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BC30311: Value of type 'System.Data.DataView' cannot be converted to '1-dimensional array of System.Data.DataView'.
I get the error "BC30311: Value of type 'System.Data.DataView' cannot be converted to '1-dimensional array of System.Data.DataView'." whith the below
dvholidays = New DataView(dtholidays, "DATEPART(YEAR, Date) = " & e.Day.Date.Year & " AND " & "DATEPART(MONTH, Date) = " & e.Day.Date.Month, "", DataViewRowState.CurrentRo
any idea why?
dvholidays = New DataView(dtholidays, "DATEPART(YEAR, Date) = " & e.Day.Date.Year & " AND " & "DATEPART(MONTH, Date) = " & e.Day.Date.Month, "", DataViewRowState.CurrentRo
any idea why?
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If it helps im looking to do a foreach loop where DATEPART(YEAR, Date) = " & e.Day.Date.Year & " AND " & "DATEPART(MONTH, Date) = " & e.Day.Date.Month, in the datatable if there is an easyer why of doing this
the error lies in the way you declared dvholidays variable.
it should be :
Dim dvholidays as DataView
it should be :
Dim dvholidays as DataView
if you declare the variable as array, you have to assign to a specific "slot" of the array:
dvholidays(1) = New DataView( ... )
or the like
dvholidays(1) = New DataView( ... )
or the like
i now get the following error :S The expression contains undefined function call DATEPART().
DATEPART(YEAR, Date) = " & e.Day.Date.Year & " AND " & "DATEPART(MONTH, Date) = " & e.Day.Date.Month,
DATEPART(YEAR, Date) = " & e.Day.Date.Year & " AND " & "DATEPART(MONTH, Date) = " & e.Day.Date.Month,
that's a new error ... should normally be a new question
anyhow, DATEPART is not a ADO function, so you cannot use it directly
you need to prepare the data in the underlying rowset in a way you can filter as needed.
either you have 2 fields containing only the year and month values; or you have the date field as string in format yyyymmdd etc ... and you can do >= '201101' and < '201201' if you want full year 2011 ...
anyhow, DATEPART is not a ADO function, so you cannot use it directly
you need to prepare the data in the underlying rowset in a way you can filter as needed.
either you have 2 fields containing only the year and month values; or you have the date field as string in format yyyymmdd etc ... and you can do >= '201101' and < '201201' if you want full year 2011 ...
what I wrote above, you need to make the data in a way you can work correctly.
with dataviews, this can be tricky, as you don't have "all" the functions you may need to make it efficient.
note that usually, if the underlying sql can solve the filtering directly, especially if the filter would return only very few rows from a huge data set, you are better of querying with the filter direclty in the sql ...
with dataviews, this can be tricky, as you don't have "all" the functions you may need to make it efficient.
note that usually, if the underlying sql can solve the filtering directly, especially if the filter would return only very few rows from a huge data set, you are better of querying with the filter direclty in the sql ...
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