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The web form printing class has two routines. The first, PageCreate, takes two inputs the name of the printer and the title to printed at the top of the page. This routine creates a page (string) with line breaks that contain each field and it's value. It also creates a string that is sent to a results page. The second routine, PagePrint, prints the page one line at a time.
using System;
using System.Drawing;
using System.Drawing.Printing;
using System.Text;
using System.Web;
using System.IO;
namespace CsXml.FormPrint
{
public class WebPrinting
{
protected StringReader stringToPrint;
protected Font printFont;
public WebPrinting()
{
}
public void PageCreate(string printerName, string pageTitle)
{
StringBuilder sb = new StringBuilder();
string qs = "";
try
{
// start creating page with title and date/time
sb.Append(pageTitle + "\n\n");
sb.Append("DateTime: " + DateTime.Now.ToString()+ "\n\n");
string fieldValue;
// iterate submitted form fields, also gets field name
foreach ( string fieldName in HttpContext.Current.Request.Form )
{
// exclude viewstate and submit button
if (fieldName == "__VIEWSTATE" || fieldName == "Submit"){}
else
{
// get the field value
fieldValue = HttpContext.Current.Request.Form[fieldName] ;
// builds the querystring for results.aspx
qs = qs + "&" + fieldName + "=" + fieldValue;
// adds the field name and value to the page
// breaks the field value into 50 character segments so it will fit on the paper
// this example only accounts for fields of l50 characters or less
// issue: breaks in the middle of words instead of at spaces
if (fieldValue.Length > 100)
{
sb.Append(fieldName + ": " + fieldValue.Substring(0,50) + "\n");
sb.Append(" " + fieldValue.Substring(50,50) + "\n");
sb.Append(" " + fieldValue.Substring(100,fieldValue.Length - 100) + "\n");
}
else if(fieldValue.Length > 50)
{
sb.Append(fieldName + ": " + fieldValue.Substring(0,50) + "\n");
sb.Append(" " + fieldValue.Substring(50,fieldValue.Length - 50) + "\n");
}
else
{
sb.Append(fieldName + ": " + fieldValue + "\n");
}
}
}
// place stringbuilder in string reader
stringToPrint = new StringReader(sb.ToString());
// set font and size here
printFont = new Font("Arial", 12);
PrintDocument doc = new PrintDocument();
// set the printer name
doc.PrinterSettings.PrinterName = printerName;
// add print page event handler
doc.PrintPage += new PrintPageEventHandler(this.PagePrint);
// print the page
doc.Print();
// adds status to querystring
qs = "Results.aspx?" + qs.Substring(1,qs.Length-1) + "&Status=Success";
}
catch
{
qs = "Results.aspx?Status=Failed";
}
finally
{
stringToPrint.Close() ;
}
// redirects to result.aspx
HttpContext.Current.Response.Redirect(qs);
}
private void PagePrint(object sender, PrintPageEventArgs e)
{
float linesPerPage = 0 ;
float linePosition = 0 ;
int lineCount = 0 ;
float leftMargin = e.MarginBounds.Left;
float topMargin = e.MarginBounds.Top;
String line=null;
// gets the number of lines per page
linesPerPage = e.MarginBounds.Height / printFont.GetHeight(e.Graphics) ;
// iterate lines in string
while (lineCount < linesPerPage && ((line=stringToPrint.ReadLine()) != null))
{
// set line postion from top margin
linePosition = topMargin + (lineCount * printFont.GetHeight(e.Graphics));
// print line
e.Graphics.DrawString (line, printFont, Brushes.Black, leftMargin,linePosition,
new StringFormat());
lineCount++;
}
// are there more lines?
if (line != null)
e.HasMorePages = true ;
else
e.HasMorePages = false ;
}
}
}
