Performance Issues raised during Programming in asp.net and vb.net

[rasesh28]

Hi all,
I am using asp.net to create few dropdowns on the page for date and time. I dont want to use calender control, as it is too huge for the application and I dont want to use multi view either so as to finish off the processing on the same page at once. The two approaches are as follows:

Dim DateList() As Integer = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}

Approach 1:

Drop1.datasource = datelist
Drop1.databind
Drop2.datasource = datelist
drop2.databind
.
.
.
.
and similarly for about 5 to 6 drop downs.

Approach 2:

For i = 1 to 31
Drop1.items.add(i)
Drop2.items.add(i)
.
.
.
Next

Which one is better for the server performance. Any help with some explaination would be appreciated.

Cheers.
Rasesh.

[nateraaaa]

Hi all,
I am using asp.net to create few dropdowns on the page for date and time. I dont want to use calender control, as it is too huge for the application and I dont want to use multi view either so as to finish off the processing on the same page at once. The two approaches are as follows:

Dim DateList() As Integer = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}

Approach 1:

Drop1.datasource = datelist
Drop1.databind
Drop2.datasource = datelist
drop2.databind
.
.
.
.
and similarly for about 5 to 6 drop downs.

Approach 2:

For i = 1 to 31
Drop1.items.add(i)
Drop2.items.add(i)
.
.
.
Next

Which one is better for the server performance. Any help with some explaination would be appreciated.

Cheers.
Rasesh.

Approach 1 should be less server intensive because the list is already built. All that has to be done is binding the data to the drop down list. In approach 2 the server will spend more time because it has to loop from 1 to 31 and add the item to each drop down list. However, a simple loop such as this should not be noticed by the end user. Does you application have other areas that are dragging down performance?

Nathan

[Plater]

I am fairly certain that, internally, the databind command just itterates through the datasource and adds the items.
For collections as small as date selections, you won't even notice a difference.

If it really matters, try creating a DateTime object before and after all the calls and then comparing them. Which took more time? (Not sure the unit of measure is small enough though)

Approach 1 should be less server intensive because the list is already built. All that has to be done is binding the data to the drop down list. In approach 2 the server will spend more time because it has to loop from 1 to 31 and add the item to each drop down list. However, a simple loop such as this should not be noticed by the end user. Does you application have other areas that are dragging down performance?

Nathan