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NumericUpDown didn't update when lost focus, StringFormat has no effect to the content string #3026
NumericUpDown didn't update
I‘ve wrote an simple solution to demonstrate this issue download code.
Value of NumericUpDown(NUD) was bonded to the field of Model class
if one typed something like "9.87654321" and tab to another control, the content of NUD will still be "9.87654321", not the exact one "9.876543 ms"
The thing is quirk because the NUD used in the offical demo solution (right-bottom in the Text tab) present well. If you input "9.87654321" and then change the focus, the content of NUD will update as expected immediately.
Can the problem be reproduce at your computer?