问题
I'm looking for a SL4 equivalent to .NET 4's SetCurrentValue API, which would appear to be exactly what I need for my scenario.
In short, I'm writing an attached behavior that updates the value of a given property at appropriate times. However, I don't want it to overwrite any bindings that are set on that dependency property. I merely want to push that value to the property (and therefore have any bindings refresh based on that value).
From what I can tell, there's no easy way to do this yet in SL4.
Thanks
回答1:
Silverlight does not provide direct access to this level of dependency value. However its this level of value that Animations in storyboards set when they manipulate a property.
Hence a Storyboard with a 0 length duration containing a single DiscreteObjectKeyFrame might achieve your desired result.
回答2:
I've managed to simulate what I'm after by detecting bindings and injecting a surrogate object between the source and target. I can then manipulate the surrogate and have both sides of the original binding refresh.
It's ugly and more work than I'd like, but it seems to work.
Kent
来源：https://stackoverflow.com/questions/3247008/silverlight-dependencyproperty-setcurrentvalue-equivalent