Using this class, one simply has to issue the following on any form to print the contents of the active window:
Code: Select all
public PrintWindow printWindow;
public void butPrint_Click(object sender,EventArgs e) {
printWindow = new PrintWindow();
printWindow.Print(this.Handle);
}Thanks.
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Here is the class:
Code: Select all
using System;
using System.Collections.Generic;
using System.Data;
using System.Text;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.Collections;
using System.ComponentModel;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Microsoft.Win32;
using OpenDental.DataAccess;
using OpenDentBusiness;
using CodeBase;
using System.IO;
namespace OpenDentBusiness{
public class PrintWindow {
///<summary>Prints the contents of the active window</summary>
//
//Variables used for printing functionality..
//
public PrintDialog printDialog;
public System.IO.Stream streamToPrint;
public FileStream fileStream;
public PrintDocument printDocument;
public IntPtr thisHandle;
public string streamType;
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
public static extern bool BitBlt(
IntPtr hdcDest, // handle to destination DC
int nXDest, // x-coord of destination upper-left corner
int nYDest, // y-coord of destination upper-left corner
int nWidth, // width of destination rectangle
int nHeight, // height of destination rectangle
IntPtr hdcSrc, // handle to source DC
int nXSrc, // x-coordinate of source upper-left corner
int nYSrc, // y-coordinate of source upper-left corner
System.Int32 dwRop); // raster operation code
public void printDocument_PrintPage(object sender, PrintPageEventArgs e){
System.IO.StreamReader streamReader = new StreamReader(this.streamToPrint);
System.Drawing.Image image = System.Drawing.Image.FromStream(this.streamToPrint);
int x = e.MarginBounds.X;
int y = e.MarginBounds.Y;
int width = image.Width;
int height = image.Height;
if ((width / e.MarginBounds.Width) > (height / e.MarginBounds.Height))
{
width = image.Width * e.MarginBounds.Width / image.Width;//e.MarginBounds.Width;
height = image.Height * e.MarginBounds.Width / image.Width;
}
else
{
width = image.Width * e.MarginBounds.Width / image.Height;
height = e.MarginBounds.Height;
}
System.Drawing.Rectangle destRect = new System.Drawing.Rectangle(x, y, width, height);
e.Graphics.DrawImage(image, destRect, 0, 0, image.Width,image.Height,System.Drawing.GraphicsUnit.Pixel);
}
public void Print(IntPtr thisHandle){
CaptureWindowToFile(thisHandle, @"C:\\PrintPage.jpg", System.Drawing.Imaging.ImageFormat.Jpeg) ;
FileStream fileStream = new FileStream(@"c:\PrintPage.jpg", FileMode.Open, FileAccess.Read);
StartPrint(fileStream,"Image");
fileStream.Close();
if (System.IO.File.Exists(@"c:\PrintPage.jpg"))
{
System.IO.File.Delete(@"c:\PrintPage.jpg");
}
}
public void StartPrint(Stream streamToPrint, string streamType){
printDocument = new PrintDocument();
this.printDocument.PrintPage += new PrintPageEventHandler(printDocument_PrintPage);
this.streamToPrint = streamToPrint;
this.streamType = streamType;
System.Windows.Forms.PrintDialog PrintDialog1 = new PrintDialog();
PrintDialog1.AllowSomePages = true;
PrintDialog1.ShowHelp = true;
PrintDialog1.Document = printDocument;
PrintDialog1.UseEXDialog = true; //needed because PrintDialog was not showing on 64 bit Vista systems
if (PrintDialog1.ShowDialog() == DialogResult.OK)
{
try
{
this.printDocument.Print();
}
catch
{
MessageBox.Show("A printer was not found. Please check connections");
}
}
}
public static void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format) {
Image img = CaptureWindow(handle);
img.Save(filename,format);
}
public static Image CaptureWindow(IntPtr handle){
// get the hDC of the target window
IntPtr hdcSrc = User32.GetWindowDC(handle);
// get the size
User32.RECT windowRect = new User32.RECT();
User32.GetWindowRect(handle,ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
// create a device context we can copy to
IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
// create a bitmap we can copy it to,
// using GetDeviceCaps to get the width/height
IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc,width,height);
// select the bitmap object
IntPtr hOld = GDI32.SelectObject(hdcDest,hBitmap);
// bitblt over
GDI32.BitBlt(hdcDest,0,0,width,height,hdcSrc,0,0,GDI32.SRCCOPY);
// restore selection
GDI32.SelectObject(hdcDest,hOld);
// clean up
GDI32.DeleteDC(hdcDest);
User32.ReleaseDC(handle,hdcSrc);
// get a .NET image object for it
Image img = Image.FromHbitmap(hBitmap);
// free up the Bitmap object
GDI32.DeleteObject(hBitmap);
return img;
}
private class GDI32{
public const int SRCCOPY = 0x00CC0020; // BitBlt dwRop parameter
[DllImport("gdi32.dll")]
public static extern bool BitBlt(IntPtr hObject,int nXDest,int nYDest,
int nWidth,int nHeight,IntPtr hObjectSource,
int nXSrc,int nYSrc,int dwRop);
[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC,int nWidth,
int nHeight);
[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
[DllImport("gdi32.dll")]
public static extern bool DeleteDC(IntPtr hDC);
[DllImport("gdi32.dll")]
public static extern bool DeleteObject(IntPtr hObject);
[DllImport("gdi32.dll")]
public static extern IntPtr SelectObject(IntPtr hDC,IntPtr hObject);
}
private class User32{
[StructLayout(LayoutKind.Sequential)]
public struct RECT{
public int left;
public int top;
public int right;
public int bottom;
}
[DllImport("user32.dll")]
public static extern IntPtr GetDesktopWindow();
[DllImport("user32.dll")]
public static extern IntPtr GetWindowDC(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern IntPtr ReleaseDC(IntPtr hWnd,IntPtr hDC);
[DllImport("user32.dll")]
public static extern IntPtr GetWindowRect(IntPtr hWnd,ref RECT rect);
}
}
}
