Null dates in listview

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Null dates in listview

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Lesscher	Lesscher posted 16 Years Ago Topic Details Share Topic
Group: StrataFrame Users Posts: 9, Visits: 19	Hi, More questions about null values... I use a datepicker to display a date. I have to use the replacement value trick (1800-1-1) in order to save a NULL value when there is no date. No problems here... How can I show this field in a listview without showing the value 1800-1-1 to the user? Regards, Lesscher
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Edhy Rijo	E Edhy Rijo posted 16 Years Ago Post Details Share Post
E Group: StrataFrame Users Posts: 2.4K, Visits: 23K	Hi Lesscher, You can use the ListView.RowPopulating event to handle that situation and many more... Private Sub lstItems_RowPopulating(ByVal e As MicroFour.StrataFrame.UI.Windows.Forms.RowPopulatingEventArgs) Handles lstItems.RowPopulating '-- Cast the BO to the type needed. Using bo As bizItems = DirectCast(e.BusinessObject, bizItems) If bo.MyDateTimeField = Nothing orElse bo.MyDateTimeField = #1800-1-1# then e.Values(ColumnIndex).DisplayValue = String.Empty End If End Using End Sub I have not tested the above, but that can give you an idea. Edhy Rijo
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William John Tello	William John Tello posted 16 Years Ago Post Details Share Post
Group: Forum Members Posts: 17, Visits: 80	Edyhy, Out of curiosity, why would you assign the displayvalue property to String.Empty as opposed to "" (which is what I would have done and I think a more C# standard way to do it). I'm just curious if there is an advantage to using the Empty static method of the .Net string class? I'm also assuming there the C# string type must also have a string.Empty() counterpart (which I might have favored because I tend to use the C# types over the .Net types in my own coding).
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Edhy Rijo	E Edhy Rijo posted 16 Years Ago Post Details Share Post
E Group: StrataFrame Users Posts: 2.4K, Visits: 23K	William John Tello (09/09/2008) Out of curiosity, why would you assign the displayvalue property to String.Empty as opposed to "" Hi William, It is just for readability of the code, I rather see String.Empty than '' or "", in VFP you could use '', "", [] Edhy Rijo
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