/// <summary>
/// Выбор одного варианта из списка.
/// </summary>
/// <typeparam name="TResult"></typeparam>
/// <param name="header">Header для вопроса.</param>
/// <param name="results">Список вариантов.</param>
/// <param name="footer">Footer для вопроса.</param>
/// <param name="getName">Получения имени для вывода</param>
/// <returns></returns>
public static TResult Choose <TResult>(
IEnumerable <TResult> results,
Func <TResult, string> getName,
string header = null,
string footer = null)
{
var arrayResult = results.ToArray();
if (!arrayResult.Any())
{
throw new ArgumentOutOfRangeException(nameof(results));
}
int selectedIndex;
do
{
if (!string.IsNullOrEmpty(header))
{
SysConsole.WriteQuestionLine(header);
}
for (int i = 0; i < arrayResult.Length; i++)
{
SysConsole.WriteLine($" {i + 1}) {getName(arrayResult[i])}");
}
if (!string.IsNullOrEmpty(footer))
{
SysConsole.WriteQuestionLine(footer);
}
SysConsole.Write($"Number between 1 and {arrayResult.Length}: ");
if (arrayResult.Length < 10)
{
selectedIndex = (int)char.GetNumericValue(Console.ReadKey().KeyChar) - 1;
Console.WriteLine();
}
else
{
var input = Console.ReadLine();
int.TryParse(input, out selectedIndex);
selectedIndex -= 1;
}
}while (selectedIndex < 0 || selectedIndex >= arrayResult.Length);
SysConsole.Write("Selected: ");
SysConsole.WriteInfoLine(getName(arrayResult[selectedIndex]));
Console.WriteLine();
return(arrayResult[selectedIndex]);
}
/// <summary>
/// Print <see cref="XPathNodeIterator"/> value.
/// </summary>
/// <param name="description">Result description.</param>
/// <param name="result">Evaluation result.</param>
protected static void Print(string description, object result)
{
Console.WriteLine();
SysConsole.WriteInfoLine(description);
if (result == null)
{
return;
}
var iterator = result as XPathNodeIterator;
if (iterator != null)
{
while (iterator.MoveNext())
{
var current = iterator.Current;
Console.WriteLine(current.Value);
}
}
else
{
Console.WriteLine(result);
}
}
