TimeSpan格式
timespant=new timespan (31,8,24,1 ); stringC1=t.tostring(@'d ).hh(:mm ).ss ); //31.08:24.01 string C2=t.tostring (' c ); //31.08:24336001 string C3=t.tostring (' g ); //31:8336024336001 string C4=t.tostring (' g ); //31336008336024336001.0000000 string C5=t.tostring (@ ' hh (: mm (: ss ' ) ); //08336024336001 stringc6=t.tostring (' % m ' min.' ); //24 min。