Change the picturebox to a randome one once i clicked the button

[Alex Matei]

Hi there.
I have learned structural programming , for a while now, I started to learn OOP, so i'm still newbie in this field, please excuse me if it is too simple, but i can not do it. Can you guys help me ?
So, i have made a UI, which will display a image, and when I press the button below , it should switch to another one ( randomly), I have searched the whole internet but i've found nothing clear that should have helped me.
This is the display :




https://i.gyazo.com/3df7b40264dc9d18...c35b3ecb80.png
And this is the folder where the pictures should come from:
https://i.gyazo.com/491abb6c40eba638...27021f864c.png
Ok, and this is the code of the functions for the image and the button ( btw the names of the boxes are standard, i've not modified any of them ).
My code :

#pragma once

namespace speranta {

    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 MyForm
    /// </summary>
    public ref class MyForm : public System::Windows::Forms::Form
    {
    public:
        MyForm(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~MyForm()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::PictureBox^  pictureBox1;
    protected:
    private: System::Windows::Forms::Button^  button1;


    protected:


    protected:

    protected:

    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)
        {
            System::ComponentModel::ComponentResourceManager^  resources = (gcnew System::ComponentModel::ComponentResourceManager(MyForm::typeid));
            this->pictureBox1 = (gcnew System::Windows::Forms::PictureBox());
            this->button1 = (gcnew System::Windows::Forms::Button());
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->BeginInit();
            this->SuspendLayout();
            // 
            // pictureBox1
            // 
            this->pictureBox1->Image = (cli::safe_cast<System::Drawing::Image^>(resources->GetObject(L"pictureBox1.Image")));
            this->pictureBox1->Location = System::Drawing::Point(9, 12);
            this->pictureBox1->Name = L"pictureBox1";
            this->pictureBox1->Size = System::Drawing::Size(747, 419);
            this->pictureBox1->SizeMode = System::Windows::Forms::PictureBoxSizeMode::StretchImage;
            this->pictureBox1->TabIndex = 0;
            this->pictureBox1->TabStop = false;
            this->pictureBox1->Click += gcnew System::EventHandler(this, &MyForm::pictureBox1_Click);
            // 
            // button1
            // 
            this->button1->Location = System::Drawing::Point(299, 456);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(153, 34);
            this->button1->TabIndex = 1;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
            // 
            // MyForm
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(8, 16);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(768, 497);
            this->Controls->Add(this->button1);
            this->Controls->Add(this->pictureBox1);
            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();
            this->ResumeLayout(false);

        }
#pragma endregion
    private: System::Void MyForm_Load(System::Object^  sender, System::EventArgs^  e) {
        // the main window function
    }
    private: System::Void pictureBox1_Click(System::Object^  sender, System::EventArgs^  e) {
        // the picutebox function
    }
    private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
        // the button function
    }
    };
}

if you need, those are the proprieties for each :
https://i.gyazo.com/6acc30a1b5d99b5e...cde60ffec6.png
https://i.gyazo.com/3760e2fea6b3ee66...5dff7fb13a.png



Thank you...

[OldGuy2]

You can divide this task into two sub-tasks.
First is to read all the filenames from the image directory and store them in an array or list - best time is in the form load event
Second you create a random number, pick the filename from the array or list and assign a new image to the pictute box - when the button is clicked

For the first part use Directory::GetFiles method
Directory.GetFiles Method (String) (System.IO)

[Alex Matei]

You can divide this task into two sub-tasks.
First is to read all the filenames from the image directory and store them in an array or list - best time is in the form load event
Second you create a random number, pick the filename from the array or list and assign a new image to the pictute box - when the button is clicked

For the first part use Directory::GetFiles method
Directory.GetFiles Method (String) (System.IO)

Ok, I modified it but every time there is a error... I know this is not a big deal but I've tried everything for hours now...
Can you please modify my code from above ( the last 3 function from the button of the code ) , with the code you gave me.
My photos directory is : C:\Users\Alex\Desktop\POO\geo\photoss , and the photos are : 1.png, 2.jpg,3.jpg.
That would be very helpful, thank you again.

[OldGuy2]

OK, here it is:
Try if you can run it after changing line 108 with your pic path.

#pragma once
 
namespace speranta 
{
    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections::Generic;
    using namespace System::Windows::Forms;
    using namespace System::IO;
    using namespace System::Drawing;
 
    /// <summary>
    /// Summary for MyForm
    /// </summary>
    public ref class MyForm : public System::Windows::Forms::Form
    {
      String^ mPicPath;
      List<String^> ^mPicNames; 
      Random^ mRandom;
    public:
        MyForm(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }
 
    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~MyForm()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::PictureBox^  pictureBox1;
    protected:
    private: System::Windows::Forms::Button^  button1;
 
 
    protected:
 
 
    protected:
 
    protected:
 
    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->pictureBox1 = (gcnew System::Windows::Forms::PictureBox());
          this->button1 = (gcnew System::Windows::Forms::Button());
          (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->pictureBox1))->BeginInit();
          this->SuspendLayout();
          // 
          // pictureBox1
          // 
          this->pictureBox1->Location = System::Drawing::Point(9, 12);
          this->pictureBox1->Name = L"pictureBox1";
          this->pictureBox1->Size = System::Drawing::Size(747, 419);
          this->pictureBox1->SizeMode = System::Windows::Forms::PictureBoxSizeMode::Zoom;
          this->pictureBox1->TabIndex = 0;
          this->pictureBox1->TabStop = false;
          this->pictureBox1->Click += gcnew System::EventHandler(this, &MyForm::pictureBox1_Click);
          // 
          // button1
          // 
          this->button1->Location = System::Drawing::Point(299, 456);
          this->button1->Name = L"button1";
          this->button1->Size = System::Drawing::Size(153, 34);
          this->button1->TabIndex = 1;
          this->button1->Text = L"button1";
          this->button1->UseVisualStyleBackColor = true;
          this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
          // 
          // MyForm
          // 
          this->AutoScaleDimensions = System::Drawing::SizeF(8, 16);
          this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
          this->ClientSize = System::Drawing::Size(768, 497);
          this->Controls->Add(this->button1);
          this->Controls->Add(this->pictureBox1);
          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();
          this->ResumeLayout(false);

        }
#pragma endregion
    private: 
      System::Void MyForm_Load(System::Object^  sender, System::EventArgs^  e) 
      {
        mPicPath = "E:\\Bilder\\";
        mPicNames = gcnew List<String^>;
        array<String^> ^tmp = Directory::GetFiles(mPicPath, "*.png");
        mPicNames->AddRange(tmp);
        tmp = Directory::GetFiles(mPicPath, "*.jpg");
        mPicNames->AddRange(tmp);
        if (mPicNames->Count == 0)
        {
          MessageBox::Show("No pics loaded");
          return;
        } 
        mRandom = gcnew Random();
        pictureBox1->Image = Image::FromFile(mPicNames[0]);
      }
    private: 
      System::Void pictureBox1_Click(System::Object^  sender, System::EventArgs^  e) 
      {
        // What shall happen here ??
      }
    private: 
      System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) 
      {
        int idx = mRandom->Next(mPicNames->Count);
        pictureBox1->Image = Image::FromFile(mPicNames[idx]);
      }
    };
}

BTW Hre are some tutorials you might want to look at.
Microsoft Visual C++/CLI Programming
YouTube

[Alex Matei]

OK, here it is:
Try if you can run it after changing line 108 with your pic path.
---
---

BTW Hre are some tutorials you might want to look at.
Microsoft Visual C++/CLI Programming
YouTube

Thank you maaaaan... It was not working the first time, but I fixed it. And after that made one more button , which will show another picture which will kinda liked to the first one, from another folder. Anyway, you're code lightened my way. Thank you a lot.