Question

This is my code:

public void refresh_SID(string callsign) {
    // zjistime si vsechny potrebne informace o danem letu
    XmlNodeList lety = airplanes.SelectNodes("/vEsup/flights/LKPR/odlety/let");
    XmlNodeList sids = airports.SelectNodes("/vEsup/config/airports/LKPR/sidstar/sids/sid");
    XmlNodeList getQfu = airplanes.SelectNodes("/vEsup/airports/airport/");
    MessageBox.Show(callsign);
    foreach (XmlNode let in lety) {
        if(let.Attributes.GetNamedItem("callsign").Value == callsign) {
            string adep = let.Attributes.GetNamedItem("adep").Value;
            foreach(XmlNode letiste in getQfu) {
                if(adep == letiste.Attributes.GetNamedItem("icao").Value);
                string qfu = letiste.Attributes.GetNamedItem("rwy").Value;
            }
            string depRunway = let.Attributes.GetNamedItem("deprwy").Value; 
            string type = let.Attributes.GetNamedItem("type").Value;
            string exitpoint = let.Attributes.GetNamedItem("exitpoint").Value;
            string rules = let.Attributes.GetNamedItem("rules").Value;
            ComboBox sidRoute = new ComboBox();
            Load_SID(depRunway, qfu, type, exitpoint, rules, sids, sidRoute);
        }
    }
}

Unfortunately, I can’t merge the two foreach loops in one, because in the second, I need to use the adep string I get in the first one, and I need the second to be a separate foreach loop as it has to check different part of the XML file. So now, when calling the Load_SID method, the qfu doesn’t exist. Any way to get it there?

Answer 1

You get error doesn’t exist because variable qfu is not in the scope when you invoke method Load_SID.

Try this:

    ...
    string adep = let.Attributes.GetNamedItem("adep").Value;
    string qfu = string.Empty;
    foreach(XmlNode letiste in getQfu)
    {
       if(adep == letiste.Attributes.GetNamedItem("icao").Value);
            qfu = letiste.Attributes.GetNamedItem("rwy").Value;
    }
    ...