Everything works fine until I call this.Triggers.Add(TriggerFocus). This class sub-classes ContentControl.
Here's my code:
private void CreateTriggers()
{
TriggerFocus = new MultiTrigger
{
Conditions =
{
new Condition
{
Property = IsFocusedProperty,
Value = true
},
new Condition
{
Property = IsKeyboardFocusedProperty,
Value = true
}
},
Setters =
{
new Setter
{
Property = SetFocusProperty,
Value = true
},
}
};
this.Triggers.Add(TriggerFocus);
}
Any ideas?
Here's the equivalent xaml which also throws an error:
<ContentControl.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="ContentControl.IsFocused" Value="True"/>
<Condition Property="ContentControl.IsKeyboardFocused" Value="True"/>
</MultiTrigger.Conditions>
<Setter TargetName="BorderFocus" Property="ContentControl.Visibility" Value="Visible" />
</MultiTrigger>
</ContentControl.Triggers>
After some testing I have isolated the problem to the MultiTrigger above. It seems to work fine if I put the trigger in a template or style.
The error thrown is not very informative: Initialization of 'System.Windows.Controls.ContentControl' threw an exception
您只能将EventTriggers放入<ContentControl.Triggers>
集合中。
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