Hi, Sergio

 

You can use the RowFilter property of DataView and with that you can accomplish your both cases refer the links they both have such situation for date column. It might helps you..

 

https://stackoverflow.com/questions/5168112/c-sharp-dataview-rowfilter-null-value-for-datetime-column

 

https://forums.asp.net/t/1794383.aspx?Use+DataView+RowFilter+to+select+empty+DateTime+field 

 

Thanks.

Hello,

 

Try this:

 

dv.RowFilter = "( ( >= '" + dtStartDate.ToShortDateString()

+ "' and <= '" + dtEndDate.ToShortDateString() + "') or ( is null))";