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Wpf tooltip binding not updating

Wpf tooltip binding not updating


What you are assigning to the tooltip property is actually the content of the tooltip. This has been bugging me for months. If you want the full control, you can use the Explicit value and then do the updates manually, but this does take a bit of the fun out of working with data bindings. The first one is set to Explicit, which basically means that the source won't be updated unless you manually do it. However, it doesn't quite make sense why then assigning a TextBlock to the tooltip property actually solves the problem. The problem comes when you define your tooltip like this: Summary The UpdateSourceTrigger property of a binding controls how and when a changed value is sent back to the source. The first value doesn't update before you click the button, the second value isn't updated until you leave the TextBox, while the third value updates automatically on each keystroke, text change etc. The first two has already been described, while the last one simply means that the update has to be pushed manually through to occur, using a call to UpdateSource on the Binding. Seeing it inherits from content control this makes sense: I was assuming you needed to give it controls such as textblock and image to display but you can pass in anything and it will display the content just like a content control. This makes sense because the results of the property StaffToolTip get assigned to the tooltip property and never get called again.

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Wpf tooltip binding not updating. GridView not updating when property on item is changed.

Wpf tooltip binding not updating


What you are assigning to the tooltip property is actually the content of the tooltip. This has been bugging me for months. If you want the full control, you can use the Explicit value and then do the updates manually, but this does take a bit of the fun out of working with data bindings. The first one is set to Explicit, which basically means that the source won't be updated unless you manually do it. However, it doesn't quite make sense why then assigning a TextBlock to the tooltip property actually solves the problem. The problem comes when you define your tooltip like this: Summary The UpdateSourceTrigger property of a binding controls how and when a changed value is sent back to the source. The first value doesn't update before you click the button, the second value isn't updated until you leave the TextBox, while the third value updates automatically on each keystroke, text change etc. The first two has already been described, while the last one simply means that the update has to be pushed manually through to occur, using a call to UpdateSource on the Binding. Seeing it inherits from content control this makes sense: I was assuming you needed to give it controls such as textblock and image to display but you can pass in anything and it will display the content just like a content control. This makes sense because the results of the property StaffToolTip get assigned to the tooltip property and never get called again.

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1 thoughts on “Wpf tooltip binding not updating

  1. [RANDKEYWORD
    Mezik

    The first one is set to Explicit, which basically means that the source won't be updated unless you manually do it. However, it doesn't quite make sense why then assigning a TextBlock to the tooltip property actually solves the problem.

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