LB23_1_1

#pragma once

namespace LB23_1_2 {

    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 System::IO;

    /// <summary>
    /// Сводка для Form1
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: добавьте код конструктора
            //
        }

    protected:
        /// <summary>
        /// Освободить все используемые ресурсы.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::DataGridView^  dataGridView1;
    private: System::Windows::Forms::DataGridViewTextBoxColumn^  Column1;
    private: System::Windows::Forms::DataGridViewTextBoxColumn^  Column2;
    private: System::Windows::Forms::DataGridViewTextBoxColumn^  Column3;
    private: System::Windows::Forms::DataGridViewTextBoxColumn^  Column4;
    private: System::Windows::Forms::Button^  button1;
    private: System::Windows::Forms::Button^  button2;
    private: System::Windows::Forms::Button^  button3;
    protected:





    private:
        /// <summary>
        /// Требуется переменная конструктора.
        /// </summary>
        System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Обязательный метод для поддержки конструктора - не изменяйте
        /// содержимое данного метода при помощи редактора кода.
        /// </summary>
        void InitializeComponent(void)
        {
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->Column1 = (gcnew System::Windows::Forms::DataGridViewTextBoxColumn());
            this->Column2 = (gcnew System::Windows::Forms::DataGridViewTextBoxColumn());
            this->Column3 = (gcnew System::Windows::Forms::DataGridViewTextBoxColumn());
            this->Column4 = (gcnew System::Windows::Forms::DataGridViewTextBoxColumn());
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->button2 = (gcnew System::Windows::Forms::Button());
            this->button3 = (gcnew System::Windows::Forms::Button());
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            //
            // dataGridView1
            //
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Columns->AddRange(gcnew cli::array< System::Windows::Forms::DataGridViewColumn^  >(4) {this->Column1,
                this->Column2, this->Column3, this->Column4});
            this->dataGridView1->Location = System::Drawing::Point(12, 12);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->Size = System::Drawing::Size(444, 150);
            this->dataGridView1->TabIndex = 0;
            //
            // Column1
            //
            this->Column1->HeaderText = L"Тип";
            this->Column1->Name = L"Column1";
            //
            // Column2
            //
            this->Column2->HeaderText = L"Фирма";
            this->Column2->Name = L"Column2";
            //
            // Column3
            //
            this->Column3->HeaderText = L"Скорость (стр/мин)";
            this->Column3->Name = L"Column3";
            //
            // Column4
            //
            this->Column4->HeaderText = L"Цена";
            this->Column4->Name = L"Column4";
            //
            // button1
            //
            this->button1->Location = System::Drawing::Point(12, 168);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(91, 23);
            this->button1->TabIndex = 1;
            this->button1->Text = L"Запись в файл";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
            //
            // button2
            //
            this->button2->Location = System::Drawing::Point(109, 168);
            this->button2->Name = L"button2";
            this->button2->Size = System::Drawing::Size(103, 23);
            this->button2->TabIndex = 2;
            this->button2->Text = L"Чтение из файла";
            this->button2->UseVisualStyleBackColor = true;
            this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
            //
            // button3
            //
            this->button3->Location = System::Drawing::Point(218, 168);
            this->button3->Name = L"button3";
            this->button3->Size = System::Drawing::Size(238, 23);
            this->button3->TabIndex = 3;
            this->button3->Text = L"Ведомость (принтеры HP, >10 стр/мин)";
            this->button3->UseVisualStyleBackColor = true;
            this->button3->Click += gcnew System::EventHandler(this, &Form1::button3_Click);
            //
            // Form1
            //
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(469, 202);
            this->Controls->Add(this->button3);
            this->Controls->Add(this->button2);
            this->Controls->Add(this->button1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^fname;
    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 fname = "Belyaev.bin";
             }
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
             BinaryWriter ^f = gcnew BinaryWriter(File::Open(fname, FileMode::OpenOrCreate));
             f->Seek(0, SeekOrigin::End);
             try {
                 int k = dataGridView1->Rows->GetRowCount(DataGridViewElementStates::Visible);
                 for( int i = 0; i < k-1; i++ )
                 {
                     String ^type = dataGridView1[0, i]->Value->ToString();
                     String ^firm = dataGridView1[1, i]->Value->ToString();
                     int speed = Convert::ToInt32(dataGridView1[2, i]->Value);
                     double price = Convert::ToDouble(dataGridView1[3, i]->Value);
                     f->Write(type); f->Write(firm); f->Write(speed); f->Write(price);
                 }
                 dataGridView1->Rows->Clear();
                 dataGridView1->Rows->Add();
             } finally {f->Close();}
         }
private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
            if(!File::Exists(fname))
            {
                MessageBox::Show("Файл не найден!"); return;
            }
            BinaryReader ^fb = gcnew BinaryReader(File::OpenRead(fname));
            try {
                int k = 0;
                dataGridView1->Rows->Clear();
                while(fb->BaseStream->Position < fb->BaseStream->Length)
                {
                    String ^type = fb->ReadString();
                    String ^firm = fb->ReadString();
                    int speed = fb->ReadInt32();
                    double price = fb->ReadDouble();
                    dataGridView1->Rows->Add();
                    dataGridView1[0, k]->Value = type;
                    dataGridView1[1, k]->Value = firm;
                    dataGridView1[2, k]->Value = speed.ToString();
                    dataGridView1[3, k]->Value = price.ToString();
                    k++;
                }
            } finally {fb->Close();}
         }
private: System::Void button3_Click(System::Object^  sender, System::EventArgs^  e) {
             if(!File::Exists(fname))
            {
                MessageBox::Show("Файл не найден!"); return;
            }
            BinaryReader ^fb = gcnew BinaryReader(File::OpenRead(fname));
            try {
                int k = 0;
                dataGridView1->Rows->Clear();
                while(fb->BaseStream->Position < fb->BaseStream->Length)
                {
                    String ^type = fb->ReadString();
                    String ^firm = fb->ReadString();
                    int speed = fb->ReadInt32();
                    double price = fb->ReadDouble();
                    if( firm == "HP" && speed > 10 )
                    {
                        dataGridView1[0, k]->Value = type;
                        dataGridView1[1, k]->Value = firm;
                        dataGridView1[2, k]->Value = speed.ToString();
                        dataGridView1[3, k]->Value = price.ToString();
                    }
                    k++;
                }
            } finally {fb->Close();}
         }
};
}