Using PictureBox as a TrackBar in C#

Question

I'm making a trakbar with a picture in the pictureBox. By clicking that trackbar, there must be a black vertical line. But there is a problem shown below.

http://j1307.hizliresim.com/1c/8/q0rh1.png

Answer 1

Your problem is that shoe-horning a DateTime into a string won't give you a supported filename for the image to save to.

As example:

String fileName = "C:\\" + DateTime.Now + ".bmp";
File.Create(fileName);

will throw an error because fileName gives you a path of C:\08/07/2013 12:41:39.bmp - which is not a valid file path.

To fix this you would format the DateTime potion of your string to something more palatable, like

String formattedDateTime = DateTime.Now.ToString("s").Replace(":","-");
String fileName = String.Format(@"C:\{0}.bmp", formattedDateTime);
File.Create(fileName);

This would give you a filename like C:\2013-07-08T12-48-57.bmp which will not only save but is sort-able as well.

So finally, to apply this to your code, you would use

String formattedDateTime = DateTime.Now.ToString("s").Replace(":","-") ;
String fileName = String.Format(@"C:\{0}.bmp", formattedDateTime);
img.Save(fileName);