Question

I’m trying to count all the checkbox controls on a page, I’d like to be able to count them based on what css class they are (or any other ID field I can use to group ValidationGroup, etc). I’m still pretty green to c#. Here’s my code:

    protected void submitButton_Click(object sender, EventArgs e)
    {
        int numCbSelected = 0;
        foreach (CheckBox cb in Page.Controls)
        {
            numCbSelected = numCbSelected + 1;
        }
        errLabel.Text = numCbSelected.ToString();
    }

Answer 1

You’ll have to do some form of recursion to get all the checkboxes on the page

private int CountCheckboxes(Control control)
    {
        CheckBox checkBox = control as CheckBox;

        int count = 0;

        if (checkBox != null)
        {
            if(checkBox.CssClass == "SomeClass")
                count++;
        }

        foreach (Control child in control.Controls)
        {
            count += CountCheckboxes(child);
        }

        return count;
    }

Then call it

protected void submitButton_Click(object sender, EventArgs e)
{
    int numCbSelected = CountCheckboxes(Page)
    errLabel.Text = numCbSelected.ToString();
}