Response.Write(Convert.ToInt32("94")); Response.Write("<br/>"); Response.Write(Convert.ToInt32(94.5)); //會四捨六入五成雙 Response.Write("<br/>"); Response.Write((94.5).ToString("N0")); //會四捨五入 Response.Write("<br/>"); Response.Write((95.5).ToString("N0")); //會四捨五入 Response.Write("<br/>"); Response.Write(Convert.ToInt32(null)); //會 return 0 Response.Write("<br/>"); Response.Write(Convert.ToInt32("94.55")); //會有 exception 要先轉成 double 之類的數值 Response.Write("<br/>");