Quick code commenting and uncommenting using Visual Studio
Yesterday, I was talking with one of the folks here and I learned something about Visual Studio. We were looking at some code and he selected a line, clicked a button, on the toolbar, and the line was commented out. I asked him what he just did and he introduced me to the handy comment / uncomment buttons. For years, I've been a C/C++/C# multi-line comment person, manually adding /*
and */
around any code I wanted to temporarily remove. While that is a fast / easy way to comment out a block of code, this is even easier, especially when I discover that I already have a multi-line comment block within the code I wish to disable. For languages which do not support multi-line comments, this saves a lot of time.
To illustrate this feature, I will use the following simple method:
protected override void OnPaint(PaintEventArgs e){ Graphics g = e.Graphics; Single x = 0f; Single y = 0f; String message = ".NET Compact Framework"; SizeF msgSize = g.MeasureString(message, this.Font); x = (Single)(Screen.PrimaryScreen.Bounds.Width / 2) - (msgSize.Width / 2); y = (Single)(Screen.PrimaryScreen.Bounds.Height / 2) - (msgSize.Height / 2); g.DrawString(message, this.Font, new SolidBrush(Color.Blue), x, y);}
Commenting
The above code centers a string message in a Form's OnPaint method. Let's comment out the portion that calculates the string position.
- Highlight the following lines:
SizeF msgSize = g.MeasureString(message, this.Font);x = (Single)(Screen.PrimaryScreen.Bounds.Width / 2) - (msgSize.Width / 2);y = (Single)(Screen.PrimaryScreen.Bounds.Height / 2) - (msgSize.Height / 2);
- On the text editor toolbar, click the Comment button (it's the one with the horizontal black and cyan lines)
Alternately, you can use the keyboard shortcut (Ctrl+K followed by Ctrl+C)
The method now looks like this:
protected override void OnPaint(PaintEventArgs e){ Graphics g = e.Graphics; Single x = 0f; Single y = 0f; String message ".NET Compact Framework"; //SizeF msgSize = g.MeasureString(message, this.Font); //x = (Single)(Screen.PrimaryScreen.Bounds.Width / 2) - // (msgSize.Width / 2); //y = (Single)(Screen.PrimaryScreen.Bounds.Height / 2) - // (msgSize.Height / 2); g.DrawString(message, this.Font, new SolidBrush(Color.Blue), x, y);}
Uncommenting
Now, let's uncomment the code that centers the message horizontally (leaving it at the top of the form).
- Highlight the following lines:
//SizeF msgSize = g.MeasureString(message, this.Font);//x = (Single)(Screen.PrimaryScreen.Bounds.Width / 2) - // (msgSize.Width / 2));
- On the text editor toolbar, click the Uncomment button (it's the one with the horizontal black and cyan lines, with a blue reverse arrow)
Alternately, you can use the keyboard shortcut (Ctrl+K followed by Ctrl+U)
The method now looks like this:
protected override void OnPaint(PaintEventArgs e){ Graphics g = e.Graphics; Single x = 0f; Single y = 0f; String message ".NET Compact Framework"; SizeF msgSize = g.MeasureString(message, this.Font); x = (Single)(Screen.PrimaryScreen.Bounds.Width / 2) - (msgSize.Width / 2)); //y = (Single)(Screen.PrimaryScreen.Bounds.Height / 2) - // (msgSize.Height / 2)); g.DrawString(message, this.Font, new SolidBrush(Color.Blue), x, y);}
Enjoy!
-- DK
Disclaimer(s):
This posting is provided "AS IS" with no warranties, and confers no rights.