Zi 字媒體

C# 數字轉字串補0 & 字串補0 數字轉字串補0: this.f1_textBox2.Text = String.Format(“{0:0000000000000000}”, (Convert.ToInt16(this.f1_textBox2.Text) + 1));   字串補0: string str = “9”; str.PadLeft(4, ‘0’);//–>0009 str.PadRight(4, ‘0’);//–>9000