If I understand you right:
string[] strings = { "IDA0230332", "This is a string", "The number is 8", "Hello+sd","55#5"};
foreach (string str in strings)
{
Console.Write(str + "\t\t");
string reg = @"^(\w|\s)*$";
if (Regex.IsMatch(str, reg))
{
Console.WriteLine("match");
}
else { Console.WriteLine(); }
}