This is a part of UpdateGUI():
DisplayOptions choice = (DisplayOptions)comboBox1.SelectedIndex;
seatMngr.GetSeatInfoStrings(choice, out strSeatInfoStrings);
listBox1.Items.Clear();
listBox1.Items.AddRange(strSeatInfoStrings);
The compiler is complaining about this row (And the parameter of the last row):
seatMngr.GetSeatInfoStrings(choice, out strSeatInfoStrings);
What I'm trying to do is to take an array (strSeatInfoStrings) and put it inside a listbox.
Any ideas?
You have to add the declaration of that variable before the call:
DisplayOptions choice = (DisplayOptions)comboBox1.SelectedIndex;
string[] strSeatInfoStrings;
seatMngr.GetSeatInfoStrings(choice, out strSeatInfoStrings);
listBox1.Items.Clear();
listBox1.Items.AddRange(strSeatInfoStrings);
The other oppinion is to change the signature of your method and return the values, so you can write this
DisplayOptions choice = (DisplayOptions)comboBox1.SelectedIndex;
listBox1.Items.Clear();
listBox1.Items.AddRange(seatMngr.GetSeatInfoStrings(choice));
GetSeatInfoStrings then this is the wrong scope. Declare it in the way I showed you in my sample above and simply use the out parameter in your method GetSetInfoStrings and you will see - it works.This smells more like a code design issue. The method name GetSeatInfoStrings clearly expresses that it returns some strings. Based on your use of the method, it looks like it's declared like so:
public void GetSeatInfoStrings(string choice, out string[] result)
In my opinion, it would be far better to declare it like this instead:
public void IEnumerable<string> GetSeatInfoStrings(string choice)
...and just return the array from the method as you normally would. The primary uses for out, as I see it is when you need to return more than one value from the method. The Int32.TryParse method is a great example; the method returns a bool indicating success, and the out parameter will contain the result.
In your case it seems as if you have one result, so using out will only be confusing.
outinstead of just returning the array from the method?