Setting FontWeight in code?

Question

 

In XAML, font weight can be set to bold by simply doing <TextBlock FontWeight="Bold".... />

 

How does one do the equivalent in C#?

Answer 1

you could do

txt1.SetValue(TextBlock.FontWeightProperty, FontWeights.Bold);//txt1- textblock

 

Answer 2

Is this for real?  Does no-one know that you can just set the property?????

 

TextBlock txtblk = new TextBlock();

txtblk.FontWeight = FontWeights.Bold;

 

Surely using SetValue is more typing and more obscure than simply setting the property.

 

 

Answer 3

In general, is there a performance cost calling the property accessor (which sets the DP) versus directly setting the DP, or does the compiler inline or otherwise make the call disappear?

Answer 4

The cost of using a property to get\set a dp is no more than the cost of using a property to set a field.

 

Unless you are trying to shave milliseconds off a tight loop with tons of iterations, you are probably better off with the readability of a Property setter

 

--Ifeanyi Echeruo [MSFT]

Answer 5

lol Charles.  I guess some things are easier than meets the eye...

 

Answer 6

and what about for <Bold>some bold text here</Bold> ?

If I want to make only a portion of a string bold, and then assign that string to the Text property of a TextBlock element...  how would I do this programmatically?

is <Bold />  a real element? 
Does that mean that I must create assign

TextBlock.Text = (string)string1 + (Bold)boldString + (string)string2;

?


...
It would be nice if it were easier to tell how to accomplish something in code that the Designer makes quite easy.

Answer 7

Of course it is a FrameworkElement...  but creating one with code is not the most straightforward process.

Naturally, you cannot convert a string into a Bold.  It seems as though Bold takes only TextPointers to determine what text gets bolded.  This seems really counter-intuitive, though I am certain there is some reason, good or otherwise, for doing this.
Perhaps I am approaching this from the wrong angle.

It seems a little cumbersome to be mashing together several TextBlocks just so that I can manage to programmatically bold some font in my interface.

Answer 8

This took way too long to find.  I can't believe it's this bloody complicated.  It seems like I should be able to tell it what text to bold, from what string, and it would do it.  I'll have to write my own little method for that. :P

Anyhow, this code was found here:
http://msdn.microsoft.com/en-us/library/system.windows.documents.inline.siblinginlines.aspx

And the page itself had shockingly little to do with what I was trying to accomplish.  I had to find this by looking at each method and property...  jeezum.


// A host paragraph to hold the example Inline elements..
Paragraph par = new Paragraph();

// Some arbitrary Inline elements.
Run run1 = new Run("Text run number 1.");
Run run2 = new Run("Text run number 2.");
Bold bold = new Bold(new Run("Bold text."));
Italic ital = new Italic(new Run("Italic text."));
Span span1 = new Span(new Run("Span number 1"));
Span span2 = new Span(new Run("Span number 2"));

// Add the Inline elements to the Paragraph. Note the order
// of the inline elements in the paragraph; the order is 
// arbitrary, but the notion of an order is important with 
// respect to  what are 'previous' and 'next' elements.
par.Inlines.Add(run1);
par.Inlines.Add(run2);
par.Inlines.Add(bold);
par.Inlines.Add(ital);
par.Inlines.Add(span1);
par.Inlines.Add(span2);

Answer 9

Thank you!

Answer 10

nice

Answer 11

TextBlock txtblk = new TextBlock();

txtblk.FontWeight = FontWeights.Bold;

This works a treat!

My code has a MPF window with a button on it and when I hover over that button wanted the font weight to change:

this.btnButton.FontWeight = FontWeights.Bold;

Best