PictureBox visible property does not work... help please

Question

I am using window app and C#.. i have a picture which is invisible at the start of the app.. when some button is clicked, the picture box has to be shown..

i use this coding but the picture box is not visible

private void save_click(object sender, EventArgs e)

{

      pictureBox1.Visible = true;
      pictureBox1.Show();

      //does the work here 
      //storing and retreiving values from datadase

     pictureBox1.Visible = false;
     pictureBox1.Hide();
}

P.S... in the picture box i am showing a gif.. so the user will know that some work is going on in the background.. It will take long time for the function to finish...

Answer 1

Assuming that the saving to the database takes some time, you should be doing it asynchronously using BackgroundWorker, hiding your PictureBox once the operation completes.

The reason that the image is not showing currently is because while your long-running save operation is occurring, Windows messages are not being processed, and so your form will be unresponsive to user input and not perform repaints. When the save operation finishes, and messages start being processed again, the picture box has already been hidden again.