How to capture client of form to image file in C#?

Question

1.00/5 (2 votes)

See more:

Hi all,
I have a problem: I need to capture of Form to image file in C#. This is my code to do this, but it is not to work correctly, I want to get only client area, not get another area of form:

public void GhiImage()
        {
            try
            {
                SaveFileDialog SvDialog = new SaveFileDialog();
                SvDialog.Title = "Ghi thanh file anh!";
                SvDialog.DefaultExt = "bmp";
                SvDialog.Filter = "Ảnh bitmap (*.bmp)|*.bmp |Ảnh jpg (*.jpg)|*.jpg";
                SvDialog.FilterIndex = 1;

                if (SvDialog.ShowDialog() == DialogResult.OK)
                {
                    Graphics g = this.CreateGraphics();
                    Bitmap bmp = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);
                    this.DrawToBitmap(bmp, this.ClientRectangle);
                    bmp.Save(SvDialog.FileName);
                    bmp.Dispose();
                }
            }
            catch
            {
            }
        }

It contains all of Form (border and client area). Now help me fix my code to work exactly. Thanks you, everyone.

What I have tried:

I coded it, but it worked uncorrectly!

Posted 19-Sep-18 23:51pm

Volga_

Updated 20-Sep-18 0:15am

v2

Add a Solution

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)

phil.o · Accepted Answer · 2018-09-20T00:16:00

Solution 1

Both these lines:

C#

Bitmap bmp = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height);
this.DrawToBitmap(bmp, this.ClientRectangle);

allow you to specify which part of the client area you want to draw to your bitmap. Here it does exactly want you asked for: it draws the entire client area. If you want only a portion of it, you have to define a rectangle delimiting this portion, and use this rectangle instead of ClientRectangle.

Posted 20-Sep-18 0:16am

phil.o

Comments

Volga_ 20-Sep-18 6:22am

Thanks for your shearing. But I want to get only client area, my code above gets all client area and border area of form. I can not do more for this problem, help me with code. Thanks.

phil.o 20-Sep-18 6:37am

You know the moto "Give a man a fish, etc..."? When you say you cannot do more, I actually read I don't want to understand, just be provided with a ready made solution.
Please have a look at Rectangle.Inflate method [^], which should allow you to adapt rectangle's dimensions to your needs.

Volga_ 20-Sep-18 7:36am

Thanks. Maybe my English is very bad, and you do not understand my problem. Thanks again.

phil.o 20-Sep-18 7:46am

I understood your problem: you want to strip off the borders from the image. Problem is: I do not have any clue about the dimensions of these borders. So, how am I supposed to be more acurate? It is up to you to use the method I gave you a link for, so that you can find yourself the way to achieve your goal.
I do not thank you for the downvote, though.

Volga_ 20-Sep-18 8:09am

Because of your hidden reply I did not understand all and voted down with your reply. Sorry you so much, I am new C#, I am mechanical engineer, not am IT engineer, so that everything is difficult for me. I will be studying things that you sent to me and hope that it is good for me. Problem about the dimensions of these borders I thinked and calculated: top=20, bottom=8, left=8 and right=8. But I do not understand why above my code was not to work as I want. If you can, you explain with code. I am not the same person in the motoes "Give a man a fish..." as you quoted.