Print a windows form gives an empty page

Question

0.00/5 (No votes)

See more:

Hello all,

I'm trying to add receipt printing to a POS project I'm working on
I've create a win form with an image and listview

I've added the below code for printing but it only gives me empty page

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing.Printing;

namespace CrepeCity
{
    public partial class printPreview : Form
    {
        public printPreview()
        {
            InitializeComponent();
        }

        private void printPreview_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            CaptureScreen();
            printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);
            printDocument1.Print();
        }
        Bitmap memoryImage;

        private void CaptureScreen()
        {
            Graphics myGraphics = this.CreateGraphics();
            Size s = this.Size;
            memoryImage = new Bitmap(s.Width, s.Height, myGraphics);
            Graphics memoryGraphics = Graphics.FromImage(memoryImage);
            memoryGraphics.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s);
        }


        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {

        }

        private void printDocument1_PrintPage_1(object sender, PrintPageEventArgs e)
        {
            e.Graphics.DrawImage(memoryImage, 0, 0);
        }
    }
}

What I have tried:

Also I've tried this code to print a specific panel and it also gives me an empty page

<pre lang="c#">  [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern long BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, int dwRop);
        private Bitmap memoryImage;
        private void CaptureScreen()
        {
            Graphics mygraphics = this.CreateGraphics();
            Size s = this.Size;
            memoryImage = new Bitmap(s.Width, s.Height, mygraphics);
            Graphics memoryGraphics = Graphics.FromImage(memoryImage);
            IntPtr dc1 = mygraphics.GetHdc();
            IntPtr dc2 = memoryGraphics.GetHdc();
            BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369376);
            mygraphics.ReleaseHdc(dc1);
            memoryGraphics.ReleaseHdc(dc2);
        }
        private void printDocument1_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            e.Graphics.DrawImage(memoryImage, 0, 0);
        }

        private void button102_Click_1(object sender, EventArgs e)
        {
            CaptureScreen();
            printDocument1.Print();
        }

Posted 15-Feb-17 2:05am

Joey Arnanzo

Updated 15-Feb-17 2:39am

Add a Solution

Comments

[no name] 15-Feb-17 8:12am

Probably because you are capturing the screen and then doing nothing with the result.

Joey Arnanzo 15-Feb-17 9:57am

could you please guide me with the code to print out the result?

Dave Kreskowiak 15-Feb-17 12:15pm

You also didn't Dispose your Graphics object after you're done with them. Your code is leaking resources and will eventually crash your application and Windows.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2017-02-15T02:39:00

It works fine for me:

CaptureScreen();
memoryImage.Save(@"D:\Temp\aaaPix.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);
PrintPreviewDialog ppd = new PrintPreviewDialog();
ppd.Document = printDocument1;
ppd.ShowDialog();
printDocument1.Print();

I get a JPG file containing my form, I see it in the print preview, and I see it on paper from the preview "Print" button and from the direct print command.
I'd check that any of your code is being executed via the debugger.