//Provide an index in the table for quick scrolling
public override String[] SectionIndexTitles(UITableView tableView)
{
if (loading)
{
return(null);
}
List <string> index = new List <string>();
List <string> artists = Songs.GetListOfArtists();
string lastChar = "";
foreach (string artist in artists)
{
string initialLetter = "";
if (artist.Length > 4 && artist.Substring(0, 4) == "The ")
{
initialLetter = artist.Substring(4, 1).ToUpper();
}
else if (artist.Length > 2 && artist.Substring(0, 2) == "A ")
{
initialLetter = artist.Substring(2, 1).ToUpper();
}
else if (artist.Length > 1)
{
initialLetter = artist.Substring(0, 1).ToUpper();
}
// Handle numbers first
if (artist.Length > 1 && numbers.Contains <string>(initialLetter) && !index.Contains("#"))
{
index.Add("#");
continue;
}
// Ignore artists that start with non-alphabetic characters
if (artist.Length > 1 && !alphabet.Contains <string>(initialLetter))
{
continue;
}
// Add new initial letter to List
if (initialLetter != lastChar)
{
lastChar = initialLetter;
index.Add(initialLetter);
}
}
return(index.ToArray());
}
// Get the section to scroll to when the side index is used
public override nint SectionFor(UITableView tableView, string title, nint atIndex)
{
List <string> artists = Songs.GetListOfArtists();
int section = 0;
foreach (string artist in artists)
{
string initialLetter = "";
if (artist.Length > 4 && artist.Substring(0, 4) == "The ")
{
initialLetter = artist.Substring(4, 1).ToUpper();
}
else if (artist.Length > 2 && artist.Substring(0, 2) == "A ")
{
initialLetter = artist.Substring(2, 1).ToUpper();
}
else if (artist.Length > 1)
{
initialLetter = artist.Substring(0, 1).ToUpper();
}
// Ignore non-alphanumeric characters
if (!alphabet.Contains <string>(initialLetter) && !numbers.Contains <string>(initialLetter))
{
section++;
continue;
}
// Is this the first artist with the initial letter equal to index letter (title parameter) or a number?
if (initialLetter == title || numbers.Contains <string>(initialLetter))
{
return(section);
}
else
{
section++;
}
}
return(0);
}
