提供了常用数据类型转换、常用方法封装等：
1）所有的扩展方法在使用时无需判断NULL或DBNull；
2）所有的类型转换方法均提供默认值功能，当转换的对象为空或转换异常时，会返回该默认值。
public class Program
{
static void Main(string[] args)
{
ConvertTest();
NullTest();
DataSetTest();
PatternTest();
DateTimeFormatTest();
}
private static void ConvertTest()
{
int number = "12".To<int>(); // Returns: 12
number = "TestDefaultValue".To<int>(-1); // Returns: -1 (The default value)
number = 3.14f.To<int>(); // Returns: 3
float numeric1 = "3.14".To<float>(); // Returns: 3.14
double numeric2 = "3.14".To<double>(); // Returns: 3.14
bool boolean = 1.To<bool>(); // Returns: true
boolean = "0".To<bool>(); // Returns: false
boolean = "1".To<bool>(); // Returns: true
boolean = "2".To<bool>(); // Returns: false
boolean = "false".To<bool>(); // Returns: false
string text = "EAF90998-1F75-4858-B139-90CD6407BF48";
Guid guid = text.To<Guid>(); // Returns: Guid("EAF90998-1F75-4858-B139-90CD6407BF48")
text = "2017-01-01";
DateTime dateTime = text.To<DateTime>(); // Returns: 2017-01-01 00:00:00
text = "2017-01-01 10:11:12";
dateTime = text.To<DateTime>(); // Returns: 2017-01-01 10:11:12
}
private static void NullTest()
{
object obj = null;
bool boolean = obj.IsNull(); // Returns: true
obj = DBNull.Value;
boolean = obj.IsNull(); // Returns: true
obj = string.Empty;
boolean = obj.IsNull(); // Returns: true
obj = " ";
boolean = obj.IsNull(); // Returns: true
obj = "Hello, Extension.Net!";
boolean = obj.NotNull(); // Returns: true
}
private static void DataSetTest()
{
DataSet set = null;
DataTable table = set.GetFirstTable();
DataRow row = set.GetFirstRow();
string code = set.GetFirstCell<string>();
code = table.GetFirstCell<string>();
code = row.GetFirstCell<string>();
User user = row.ToModel<User>(ToUser);
List<User> users = table.ToModels<User>(ToUser);
users = set.ToModels<User>(ToUser);
}
private static void PatternTest()
{
string pattern = @"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$";
bool boolean = "hello@world.com".IsPattern(pattern);
}
private static void DateTimeFormatTest()
{
string text = DateTime.Now.ToBigDateTime(); // Returns: 2017-07-01 17:20:09
text = DateTime.Now.ToSmallDateTime(); // Returns: 17-7-1 17:20:9
text = DateTime.Now.ToBigDate(); // Returns: 2017-07-01
text = DateTime.Now.ToSmallDate(); // Returns: 17-7-1
text = DateTime.Now.ToBigTime(); // Returns: 17:20:09
text = DateTime.Now.ToSmallTime(); // Returns: 17:20:9
text = DateTime.Now.ToBigDateTime("", "", ""); // Returns: 20170701172009
text = DateTime.Now.ToBigDateTime("/", "@", ":"); // Returns: 2017/07/01@17:20:09
}
private static User ToUser(DataRow row)
{
User user = new User();
// Converts from DataRow to User
return user;
}
}