多少分钟前

public string DateStringFromNow(DateTime dt)    
{    
TimeSpan span = DateTime.Now - dt;    
if (span.TotalDays >60)    
{    
return dt.ToShortDateString();    
}    
else
if ( span.TotalDays >30 )    
{    
return
"1个月前";    
}    
else
if (span.TotalDays >14)    
{    
return
"2周前";    
}    
else
if (span.TotalDays >7)    
{    
return
"1周前";    
}    
else
if (span.TotalDays >1)    
{    
return
string.Format("{0}天前", (int)Math.Floor(span.TotalDays));    
}    
else
if (span.TotalHours >1)    
{    
return
string.Format("{0}小时前", (int)Math.Floor(span.TotalHours));    
}    
else
if (span.TotalMinutes >1)    
{    
return
string.Format("{0}分钟前", (int)Math.Floor(span.TotalMinutes));    
}    
else
if (span.TotalSeconds >=1)    
{    
return
string.Format("{0}秒前", (int)Math.Floor(span.TotalSeconds));    
}    
else 
{    
return
"1秒前";    
}    
}