public class PrintingExample { private Font printFont; private StreamReader streamToPrint; static string filePath; public PrintingExample() { Printing(); } // The PrintPage event is raised for each page to be printed. private void pd_PrintPage(object sender, PrintPageEventArgs ev) { float linesPerPage = 0; float yPos = 0; int count = 0; float leftMargin = ev.MarginBounds.Left; float topMargin = ev.MarginBounds.Top; String line=null;
// Calculate the number of lines per page. linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics) ; // Iterate over the file, printing each line. while (count < linesPerPage && ((line=streamToPrint.ReadLine()) != null)) { yPos = topMargin + (count * printFont.GetHeight(ev.Graphics)); ev.Graphics.DrawString (line, printFont, Brushes.Black, leftMargin, yPos, new StringFormat()); count++; } // If more lines exist, print another page. if (line != null) ev.HasMorePages = true; else ev.HasMorePages = false; } // Print the file. public void Printing() { try { streamToPrint = new StreamReader (filePath); try { printFont = new Font("Arial", 10); PrintDocument pd = new PrintDocument(); pd.PrintPage += new PrintPageEventHandler(pd_PrintPage); // Print the document. pd.Print(); } finally { streamToPrint.Close() ; } } catch(Exception ex) { MessageBox.Show(ex.Message); } }
// This is the main entry point for the application. public static void Main(string[] args) { string sampleName = Environment.GetCommandLineArgs()[0]; if(args.Length != 1) { Console.WriteLine("Usage: " + sampleName +" <file path>"); return; } filePath = args[0]; new PrintingExample(); } }
Graphics
再通过这个Graphics.GetHdc()
{
private Font printFont;
private StreamReader streamToPrint;
static string filePath;
public PrintingExample()
{
Printing();
} // The PrintPage event is raised for each page to be printed.
private void pd_PrintPage(object sender, PrintPageEventArgs ev)
{
float linesPerPage = 0;
float yPos = 0;
int count = 0;
float leftMargin = ev.MarginBounds.Left;
float topMargin = ev.MarginBounds.Top;
String line=null;
// Calculate the number of lines per page.
linesPerPage = ev.MarginBounds.Height /
printFont.GetHeight(ev.Graphics) ; // Iterate over the file, printing each line.
while (count < linesPerPage &&
((line=streamToPrint.ReadLine()) != null))
{
yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));
ev.Graphics.DrawString (line, printFont, Brushes.Black,
leftMargin, yPos, new StringFormat());
count++;
} // If more lines exist, print another page.
if (line != null)
ev.HasMorePages = true;
else
ev.HasMorePages = false;
} // Print the file.
public void Printing()
{
try
{
streamToPrint = new StreamReader (filePath);
try
{
printFont = new Font("Arial", 10);
PrintDocument pd = new PrintDocument();
pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
// Print the document.
pd.Print();
}
finally
{
streamToPrint.Close() ;
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
// This is the main entry point for the application.
public static void Main(string[] args)
{
string sampleName = Environment.GetCommandLineArgs()[0];
if(args.Length != 1)
{
Console.WriteLine("Usage: " + sampleName +" <file path>");
return;
}
filePath = args[0];
new PrintingExample();
}
}
我用 ev.HasMorePages = false 但是还是打了,有没有让它停止打印的语句
我用
ev.Graphics.GetHdc();
中间给那个控件的hdc附值,结果没有效果
ev.Graphics.ReleaseHdc((hDc);
但我用VB的hdc属性负值后就可以打印,不知道原因???
调用beginpaint api
来获得hdc
HDC BeginPaint(
HWND hwnd, // handle to window
LPPAINTSTRUCT lpPaint // paint information
);
beginPaint()
是windows api