How to insert images of picture box which is created by for loop?

If user enters 5 this loop creates 5 pictureboxes

        int.TryParse(text10.Text, out int a);

        for (i = 0; i < a; ++i)
        {
            PictureBox pb = new PictureBox();
            pb.Name = ("pic" + (i + 1)).ToString();
            pb.Location = new Point(100, 150 + (850 * i));////this (850 * i)
            Size picsize = new Size(800, 800);
            pb.Size = picsize;
            pb.BorderStyle = BorderStyle.FixedSingle;
            pb.SizeMode = PictureBoxSizeMode.StretchImage;
            pb.Click += clickonimage;
            pb.Cursor = Cursors.Hand;
            this.Controls.Add(pb);
        }

Here I have a click event for selecting image of each picture box

My question is…

How can I insert those images of pictureBoxes into SQL SERVER at once?

can anyone help ?

appreciate it.

Answer

If you have 5 picture boxes in your application and in your database table there are 5 columns to store image data then do as following demo code does

var pictureBoxNames = Enumerable
    .Range(1, 5)
    .Select(i => "pic" + i);
PictureBox[] pictureBoxes = Controls
    .OfType<PictureBox>()
    .Where(p => pictureBoxNames.Contains(p.Name))
    .ToArray();
var builder = new SqlConnectionStringBuilder()
{
    DataSource = "MyServerAddress", //your server name
    InitialCatalog = "DataTable1"   //your data table name
};
using (var sqlConnection = new SqlConnection(builder.ConnectionString))
{
    sqlConnection.Open();
    var columns = string.Join(", ", pictureBoxNames.Select(s => $"[{s}]"));
    var pars = string.Join(", ", pictureBoxNames.Select(s => $"@{s}"));
    //Replace 'Table1' with your data table name here
    string commandText = $"INSERT INTO [Table1] ({columns}) VALUES ({pars})";
    using (var insertCommand = new SqlCommand(commandText, sqlConnection))
    {
        var imageConverter = new ImageConverter();
        Func<Image, object> ToByteArray = img
            => imageConverter.ConvertTo(img, typeof(byte[]));

        var ps = pictureBoxes
            .Select(p => new SqlParameter($"@{p.Name}", ToByteArray(p.Image)))
            .ToArray();
        insertCommand.Parameters.AddRange(ps);
        insertCommand.ExecuteNonQuery();
    }
}