DependencyProperty.IsValidType(Object) Method
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Determines whether a specified value is acceptable for this dependency property's type, as checked against the property type provided in the original dependency property registration.
public:
bool IsValidType(System::Object ^ value);
public bool IsValidType (object value);
member this.IsValidType : obj -> bool
Public Function IsValidType (value As Object) As Boolean
- value
- Object
The value to check.
true
if the specified value is the registered property type or an acceptable derived type; otherwise, false
.
The following example uses IsValidType as a check before calling SetValue on the dependency property.
void TrySetValue(DependencyObject target, DependencyProperty dp, object providedValue) {
if (dp.IsValidType(providedValue))
{
target.SetValue(dp, providedValue);
}
}
Private Sub TrySetValue(ByVal target As DependencyObject, ByVal dp As DependencyProperty, ByVal providedValue As Object)
If dp.IsValidType(providedValue) Then
target.SetValue(dp, providedValue)
End If
End Sub
A value of null
is a valid type for reference type dependency properties, or for a Nullable<T> dependency property, and would return true
for these cases. In cases where the dependency property is neither a reference nor a Nullable<T> type, IsValidType will return false
for a null value rather than raise an exception.
Product | Versions |
---|---|
.NET Framework | 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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