Apr 26, 2011

C# MessageBox

If you look at the message box we created in the previous section, you'll notice there's no Title in the blue area to the left of the red X - it's blank:
Click the button on your C# Form
You can add a Title quite easily.
Click OK on your Message Box. Then click the Red X on your programme to exit it. This will return you to Visual C#. Go back to the coding window (press F7 on your keyboard, if you can't see it).
Position your cursor after the final double quote of "My First Message", circled in red in the image below:
Position your cursor
Now type a comma. As soon as you type a comma, you'll see the list of Show options again:
The options for the C# Show Method
Type the following:
"Message"
Again, you need the double quotes. But your line of code should look like this:
A Title has been added
When your line of code looks like the one above, Run your programme again. Click your button and you should see a Title on your Message Box:
The title is now displayed on the messagebox

Other Button Options

Rather than having just an OK button, you can add buttons like Yes, No, and Cancel to your C# message boxes. We'll add a Yes and a No button.
Return to your coding window. After the second double quote of the Title you've just added, type another comma. Hit the spacebar on your keyboard once, and you'll see the IntelliSense list appear. (If it doesn't appear, just type a capital letter "M").
Message Box Buttons in C#
The one that adds buttons to a message box is, you won't be surprised to hear, MessageBoxButtons. Press the enter key on your keyboard when this option is highlighted. It will be added to the your code. Now type a full stop (period) after the final "s" of MessageBoxButtons. You'll see the button options:
The button options
Double click the one for YesNo, and it will be added to your code.
Run your programme again, and click your button. Your Message Box will then look like this:
What the Yes and No buttons look like

Adding Icons to a C# Message Box

Another thing you can add to brighten up your Message Box is an Icon. It's easier to see what these are than to explain!
Type another comma after MessageBoxButtons.YesNo. After the comma, type a capital letter "M" again. From the IntelliSense list that appears, double click MessageBoxIcon. After MessageBoxIcon, type a full stop to see the available icons:
MessageBox Icons
We've gone for Asterisk. Double click this to add it to your code. Run your programme again to see what the icon looks like on your Message Box:
An Asterisk has been added to the Message Box
Looks pretty impressive, hey! And all that with one line of code!

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