Compare all rows of a particular column - vb.net

Question

Private Shared Function ValidateDate(dataTable As DataTable) As Boolean
Dim Currentdate As Date = Date.Now()
Dim Rows As New List(Of String)
Dim result As Boolean = True
For Each Row As DataRow In dataTable.Rows
If Not Currentdate Is Then
Next
Return result
End Functionhere
I want to compare rows of datecolumn of DataTable with the current date and return whether or not it's matches the current date.

Answer 1

code:
Private Shared Function ValidateDate(dataTable As DataTable) As Boolean
Dim Currentdate As Date = Today
Dim result As Boolean = True
For Each row As DataRow In dataTable.Rows
If Not CDate(row.Item("ReportDate")) >= Currentdate Then
result = False
Exit For
End If
Next
Return result
End Function
Thank you for your responses .I used this method to validate date in every row of datecolumn

Answer 2

Maybe this could help (not tested but should work)...This approach gives you a list with the rows who matched your criteria
Dim Currentdate As Date = Today
Dim lst as New List(of DataRow)
For each row as DataRow in datatable.Rows
If CDate(row.Items(index or columname)) = currentdate Then
lst.Add(row)
Next
return lst
Notice you have time in date datatype, which will be 0:00:00 if you dont give it explicitly.
(Should be no Problem, if all valuesa are only dates "with default 0:00:00 time") If not you will **get only true if date & time are the same **!
So you should use Today instead of Date.Now().. Every time you call Date.Now() you get the actual date & actual time. With Today you get actual date and time = 0:00:00.