Question

I have a aspx page which contains the following CheckBoxList.

<form id="form1" runat="server">

    <asp:CheckBoxList id="check1" AutoPostBack="True" TextAlign="Right" OnSelectedIndexChanged="Check" runat="server">

    </asp:CheckBoxList>
    <br />
    <asp:label id="mess" runat="server"/>

</form>

Then in the .vb page I have a query in the Page_Load sub where I get all the customer names and whether or not they are a validated user (either true or false). When I loop through the dataset I want to add a ListItem for each name and if they are a validated user I want to have the checkbox checked. Here is my loop for the dataset

    For i = 0 To dt.Rows.Count - 1
        If CStr(dt.Rows(i).Item("isValid")) = True Then
            "<asp:ListItem>" + CStr(dt.Rows(i).Item("Name")) + "</asp:ListItem>" 
        Else
            "<asp:ListItem>" + CStr(dt.Rows(i).Item("Name")) + "</asp:ListItem>" 
        End If

I know the above loop isnt going to add the listItems, how do I add the checked ListItems in my loop? Any help would be appreciated. Thanks

I know there is a way to check if a box is checked such as doing

check1.Items(i).Selected 

How do you check if it is not checked? Something like this?:

check1.Items(i).Selected = False

Answer 1

You can add items to the CheckBoxList by using CheckBoxList.Items.Add(ListItem). ListItem has a property Selected for the checked state:

For Each row As DataRow In dt.Rows
    Dim name = row.Field(Of String)("Name")
    Dim isValid = row.Field(Of Boolean)("isValid")
    Dim item = New ListItem(name)
    item.Selected = isValid
    check1.Items.Add(item)
Next