如何將前導零添加到String.Format參數？

Question

我有以下代碼：

string textTransDate = String.Format("{0}-{1}-{2} {3}:{4}", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, DateTime.Now.Hour, DateTime.Now.Minute); 

我想前導零添加到月份和日期參數，如果它們都小於10，我將如何做到這一點？

Answer 1

string textTransDate = DateTime.Now.ToString("yyyy-MM-dd HH:mm"); 

此處瞭解詳情：

http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx

Answer 2

String.Format(@"{0:yyyy-MM-dd HH\:mm}", DateTime.Now); 

轉義字符\：確保你會得到一個文字冒號分隔符，而不是一個特定的文化時間分隔符，使其與原始代碼。見Custom Date and Time format strings in MSDN。

要獲得前導零的數值參數，看Custom Numeric Format Strings：

String.Format("{0:0000}-{1:00}-{2:00} {3:00}:{4:00}", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, DateTime.Now.Hour, DateTime.Now.Minute); 

甚至Standard Numeric Format Strings：如果需要

String.Format("{0:D4}-{1:D2}-{2:D2} {3:D2}:{4:D2}", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, DateTime.Now.Hour, DateTime.Now.Minute); 

Answer 3

D2格式增加了前導零。

String.Format("{0}-{1:D2}-{2:D2} {3}:{4}", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, DateTime.Now.Hour, DateTime.Now.Minute); 

http://msdn.microsoft.com/en-us/library/0c899ak8.aspx

Answer 4

string textTransDate = String.Format("{0}-{1:00}-{2} {3}:{4}", DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, DateTime.Now.Hour, DateTime.Now.Minute); 

Answer 5

這是不是工作：

string textTransDate = DateTime.Now.ToString("yy-MM-hh:mm");