how to remove xmlnode within a foreach loop?

Question

At the following code i use foreach loop to check each node in nodelist and remove some of them. after i remove one node the foreach loop throw the following error: \"The el

Answer 1

As you're not simply removing items from the collection you're looping over, I'm not sure if "use a for loop" will work.

The following takes two steps:

1. Create a regular list of all the elements you want to detach from their parents.
2. Detatch those elements from their parents - by iterating over the regular list, which isn't affected by the detachings.

public static XmlNodeList Scan(XmlNodeList nodeList)
{
    List toRemove = new List();

    foreach (XmlNode xmlElement in nodeList)
    {
        string elementValue = xmlElement.InnerText;
        if (elementValue.Length < 6 || elementValue.Substring(0, 3) != "999")
        {
            toRemove.Add(xmlElement);
        }
    }

    foreach(XmlNode xmlElement in toRemove)
    {
        XmlNode node = xmlElement.ParentNode;
        node.RemoveChild(xmlElement);
    }

    return nodeList;
}