Getting XML data into combobox

Question

I have a windows form with 3 comboboxes and a XML file as following

Answer 1

I prefer to use Linq2XML:

Load the data into an XDocument:
Either load from file:

var xmlDocument = XDocument.Load(fileName);

or load from a string

var xmlDocument = XDocument.Parse( @"

    
        
            
                Ctrl
            
            
                Alt
            
            
                Shift
            
        
    
    
        
            
                Ctrl
            
            
                Alt
            
            
                Shift
            
        
    
    
        
            
                a
            
            
                b
            
            
                c
            
        
    
");

Then you can select desired items

var mainItems = from key in xmlDocument.Descendants("key1")
                select key.Value;
var secKeyItems = from key in xmlDocument.Descendants("key2")
                select key.Value;
var alphaItems = from key in xmlDocument.Descendants("key3")
                select key.Value;

You can now bind each combo to the selected result, like this:

comboBox1.DataSource = mainItems.ToList();

You might want to wash your XML (to remove newlines and spaces)

var mainItems = from key in xmlDocument.Descendants("key1")
                select key.Value.Trim();
var secKeyItems = from key in xmlDocument.Descendants("key2")
                select key.Value.Trim();
var alphaItems = from key in xmlDocument.Descendants("key3")
                select key.Value.Trim();