Add copyright information to a picture (C #)

Add copyright information to a picture (C #)



Now more and more websites like to upload the user's pictures plus the copyright information of the site, do not think that is using Photoshop and other picture processing software added to, in fact, we just write a small piece of code, you can achieve this function.



The principle of adding copyright information is quite simple: get the object of graphics class by picture, the class has a drawstring () method can write the information to the picture, even can make a variety of effects, such as watermark, background transparent and so on. The final save picture is done.



We create a Windows Application project, and the interface design is as follows:





The code to add copyright information is as follows:

Create a bitmap

Bitmap bitmap=new Bitmap (This.picturebox2.width,this.picturebox2.height, SYSTEM.DRAWING.IMAGING.PIXELFORMAT.FORMAT24BPPRGB);

Get a canvas from a bitmap

Graphics g=graphics.fromimage (bitmap);

Empty the canvas and fill with a transparent color

G.clear (color.transparent);

Draw another picture onto the canvas

G.drawimage (this.picturebox1.image,0,0);

Write the copyright message to the picture.

g.DrawString (This.textbox2.text,new Font ("bold"), New SolidBrush (color.red), New Rectangle (20,20,100,100));

Show

This.picturebox2.image=bitmap;

Save picture

Bitmap. Save ("C:\\abc.bmp", SYSTEM.DRAWING.IMAGING.IMAGEFORMAT.BMP);



By the way, click the event program for the "select" button:

private void Button1_Click (object sender, System.EventArgs e)

{

if (This.openFileDialog1.ShowDialog () ==dialogresult.ok)

{

if (this.openfiledialog1.filename.length==0)

{

MessageBox.Show ("Please select Picture", "error", Messageboxbuttons.ok,messageboxicon.error);

Return

}

This.textbox1.text=this.openfiledialog1.filename;

FileStream fs=new FileStream (this.openfiledialog1.filename,filemode.open,fileaccess.read);

Try

{

This.picturebox1.image=image.fromstream (FS);

}

catch (Exception)

{

MessageBox.Show ("The file you selected is not a recognizable picture format", "Error", Messageboxbuttons.ok,messageboxicon.error);

}

Finally

{

Fs. Close ();

}

}

}