C
C#•3d ago
Lupusregina Beta

Doing a print preview makes my form disappear

Hi! I have a label designer form and when I hit the preview button, my form disappears and another form in my application is visible. It's like the label designer form gets minimized. It's driving me nuts, lol Problem shown: https://www.youtube.com/watch?v=4dH4FRoBDHg Code: 
   private void RenderLabel() {
      if (activeDocument == null) return;
      if (activeDocument.PrinterId == Guid.Empty) {
        if (lblPrinter.SelectedIndex > -1) {
          activeDocument.Printer = lblPrinter.SelectedItem is Printer prt ? prt : null;
          activeDocument.PrinterId = activeDocument.Printer?.Id ?? Guid.Empty;
        } else {
          Dialog($"Set the printer first!");
          return;
        }
      }

      isPreview = true;
      SaveComponent(false);
      activeDocument.Product = loadedProduct.Tag is Product prod ? prod : null;
      activeDocument.Store = loadedStore.Tag is Store store ? store : null;
      activeDocument.Customer = loadedCustomer.Tag is Customer cust ? cust : null;
      var ps = printDoc.DefaultPageSettings;
      ps.Margins = activeDocument.Margins;
      activeDocument.Dpi = activeDocument.Printer?.Dpi ?? 300f;
      if (activeDocument.PaperSize.Width > 0 && activeDocument.PaperSize.Height > 0) {
        int w = (int)Math.Round(activeDocument.PaperSize.Width * 100f / activeDocument.Dpi);
        int h = (int)Math.Round(activeDocument.PaperSize.Height * 100f / activeDocument.Dpi);
        ps.PaperSize = new PaperSize("Custom", Math.Max(w, 1), Math.Max(h, 1));
      }

      preview.Document = printDoc;
      preview.InvalidatePreview();
      Show();
      Activate();
      WindowState = FormWindowState.Maximized;
      ActiveControl = labels;
    }
   private void RenderLabel() {
      if (activeDocument == null) return;
      if (activeDocument.PrinterId == Guid.Empty) {
        if (lblPrinter.SelectedIndex > -1) {
          activeDocument.Printer = lblPrinter.SelectedItem is Printer prt ? prt : null;
          activeDocument.PrinterId = activeDocument.Printer?.Id ?? Guid.Empty;
        } else {
          Dialog($"Set the printer first!");
          return;
        }
      }

      isPreview = true;
      SaveComponent(false);
      activeDocument.Product = loadedProduct.Tag is Product prod ? prod : null;
      activeDocument.Store = loadedStore.Tag is Store store ? store : null;
      activeDocument.Customer = loadedCustomer.Tag is Customer cust ? cust : null;
      var ps = printDoc.DefaultPageSettings;
      ps.Margins = activeDocument.Margins;
      activeDocument.Dpi = activeDocument.Printer?.Dpi ?? 300f;
      if (activeDocument.PaperSize.Width > 0 && activeDocument.PaperSize.Height > 0) {
        int w = (int)Math.Round(activeDocument.PaperSize.Width * 100f / activeDocument.Dpi);
        int h = (int)Math.Round(activeDocument.PaperSize.Height * 100f / activeDocument.Dpi);
        ps.PaperSize = new PaperSize("Custom", Math.Max(w, 1), Math.Max(h, 1));
      }

      preview.Document = printDoc;
      preview.InvalidatePreview();
      Show();
      Activate();
      WindowState = FormWindowState.Maximized;
      ActiveControl = labels;
    }
I threw a bunch of stuff there at the end trying to bring the form back, but none of that makes any difference. Any suggestions on what I can try?
Strahan740i
YouTube
Focus problem
1 Reply
Zendist
Zendist•3d ago
Did you try commenting out everything in RenderLabel? Try to comment out parts of the code until you find the culprit :).

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