draw vertical lines on image using c#

Question

2.50/5 (2 votes)

See more:

Hi!
i have a widows form in c#. what i want is to create an app that draw vertical line on a bitmap image. for that i wrote the following code:
private void Form1_Load(object sender, EventArgs e)
{
Bitmap bmOriginal = new Bitmap("kpk.bmp");
Rectangle cloneRect = new Rectangle(0,0 , 200, 200);
System.Drawing.Imaging.PixelFormat format =
bmOriginal.PixelFormat;

Bitmap bmTile1 = bmOriginal.Clone(cloneRect, format);
pictureBox1.Image = bmTile1;

}
but when i run the app is does not show the lines on image.i tried to change the values in ractangle but it didnt effect. can somebody tells me what wrong and what i need to do.?or any other C# source for that....?
thanks in advance

Posted 9-Feb-12 20:58pm

saifullahiit

Updated 9-Feb-12 21:00pm

v2

Add a Solution

Comments

Sergey Alexandrovich Kryukov 10-Feb-12 3:00am

Drawing on an image? Where?!
--SA

saifullahiit 10-Feb-12 3:02am

i m not drawing image. i want to draw lines on image.

Sergey Alexandrovich Kryukov 10-Feb-12 3:00am

And why?
--SA

2 solutions

Solution 1

First of all, I don't see where are you drawing on the image.

You would draw if you did

C#

System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(myBitmap);
graphic.DrawLine(/*...*/);
graphic.FillRectangle(/*...*/);

See: http://msdn.microsoft.com/en-us/library/system.drawing.graphics.aspx[^].

Besides, are you sure you need PictureBox. This control is often abused. It is only good if you put some static image in it, well, maybe change is on some event, but not for anything interactive, dynamic, animated, etc.

Please consider my advice where I'll show what to do instead.
Please see my past answers:
How do I clear a panel from old drawing[^],
draw a rectangle in C#[^].

See also:
What kind of playful method is Paint? (DataGridViewImageCell.Paint(...))[^],
capture the drawing on a panel[^].

—SA

Posted 9-Feb-12 21:09pm

Sergey Alexandrovich Kryukov

Updated 9-Feb-12 21:10pm

v2

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 · 2012-02-09T21:09:00

Solution 2

That might have something to do with you not drawing any lines...
Try adding this:

C#

Bitmap bmTile1 = bmOriginal.Clone(cloneRect, format);
using (Graphics g = Graphics.FromImage(bmTile1))
    {
    g.DrawLine(Pens.White, 0, 0, 100, 100);
    }
pictureBox1.Image = bmTile1;

Posted 9-Feb-12 21:09pm

OriginalGriff

Comments

saifullahiit 10-Feb-12 9:01am

it only draw one line. i want to draw 10 line. can you tell me how is it possible?

OriginalGriff 10-Feb-12 9:43am

You could call it ten times, with different values...