How to findout the length of CheckBoxlist on serverside?

I have a checkboxlist in a div which shows name gettin data from db. I have to findout the lenght of this checkboxlist on OnSelectedIndexChanged to make some db action on selected item/value. S开发者_开发知识库omeone help me out!!!!!

Presuming your CheckBoxList variable is called checkboxlist use the following to determine the amount of items:

int numberOfItems = checkboxlist.Items.Count

The CheckBoxList.Items property returns a ListItemCollection containing your controls, from here you can use the count property to determine the length of the list or the number of items it contains.

<asp:CheckBoxList id="Check1" RepeatLayout="flow" runat="server" AutoPostBack="true" >
 <asp:ListItem>Item 1</asp:ListItem>
 <asp:ListItem>Item 2</asp:ListItem>
 <asp:ListItem>Item 3</asp:ListItem>
 <asp:ListItem>Item 4</asp:ListItem>
 <asp:ListItem>Item 5</asp:ListItem>
 <asp:ListItem>Item 6</asp:ListItem>
</asp:CheckBoxList>

Protected Sub Check1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Check1.SelectedIndexChanged

Dim items As String = Check1.Items.Count

End Sub