Question

I am attempting to loop through an array of numbers, match them to the checkbox they they are associated with, and checkmark that box.

My checkbox is set up like:

<input type="checkbox" runat="server" id="someID" name="somename" value="1234" />

My code when the page loads currently looks like:

foreach (string interest in interests_Var){
   foreach (var c in Page.Controls)
   {
   }
}

interests_Var is my array containing different numbers. We’ll assume one of them is 1234. While looping through the page controls, I want to compare the value of the control to my number. If it equals my number, I want to then apply the attribute checked="checked". I’m assuming I have to find the ID of the control I am using, then use that ID to add a new attribute. Or is there a way I can add the attribute using the c variable?

I’m not dead set on this setup, so if you know a better way, I’m all ears. Thanks for any help and suggestions.

Thanks

Lots of good suggestions. I will try these in a bit. Got side-tracked on another project.

Solved

Ok, so here’s my end code. Thanks for the help James.

foreach (string interest in interests_Var)
{
       foreach (var chkCtrl in Panel1.Controls.OfType<CheckBox>())
       {
           if (chkCtrl.Attributes["value"].ToString() == interest.ToString())
          {
               chkCtrl.Checked = true;
          }
     }
}

Answer 1

You would be best served putting the CheckBox controls into a Panel or a PlaceHolder, because then you won’t have to worry about recursive logic to traverse the control hierarchy.

<asp:Panel ID="Panel1" runat="server">
    <asp:CheckBox ID="CheckBox1" runat="server" Text="Testing" value="1234" />
    ...
</asp:Panel>

By putting the controls into a container, you can just loop through the child controls of that element:

foreach (string interest in interests_Var)
{
    foreach (var chkCtrl in Panel1.Controls.OfType<CheckBox>())
    {
        chkCtrl.Checked = chkCtrl.Attributes["value"].Contains(interest.ToString());
    }
}

Assuming interests_Var is a List, here’s a shorter way to do it using LINQ:

interests_Var.ForEach(str => plcInvoiceDetail.Controls.OfType<CheckBox>()
    .Select(chk => chk.Checked = chk.Attributes["value"] == str));