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Normal Topic ZoomFactor binding is not working (Read 2215 times)
rajesh_patil74
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ZoomFactor binding is not working
Jan 27th, 2011 at 1:10pm
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Hi Stoyo

I seen that zoomfactor is dependency property. But I am not able to do binding for same in xaml file.

At run time , i get exception
"ZoomFactor must be positive number" ... even my model file property (which is used for binding) has value set to 100.

-Rajesh
  
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Stoyo
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Re: ZoomFactor binding is not working
Reply #1 - Jan 27th, 2011 at 3:15pm
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Hi Rajesh,

The throw code looks like this, so the exception will only happen if your bound value is 0 or a negative number at some point -

if ((double)e.NewValue <= 0)
     throw new ArgumentException("ZoomFactor must be positive number");

Stoyan
  
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rajesh_patil74
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Re: ZoomFactor binding is not working
Reply #2 - Jan 28th, 2011 at 4:55am
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Hi Stoyo

What I observed is that, when xaml file gets loaded the datacontext for the xaml page is not assinged and at that time exception gets raised since the value assinged in xmal exceutes the assingment statment and at that time value of zoomfactor is passed as 0.

-Rajesh
  
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Stoyo
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Re: ZoomFactor binding is not working
Reply #3 - Jan 28th, 2011 at 8:56am
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Hi,

Can't you set DataContext before the InitializeComponent call in the Page constructor?

Stoyan
  
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