关于C#的强制转换和尝试转换的方法

 1 public string ObjectToString(object ob)
 2 {
 3     string str = string.Empty;
 4     if (ob is string[])
 5     {
 6         string[] strList = (string[])ob; 
 7     }
 8 
 9     return str;
10 }

1 public DateTime StringToDateTime(string str)
2 {
3     DateTime dateTime = new DateTime();
4     if (DateTime.TryParse(str, out dateTime))
5     {
6         return dateTime;
7     }
8     return dateTime;
9 }