Mysql state invalidating
Mysql state invalidating - speed dating events in bristol
More specifically, it must be kept between the Minimum and Maximum values.That means if either the Minimum or Maximum values change, the Value property must explicitly be coerced.
In WPF, a dependency property on a framework element can be registered with one or more metadata options.
Unfortunately, this can lead to code that is cumbersome to maintain, especially if you need to use the same mechanism in several different classes.
Furthermore, achieving parity between frameworks can prove to be very difficult.
I’d like to highlight one more feature that is available in Silverlight if you use my code snippets.
Those who watched the value coercion video might have glimpsed the following enum within the Framework Property code file: This enum provides a limited subset of the metadata options that are available in WPF.
I hope you find the provided layout metadata options handy! The mechanism for coercing values is identical to the Coerce Value Callback approach used in WPF. If you are not familiar with value coercion, it is simply a mechanism by which related (or ) dependency properties can be kept in sync and valid.
The quintessential example can be found within the Slider control. Clearly, it would be a problem if the Maximum value were allowed to fall below the Minimum value.
Otherwise, the “base” and “effective” values are simply equal.
Value Coercion is Not Natively Supported in Silverlight There’s nothing more frustrating than needing to port something from WPF to Silverlight and realizing that a key feature like value coercion does not yet exist in Silverlight.
There are several metadata options in WPF that are not included in my Silverlight enum.
These are intentionally excluded because they either cannot be supported outside the native Silverlight framework (e.g., the property engine would need to be modified to support the Not Data Bindable option) or they simply don’t make sense in Silverlight (e.g., Silverlight does not currently support direct rendering via an On Render() override, so I don’t provide an Affects Render flag). WPF My latest snippets package adds value coercion support to Silverlight dependency properties.
Value coercion is used to prevent this invalid state from occuring.