button2->Text = L"Стоп";
            this->button2->UseVisualStyleBackColor = true;
            this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
            // 
            // pictureBox1
            // 
            this->pictureBox1->Location = System::Drawing::Point(1101, 345);
            this->pictureBox1->Name = L"pictureBox1";
            this->pictureBox1->Size = System::Drawing::Size(200, 250);
            this->pictureBox1->TabIndex = 3;
            this->pictureBox1->TabStop = false;
            this->pictureBox1->Click += gcnew System::EventHandler(this, &MyForm::pictureBox1_Click);
            // 
            // pictureBox2
            // 
            this->pictureBox2->Location = System::Drawing::Point(1052, 345);
            this->pictureBox2->Name = L"pictureBox2";
            this->pictureBox2->Size = System::Drawing::Size(200, 250);
            this->pictureBox2->TabIndex = 4;
            this->pictureBox2->TabStop = false;
            this->pictureBox2->Click += gcnew System::EventHandler(this, &MyForm::pictureBox2_Click);
            // 
            // pictureBox3
            // 
            this->pictureBox3->Location = System::Drawing::Point(1002, 345);
            this->pictureBox3->Name = L"pictureBox3";
            this->pictureBox3->Size = System::Drawing::Size(200, 250);
            this->pictureBox3->TabIndex = 5;
            this->pictureBox3->TabStop = false;
            // 
            // pictureBox4
            // 
            this->pictureBox4->Location = System::Drawing::Point(944, 345);
            this->pictureBox4->Name = L"pictureBox4";
            this->pictureBox4->Size = System::Drawing::Size(200, 250);
            this->pictureBox4->TabIndex = 6;
            this->pictureBox4->TabStop = false;
            // 
            // pictureBox5
            // 
            this->pictureBox5->Location = System::Drawing::Point(846, 345);
            this->pictureBox5->Name = L"pictureBox5";
            this->pictureBox5->Size = System::Drawing::Size(200, 250);
            this->pictureBox5->TabIndex = 7;
            this->pictureBox5->TabStop = false;
            // 
            // pictureBox6
            // 
            this->pictureBox6->Location = System::Drawing::Point(895, 345);
            this->pictureBox6->Name = L"pictureBox6";
            this->pictureBox6->Size = System::Drawing::Size(200, 250);
            this->pictureBox6->TabIndex = 8;
            this->pictureBox6->TabStop = false;
            // 
            // pictureBox7
            // 
            this->pictureBox7->Location = System::Drawing::Point(796, 345);
            this->pictureBox7->Name = L"pictureBox7";
            this->pictureBox7->Size = System::Drawing::Size(200, 250);
            this->pictureBox7->TabIndex = 9;
            this->pictureBox7->TabStop = false;
            // 
            // pictureBox8
            // 
            this->pictureBox8->Location = System::Drawing::Point(747, 345);
            this->pictureBox8->Name = L"pictureBox8";
            this->pictureBox8->Size = System::Drawing::Size(200, 250);
            this->pictureBox8->TabIndex = 10;
            this->pictureBox8->TabStop = false;
            // 
            // label2
            // 
            this->label2->AutoSize = true;
            this->label2->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 27.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                static_cast<System::Byte>(204)));
            this->label2->Location = System::Drawing::Point(1212, 9);
            this->label2->Name = L"label2";
            this->label2->Size = System::Drawing::Size(191, 42);
            this->label2->TabIndex = 11;
            this->label2->Text = L"Ваш счёт:";
            this->label2->Click += gcnew System::EventHandler(this, &MyForm::label2_Click);
            // 
            // label3
            // 
            this->label3->AutoSize = true;
            this->label3->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 27.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                static_cast<System::Byte>(204)));
            this->label3->Location = System::Drawing::Point(1402, 9);
            this->label3->Name = L"label3";
            this->label3->Size = System::Drawing::Size(0, 42);
            this->label3->TabIndex = 12;
            // 
            // label4
            // 
            this->label4->AutoSize = true;
            this->label4->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 27.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                static_cast<System::Byte>(204)));
            this->label4->Location = System::Drawing::Point(1409, 9);
            this->label4->Name = L"label4";
            this->label4->Size = System::Drawing::Size(39, 42);
            this->label4->TabIndex = 13;
            this->label4->Text = L"0";
            // 
            // MyForm
            // 
            this->AccessibleRole = System::Windows::Forms::AccessibleRole::None;
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(1496, 607);
            this->Controls->Add(this->label4);
            this->Controls->Add(this->label3);
            this->Controls->Add(this->label2);
            this->Controls->Add(this->pictureBox1);
            this->Controls->Add(this->pictureBox2);
            this->Controls->Add(this->pictureBox3);
            this->Controls->Add(this->pictureBox4);
            this->Controls->Add(this->pictureBox6);
            this->Controls->Add(this->button2);
            this->Controls->Add(this->button1);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->pictureBox5);
            this->Controls->Add(this->pictureBox7);
            this->Controls->Add(this->pictureBox8);
            this->Name = L"MyForm";
            this->Text = L"MyForm";
            this->Load += gcnew System::EventHandler(this, &MyForm::MyForm_Load);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox2))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox3))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox4))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox5))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox6))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox7))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox8))->EndInit();
            this->ResumeLayout(false);
            this->PerformLayout();
 
        }
#pragma endregion
    
    private: System::Void label1_Click(System::Object^ sender, System::EventArgs^ e) {
    }
 
    private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
        if (pictureBox3->Image == nullptr) {
            srand((unsigned)time(nullptr));
            int integer = rand() % 35;
            string n;
            ostringstream stream;
            stream << integer;
            n = stream.str();
            string path = "card\\";
            pictureBox3->Image = gcnew Bitmap(path + n + ".jpg");
        }
        ///pictureBox3->Image = Image::FromFile("card\\18.png");
        ///pictureBox4->Image = Image::FromFile("card\\19.png");
    }
    private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {
    }
    private: System::Void pictureBox2_Click(System::Object^ sender, System::EventArgs^ e) {
    }
    private: System::Void pictureBox1_Click(System::Object^ sender, System::EventArgs^ e) {
    }
    private: System::Void MyForm_Load(System::Object^ sender, System::EventArgs^ e) {
    }
    private: System::Void label2_Click(System::Object^ sender, System::EventArgs^ e) {
    }
};
}

if (pictureBox1->Image == nullptr) 
        {
            srand((unsigned)time(nullptr));
            int integer = rand() % 35;
            /*std::string n;
            std::ostringstream stream;
            stream << integer;
            n = stream.str();*/
            String^ path = "card\\";
            pictureBox1->Image = gcnew Bitmap(path + Convert::ToString(n) + ".jpg");
        }