Vb net datetimepicker validating onion dating

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I've even tried customising it - overriding some of its methods - again with no joy.

You've found a workaround - using Lost Focus - when using the DTP as a stand alone control. In the context of a custom column in a datagrid, about the only alternative I can suggest to "user education" is to shift data validation from the cell level to the row level (i.e.

I haven't tested it with a Date Time Picker in a Data Grid Column Style, but I can't offhand think why it should be different. Roger On second thoughts, I don't think the behaviour with a custom format is any different from with any other. In the analogous DTP situation cell-level committal seems to occur either when a cell is "full" (i.e.

2 digits in a cell which will take 2 digits) or when a new cell is moved to (e.g.

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(The value isn't changed before the Commit method fires.) Further experimenting indicates that if one types either a leading zero or a trailing slash (to make a two-digit day/month or to indicate the end of the day/month and moving on to the next part of the date), that will fire the Value Changed event. I agree that it's probably a bug (or a pretty radical design flaw).Is my only solution user education to do one of those things, or is there another way to get the value changed before Validating/Commit fires? The control is, I reckon, composed of various sub-controls.Try using a custom format with a single marker for the day and the month. For me, that fires value changed with a single digit entry before validation fires. Using the analogy of a datagrid's rows, the movement from cell to cell within a row "commits" an edit to the cell that has just been left, and any move to a new row both "commits" the cell that has just been left and then "commits" the whole row that has just been left. The windows forms Date Time Picker control Gives you flexibility in formatting the display of Date and time in control. This control consist a label which shows the date and a calender by which you can select the new date.

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