How To Remove All Children In HtmlElement With Silverlight/C#

So I have this Silverlight application that calls some reports(.rdlc) via HTML form submit. This form is universal, so I use it to call all reports with it. Now I want to clear the

Solution 1:

You should never add or remove elements while inside a foreach loop, as the collection changes and invalidates the loop. Rather add all items to be removed in a separate list and then remove them in a second loop. (I haven't tested it because I do not have relevant sample code, but this is a common mistake with foreach loops.)

List<HtmlElement> toRemove = new List<HtmlElement>();
foreach (HtmlElement element in Form.Children)
{
    if (element.Id != string.Empty)
    {
        toRemove.Add(element);
    }
}
foreach (HtmlElement element in toRemove)
{
    Form.RemoveChild(element);
}

Alternatively, using your second approach, you can always add all your IDs to a list, and then add a RemoveAllFormInputs() method which loops over these elements.

Solution 2:

Peet has provided the correct answer, however some may prefer a Linq based approach that slims the code a litte.

foreach (HtmlElement element in Form.Children
                                    .OfType<HtmlElement>
                                    .Where(e => !String.IsNullOrEmpty(e.Id))
                                    .ToList() )
{
    Form.RemoveChild(element);
}