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Setter not called after TextBox loses focus

If the intention is to trigger the validation status immediately (which is what I get from your "need to call the setter anyway"), then why not just use a Loaded event at the Window level and assign String.Empty so that the validation code is triggered regardless?

Or even better, use IDataErrorInfo which performs validation during the getter call thus meaning the first time the TextBox loads, the IDataErrorInfo interface will be called and the property validated.

Categories : C#

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