Is it possible to Provide the StringFormat value in a binding in Xaml from a property on the bindingContext?

Jeff Pfahl 91

When specifying a binding in Xaml I only seem to be able to provide a literal value for the StringFormat. I would like to define the format string on my binding context and have the binding use that.

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,741 Reputation points Microsoft Vendor

2022-06-21T09:46:57.1+00:00

What exactly is expected result that you want?

I would like to define the format string on my binding context and have the binding use that.

Do you want to define the format string in the property of ViewModel? If not, can you share related code about defining the format string on binding context?
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Jeff Pfahl 91 Reputation points

2022-06-21T17:03:36.473+00:00

I am creating a complex control using a ContentView. I would like be able to set the string format on a property of the contentview and then use that in the binding of a label which is a child of the contentview. I can bind to properties of the contentview with no problem. What I can't figure out is how to refer to a property of the contentview for the StringFormat property of the Binding. This is easy in code, but I would like to do it in the xaml for the contentview.
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,741 Reputation points Microsoft Vendor

2022-06-22T08:41:40.807+00:00

Do you want to use StringFormat in the xaml? If yes, here is simple code <Label Text="{Binding Date StringFormat='The long date is {0:D}'}" />. If not, can you share related code with me and give me some usage scene?
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Jeff Pfahl 91 Reputation points

2022-06-22T15:33:30.5+00:00

I what 'The long date is {0:D}' to be a reference to a property on the ConventView not a literal value.
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,741 Reputation points Microsoft Vendor

2022-06-24T03:28:59.793+00:00

Do you want to binding property in the background code from contentView's XAML? Can you share related code with me?