/// <summary>
/// 字符拼接
/// </summary>
/// <typeparam name="T">要拼接的对象类型</typeparam>
/// <param name="enumerator">迭代器</param>
/// <param name="separator">分隔符</param>
/// <param name="logic">处理逻辑</param>
/// <returns></returns>
public static string Join <T>(this IEnumerator enumerator, string separator, StringJoinAction <T> logic)
{
if (enumerator == null)
{
return(String.Empty);
}
StringBuilder buf = new StringBuilder();
if (logic != null)
{
while (enumerator.MoveNext())
{
if (enumerator.Current != null)
{
var s = logic((T)enumerator.Current);
if (s != null)
{
buf.Append(s);
buf.Append(separator);
}
}
}
}
else
{
while (enumerator.MoveNext())
{
if (enumerator.Current != null)
{
buf.Append(enumerator.Current.ToString());
buf.Append(separator);
}
}
}
if (buf.Length > 0)
{
var re = buf.ToString();
return(re.Substring(0, re.Length - separator.Length));
}
return(String.Empty);
}
/// <summary>
/// 字符拼接
/// </summary>
/// <typeparam name="T">要拼接的对象类型</typeparam>
/// <param name="els">要拼接的对象</param>
/// <param name="separator">分隔符</param>
/// <param name="logic">处理逻辑</param>
/// <returns></returns>
public static string Join <T>(this IEnumerable <T> els, string separator, StringJoinAction <T> logic)
{
return(els.GetEnumerator().Join <T>(separator, logic));
}