Cannot show print dialog on the top of asp.net web

问题:

I am currently using System.Windows.Forms.PrintDialog on a custom control in ASP.net because I want to show the print dialog and assign its PrinterSettings to ReportPrintDocument.PrinterSettings after I click Ok button on the dialog. Here is my code:

using (PrintDialog printDialog = new PrintDialog())
                {
                   if (printDialog.ShowDialog() == DialogResult.OK)
                    {
                        ReportPrintDocument rp = new ReportPrintDocument(rvPermit.ServerReport);
                        rp.PrinterSettings = printDialog.PrinterSettings;
                        rp.Print();
                    }
                }

My problem is that the print dialog always show behind the web browser and I couldn't know that it is showing or not until I minimize the web browser.

Do you know how to show the print dialog on the top of a web form? Please help.

回答1:

Here is my solution for now. (Not recommended) If you can find another one, please share it to me and I'm very appreciate your help on that.

1. initialize a new window form Form currentForm = new Form();

2. show the form currentForm.Show();

3. Activate the form currentForm.Activate();

4. Set its TopMost to true, so it will bring the form to the top currentForm.TopMost = true;

5. Set it to be Focus currentForm.Focus()

6. set the form.visible = false currentForm.Visible = false;

7. start to show the print dialog printDialog.ShowDialog(currentForm)

8. close the new form currentForm.Close();

      try
           {
   
             using (PrintDialog printDialog = new PrintDialog())
               {
                   ReportPrintDocument rp = new ReportPrintDocument(rvPermit.ServerReport);
   
                   Form currentForm = new Form();
                   currentForm.Show();
                   currentForm.Activate();
                   currentForm.TopMost = true;
                   currentForm.Focus();
                   currentForm.Visible = false;
   
               if (printDialog.ShowDialog(currentForm) == DialogResult.OK)
               {
                   if (PrintReport != null)
                       PrintReport(this, e);
   
                   rp.PrinterSettings = printDialog.PrinterSettings;
                   rp.Print();
               }
   
               currentForm.Close();
           }
       }
       catch (Exception)
       {
           // Prevent any error while calling the printer dialog
       }