First of all, i have 13 image buttons in a page and I defined their ids like image_1, image_2, image_3….

In my database, I hold image IDs and images like in photo.

All image buttons are empty in visual studio designer rn.

So here’s my code:

protected void PlaceImages()
        {
            string query = "SELECT imageID, image FROM images WHERE imageID BETWEEN 1 AND 13";

            using (MySqlConnection connection = ConnectDB())
            {
                connection.Open();
                using (MySqlCommand cmd = new MySqlCommand(query, connection))
                {
                    using (MySqlDataReader dr = cmd.ExecuteReader())
                    {
                        while (dr.Read())
                        {
                            int imageID = Convert.ToInt32(dr["imageID"]);
                            byte[] imgData = (byte[])dr["image"];
                            string base64String = Convert.ToBase64String(imgData, 0, imgData.Length);

                            string controlID = "image_" + imageID;
                            ImageButton imgButton = (ImageButton)FindControl(controlID);

                            imgButton.ImageUrl = "data:image/png;base64," + base64String;
                        }
                    }
                }
            }
        }

I get this error: imgButton was null.
in this row: imgButton.ImageUrl = “data:image/png;base64,” + base64String;

How can I solve this problem?

I tried to put this row “imgButton.ImageUrl = “data:image/png;base64,” + base64String;” in an if statement to check if its not null. But this time, nothing changed in my image buttons.