Save image in directory without Savefiledialog

Question

I am developing a stock control application and in this application there is a product registration screen:

The images of the products are being saved in the Mysql database. I received some tips and among them was that it is not recommended to save images in the database, even because the field of product search on the query screen was too slow, because the image is converted to byte as follows:

public void CarregaImagem(String imgCaminho)
    {
        try
        {
            if (string.IsNullOrEmpty(imgCaminho))
                return;
            //fornece propriedadese métodos de instância para criar, copiar,
            //excluir, mover, e abrir arquivos, e ajuda na criação de objetos FileStream
            FileInfo arqImagem = new FileInfo(imgCaminho);
            //Expõe um Stream ao redor de um arquivo de suporte
            //síncrono e assíncrono operações de leitura e gravar.
            FileStream fs = new FileStream(imgCaminho, FileMode.Open, FileAccess.Read, FileShare.Read);
            //aloca memória para o vetor
            this.ProFoto = new byte[Convert.ToInt32(arqImagem.Length)];
            //Lê um bloco de bytes do fluxo e grava osdados em um buffer fornecido.
            int iBytesRead = fs.Read(this.ProFoto, 0, Convert.ToInt32(arqImagem.Length));
            fs.Close();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message.ToString());
        }
    }

And saved on the seat as follows:

public void Incluir(ModeloProduto obj)
    {    
        MySqlCommand cmd = new MySqlCommand();
        cmd.Connection = conexao.ObjetoConexao;
        cmd.CommandText = "insert into Produto (pro_foto) " +
        "values (@foto); select @@IDENTITY;";
        cmd.Parameters.Add("@foto", MySqlDbType.LongBlob);
        if (obj.ProFoto == null)
        {
            //cmd.Parameters.AddWithValue("@pro_foto", DBNull.Value);
            cmd.Parameters["@foto"].Value = DBNull.Value;
        }
        else
        {
            //cmd.Parameters.AddWithValue("@pro_foto", obj.pro_foto);
            cmd.Parameters["@foto"].Value = obj.ProFoto;
        }
    }

On the query screen, the image is passed from the database to Picturebox when the user enters the product’s name or barcode. But I’d like to change that. Instead of saving the image in the database, when the user registers a product and clicks to save, the image is automatically passed from the Picturebox of the registration screen, to a directory inside the program folder and when doing a search on the query screen, the image to be recovered from the directory for Picturebox. The image also be saved with the product code number at the time of registration.

"Add Photo" button from the registration screen:

private void btLoFoto_Click(object sender, EventArgs e)
    {
        try
        {
            OpenFileDialog od = new OpenFileDialog();
            od.ShowDialog();
            if (!string.IsNullOrEmpty(od.FileName))
            {
                this.foto = od.FileName;
                pbFoto.Load(this.foto);
            }
        }
        catch 
        {
            MessageBox.Show("Algum erro ocorreu! Você pode estar tentando enviar outros tipos de arquivos \n" 
                + "que não são imagens, selecione arquivos do tipo .png, .jpg, .bitmap,  por exemplo.", "Erro");
        }
    }

Product consultation screen:

Code to recover bank image:

try
                {
                    MemoryStream ms = new MemoryStream(modelo.ProFoto);
                    pbFoto.Image = Image.FromStream(ms);
                    this.foto = "Foto Original";
                }
                catch { }

Class Modeloproduct:

public ModeloProduto(String pro_foto)
       {
           this.CarregaImagem(pro_foto);
       }
public ModeloProduto(byte[] pro_foto)
       {
           this.ProFoto = pro_foto;
       }
private byte[] _pro_foto;
        public byte[] ProFoto
        {
            get { return this._pro_foto; }
            set { this._pro_foto = value; }
        }

public void CarregaImagem(String imgCaminho)
        {
            try
            {
                if (string.IsNullOrEmpty(imgCaminho))
                    return;
                //fornece propriedadese métodos de instância para criar, copiar,
                //excluir, mover, e abrir arquivos, e ajuda na criação de objetos FileStream
                FileInfo arqImagem = new FileInfo(imgCaminho);
                //Expõe um Stream ao redor de um arquivo de suporte
                //síncrono e assíncrono operações de leitura e gravar.
                FileStream fs = new FileStream(imgCaminho, FileMode.Open, FileAccess.Read, FileShare.Read);
                //aloca memória para o vetor
                this.ProFoto = new byte[Convert.ToInt32(arqImagem.Length)];
                //Lê um bloco de bytes do fluxo e grava osdados em um buffer fornecido.
                int iBytesRead = fs.Read(this.ProFoto, 0, Convert.ToInt32(arqImagem.Length));
                fs.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message.ToString());
            }
        }

Answer 1

As long as Picturebox contains a valid image, you can recover it using the property Image of the component and save it using the method Image.Save()

private void SalvarImagem()
{
    pictureBox1.Image.Save("D:\\teste.jpg", pictureBox1.Image.RawFormat);
}

Note that the second parameter of the method Save asks for a ImageFormat (image type - JPG, PNG, etc.), as this information already exists in the image it is possible to recover it without much effort using the property RawFormat.

Yes, that’s it! Of course you’ll need to do something to put the extension in the file name, but that’s just a small detail.

---

To find a particular file in a specific directory, you must use Directory.GetFiles(). I created a small example for you, obviously you have to adapt to your needs, but the basis is this.

public Image buscarImagemProduto(string pastaPadrao, string nomeUnicoArquivo)
{
    string[] arquivos = Directory.GetFiles(pastaPadrao, nomeUnicoArquivo);

    if(arquivos.Length > 1)
        MaisDeUmArquivoEncontrado();
    else if (arquivos.Length == 0)
        NenhumArquivoEncontrado();
    else
        return Image.FromFile(arquivo[0]);

    return null; // Qtd de arquivos é diferente de zero - adapte para suas necessidades
}

Answer 2

If it is a windows Forms application, the image already exists on the user’s pc, then to write you can simply copy the file to your folder, already renaming, using the Copy function of the File class (https://msdn.microsoft.com/en-us/library/c6cfw35a(v=vs.100). aspx).

To read, you can use the Readallbytes function of the same class (https://msdn.microsoft.com/en-us/library/system.io.file.readallbytes(v=vs.100). aspx) instead of loading from the database.