string[] things= new string[] { "105", "101", "102", "103", "90","a","B" ,"A","b"};
foreach (var thing in things.OrderBy(x => x))
{
Console.WriteLine(thing);
}
输出: 101,102,103,105,90,a,A,b,B
目标输出： 90,101,102,103,105,a,A,b,B
foreach (var thing in things.OrderBy(x => x, new SemiNumericComparer()))
{
Console.WriteLine(thing);
}
public class SemiNumericComparer: IComparer<string>
{
public int Compare(string s1, string s2)
{
if (IsNumeric(s1) && IsNumeric(s2))
{
if (Convert.ToInt32(s1) > Convert.ToInt32(s2)) return 1;
if (Convert.ToInt32(s1) < Convert.ToInt32(s2)) return -1;
if (Convert.ToInt32(s1) == Convert.ToInt32(s2)) return 0;
}
if (IsNumeric(s1) && !IsNumeric(s2))
return -1;
if (!IsNumeric(s1) && IsNumeric(s2))
return 1;
return string.Compare(s1, s2, false);
}
public static bool IsNumeric(object value)
{
try {
int i = Convert.ToInt32(value.ToString());
return true;
}
catch (FormatException) {
return false;
}
}
}