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See more: C# buttons size font
I have a button which has this code:
            fontsize = richTextBox1.Font.Size;
            fontsize++;
            richTextBox1.SelectionFont = new Font(richTextBox1.Font.Name, fontsize, richTextBox1.Font.Style, richTextBox1.Font.Unit);
The fontsize is a float by the way:
static float fontsize = 9F; // declared at the start of program
Basically it sets the rich text box selected font 1 size bigger. But it doesn't work with SelectionFont.
It works fine with richTextBox1.Font = new Font .... This will just keep going up 1 every time but with SelectionFont it stops at 10 and won't go higher. And if I use another button to lower the SelectionFont size it won't go below 8 and it skips out 9.
 
What am I doing wrong with SelectionFont to make it like this? I just want the fontsize to go up and down, much like that of the buttons in MS Word.
Help please =)
Posted 13-Jan-12 6:12am
Edited 13-Jan-12 6:25am
Mehdi Gholam249.6K
v3
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Solution 2

You are using the wrong value to create the new font, you should be using the SelectionFont.Size like this:
    fontsize = richTextBox1.SelectionFont.Size + 1;
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Comments
SAKryukov at 13-Jan-12 17:53pm
   
This is a catch, my 5.
--SA
manognya kota at 14-Jan-12 4:01am
   
Good one. my 5.
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Solution 1

It's something you're doing. There's no problem with the different point sizes. I just wired up an RTB and a NumericUpDown control and the following code worked just fine:
    Font oldFont = RTB.SelectionFont;
    Font newSize = new Font(oldFont.FontFamily.Name, FontSizeUD.Value, oldFont.Style);
    RTB.SelectionFont = newSize;
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Solution 3

All the comments are perfect
but,
For Temporary purpose u can use ctrl+ScrollUP OR Down to Min OR Max Font
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