how to take a screenshot...bugs?

Question

0.00/5 (No votes)

See more:

I snipped this code off a website, however...

private void btnSayHello_Click(object sender, RoutedEventArgs e)
        {
            this.txtSayHello.Text = "Jon C...";
            MessageBox.Show("Hello " + txtSayHello.Text);

            //take a screenshot
            int screenWidth = Screen.GetBounds(new Point(0, 0)).Width; 
            int screenHeight = Screen.GetBounds(new Point(0, 0)).Height;
//ERROR: Screen does not exist in the current context


            Bitmap bmpScreenShot = new Bitmap(screenWidth, screenHeight);
            Graphics gfx = Graphics.FromImage((Image) bmpScreenShot);
//ERROR: Invalid argument is being passed to Graphics.FromImage, and, 
//conversion to (Image) is not accepted by VS2010 (.NET 4)
            gfx.CopyFromScreen(0, 0, 0, 0, new Size(screenWidth, screenHeight));
//ERROR: Invalid arguments passed to gfx.CopyFromScreen
            bmpScreenShot.Save("test.jpg", ImageFormat.Jpeg);
//ERROR: The name ImageFormat does not exist in the current context.
        }

Sourced from .[^]

Posted 12-Feb-12 2:07am

jon-80

Add a Solution

2 solutions

Solution 2

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

using System.Drawing.Imaging;
namespace Screenshot
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int screenWidth = Screen.GetBounds(new Point(0, 0)).Width;
            int screenHeight = Screen.GetBounds(new Point(0, 0)).Height;
            Bitmap bmpScreenShot = new Bitmap(screenWidth, screenHeight);
            Graphics gfx = Graphics.FromImage((Image)bmpScreenShot);
            gfx.CopyFromScreen(0, 0, 0, 0, new Size(screenWidth, screenHeight));
            bmpScreenShot.Save("test.jpg", ImageFormat.Jpeg);
        }
    }
}

Code snipped from

Posted 12-Feb-12 3:05am

jon-80

Comments

NeptuneHACK! 12-Feb-12 10:01am

my 5

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 · 2012-02-12T02:25:00

Add:

C#

using System.Drawing.Imaging;

and the last problem goes away.

The others? Will, it may be that you don't have System.Windows.Forms in you list of using files, and you could add it, but I suspect that you don't have it because your application is not Windows Forms - it is Web based.

If so, then no matter what you do, you cannot take a screen shot of the client computer - security will not let you. You can probably take a screen shot of the server computer, and it may even appear to work (i.e. take a screenshot of the client) while you are testing, but when you move to the production system where the server and client are different computers, it will fail. Guaranteed.