How can I use print handler to pring a file?

autostrad · October 3rd, 2009, 05:13 PM

Hi everybody,

I need your help.

The code below is good if I want to print a sketch. The book did not show how to print a simple text file. Right now if I run this program (as is)it will show the printer dialog box. If I click OK (to print), the printer will print an empty paper. How can I use this code to print a file?

I would apprciate it if you could help.

Code:

private: System::Void printToolStripMenuItem_Click(System::Object ^  sender, System::EventArgs ^  e)
 {
// The PrintDocument holds the settings
 PrintDocument^ pdoc = gcnew PrintDocument();

// Create a dialog and attach it to the document
PrintDialog^ pd = gcnew PrintDialog();

pd->Document = pdoc;

// Show the dialog
if (pd->ShowDialog() == System::Windows::Forms::DialogResult::OK)

{
// Add the page handler

pdoc->PrintPage += gcnew PrintPageEventHandler(this,&Form1::PrintAPage);
// Print the page
pdoc->Print();

}
else
 MessageBox::Show("Print cancelled", "Information");
}

void PrintAPage(Object^ pSender, PrintPageEventArgs^ pe)
{




}

If I put the following code inside the empty function (PrintAPage)I will be ablble to draw and print what I draw. But what I need is to print an already written and saved simple text File.

Code:

Graphics* gr = pe->Graphics;
     Pen* pen1 = new Pen(Color::Black);
  
     // Draw the image
     Bitmap* bmp = new Bitmap(S"ramp1.gif");
     gr->DrawImage(bmp, 10,10);
  
     for(int i=0; i<list->Count; i++)
     {
      Line* pl = dynamic_cast<Line*>(list->get_Item(i));
      gr->DrawLine(pen1, pl->p1.X,pl->p1.Y, pl->p2.X,pl->p2.Y);
     }

autostrad · October 6th, 2009, 09:54 PM

I solved the problem. In case some one faces the same problem the solution is:

Code:

//Visual C++ Copy Code 
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::IO;
using namespace System::Drawing;
using namespace System::Drawing::Printing;
using namespace System::Windows::Forms;
public ref class PrintingExample: public System::Windows::Forms::Form
{
private:
   System::ComponentModel::Container^ components;
   System::Windows::Forms::Button^ printButton;
   System::Drawing::Font^ printFont;
   StreamReader^ streamToPrint;
public:
   PrintingExample()
      : Form()
   {
      // The Windows Forms Designer requires the following call.
      InitializeComponent();
   }

private:
   // The Click event is raised when the user clicks the Print button.
   void printButton_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      try
      {
         streamToPrint = gcnew StreamReader( "C:\\My Documents\\MyFile.txt" );
         try
         {
            printFont = gcnew System::Drawing::Font( "Arial",10 );
            PrintDocument^ pd = gcnew PrintDocument;
            pd->PrintPage += gcnew PrintPageEventHandler( this, &PrintingExample::pd_PrintPage );
            pd->Print();
         }
         finally
         {
            streamToPrint->Close();
         }
      }
      catch ( Exception^ ex ) 
      {
         MessageBox::Show( ex->Message );
      }
   }

   // The PrintPage event is raised for each page to be printed.
   void pd_PrintPage( Object^ /*sender*/, PrintPageEventArgs^ ev )
   {
      float linesPerPage = 0;
      float yPos = 0;
      int count = 0;
      float leftMargin = (float)ev->MarginBounds.Left;
      float topMargin = (float)ev->MarginBounds.Top;
      String^ line = nullptr;
      // Calculate the number of lines per page.
      linesPerPage = ev->MarginBounds.Height / printFont->GetHeight( ev->Graphics );
      // Print each line of the file.
      while ( count < linesPerPage && ((line = streamToPrint->ReadLine()) != nullptr) )
      {
         yPos = topMargin + (count * printFont->GetHeight( ev->Graphics ));
         ev->Graphics->DrawString( line, printFont, Brushes::Black, leftMargin, yPos, gcnew StringFormat );
         count++;
      }

      // If more lines exist, print another page.
      if ( line != nullptr )
            ev->HasMorePages = true;
      else
            ev->HasMorePages = false;
   }

   // The Windows Forms Designer requires the following procedure.
   void InitializeComponent()
   {
      this->components = gcnew System::ComponentModel::Container;
      this->printButton = gcnew System::Windows::Forms::Button;
      this->ClientSize = System::Drawing::Size( 504, 381 );
      this->Text = "Print Example";
      printButton->ImageAlign = System::Drawing::ContentAlignment::MiddleLeft;
      printButton->Location = System::Drawing::Point( 32, 110 );
      printButton->FlatStyle = System::Windows::Forms::FlatStyle::Flat;
      printButton->TabIndex = 0;
      printButton->Text = "Print the file.";
      printButton->Size = System::Drawing::Size( 136, 40 );
      printButton->Click += gcnew System::EventHandler( this, &PrintingExample::printButton_Click );
      this->Controls->Add( printButton );
   }
};

// This is the main entry point for the application.
int main()
{
   Application::Run( gcnew PrintingExample );
}

This code is ready to compile

Thanks

abilify · January 15th, 2010, 01:32 PM

I can see you've been doing this for some time. could you tell me how you got the code in the scroll boxes? I would be most appreciative.

jminatel · January 15th, 2010, 02:16 PM

Use the "code" tag. :)
Please see the FAQ: http://p2p.wrox.com/faq.php

abilify · January 15th, 2010, 02:48 PM

Code:

<script type="text/javascript">
<!--
    alert("Thanks for your help!");
//-->
</script>

autostrad · January 16th, 2010, 06:16 PM

There is a question there, which is not directed to anyone. In case it was for me. I got the code from many participants just like you and me from different forums.