Asp – If Statement Not Working as Expected in ASP Classic

An excellent tool to use when troubleshooting these types of issues is Fiddler. It will show you the calls and responses directly bewtween your web browser and the server. It works out of the box with IE and FireFox support is just a config setting away.

I'ver personally used Fiddler to track down image load issues, CSS problems, caching issues, redirect errors, and even have used it to tamper with URL variables to try breaking/hacking my sites.

Fiddler Website

you can try like this...

[STAThread]
  static void Main() 
  {
    Application.Run(new PrintPreviewDialog());
  }

  private void btnOpenFile_Click(object sender, System.EventArgs e)
  {
    openFileDialog.InitialDirectory = @"c:\";
    openFileDialog.Filter = "Text files (*.txt)|*.txt|" +
            "All files (*.*)|*.*";
    openFileDialog.FilterIndex = 1;              //  1 based index

    if (openFileDialog.ShowDialog() == DialogResult.OK)
    {
      StreamReader reader = new StreamReader(openFileDialog.FileName);
      try
      {
        strFileName = openFileDialog.FileName;
        txtFile.Text = reader.ReadToEnd();
      }
      catch (Exception ex)
      {
        MessageBox.Show(ex.Message);
        return;
      }
      finally
      {
        reader.Close();
      }
    }
  }

  private void btnSaveFile_Click(object sender, System.EventArgs e)
  {
    SaveFileDialog sfd = new SaveFileDialog();
    sfd.InitialDirectory = @"c:\";
    sfd.Filter = "Text files (*.txt)|*.txt|" +
            "All files (*.*)|*.*";
    sfd.FilterIndex = 1;              //  1 based index

    if (strFileName != null)
      sfd.FileName = strFileName;
    else
      sfd.FileName = "*.txt";

    if (sfd.ShowDialog() == DialogResult.OK)
    {
      StreamWriter writer = new StreamWriter(strFileName,false);
      try
      {
        strFileName = sfd.FileName;
        writer.Write(txtFile.Text);
      }
      catch(Exception ex)
      {
        MessageBox.Show(ex.Message);
        return;
      }
      finally
      {
        writer.Close();
      }
    }
  }

//here you can print form as text file by clicking on the button..

  private void btnPageSetup_Click(object sender, System.EventArgs e)
  {
    PageSetupDialog psd = new PageSetupDialog();
    psd.Document = printDocument;
    psd.ShowDialog();
  }

  private void btnPrint_Click(object sender, System.EventArgs e)
  {
    PrintDialog pdlg = new PrintDialog();
    pdlg.Document = printDocument;

    if (pdlg.ShowDialog() == DialogResult.OK)
    {
      try
      {
        printDocument.Print();
      }
      catch(Exception ex)
      {
        MessageBox.Show("Print error: " + ex.Message);
      }
    }
  }

  private void btnPrintPreview_Click(object sender, System.EventArgs e)
  {
    PrintPreviewDialog ppdlg = new PrintPreviewDialog();
    ppdlg.Document = printDocument;
    ppdlg.ShowDialog();
  }

  private void pdPrintPage(object sender, PrintPageEventArgs e)
  {
    float linesPerPage = 0;
    float verticalOffset = 0;
    float leftMargin = e.MarginBounds.Left;
    float topMargin = e.MarginBounds.Top;
    int linesPrinted = 0;
    String strLine = null;

    linesPerPage = e.MarginBounds.Height / currentFont.GetHeight(e.Graphics);

    while (linesPrinted < linesPerPage &&
        ((strLine = stringReader.ReadLine())!= null ))
    {
      verticalOffset = topMargin + (linesPrinted * currentFont.GetHeight(e.Graphics));
      e.Graphics.DrawString(strLine, currentFont, Brushes.Black, leftMargin, verticalOffset);
      linesPrinted++;
    }

    if (strLine != null)
      e.HasMorePages = true;
    else
      e.HasMorePages = false;

  }

  private void pdBeginPrint(object sender, PrintEventArgs e)
  {
    stringReader = new StringReader(txtFile.Text);
    currentFont = txtFile.Font;
  }

  private void pdEndPrint(object sender, PrintEventArgs e)
  {
    stringReader.Close();
    MessageBox.Show("Done printing.");
  }
}