本文給出了在C#中獲得當(dāng)月天數(shù)及常用的日期型格式處理方法。

1、如何獲得當(dāng)月有多少天

int m=System.DateTime.DaysInMonth(System.DateTime.Now.Year,System.DateTime.Now.Month);

2、日期型格式處理通用方法

（1）在global.asax中

protected void Application_BeginRequest(Object sender, EventArgs e)
        {
             Thread currentThread = Thread.CurrentThread;
            CultureInfo cul = currentThread.CurrentCulture.Clone() as CultureInfo;
            cul.DateTimeFormat.ShortDatePattern= BLLFacade.Common.GetShortDatePattern();
            cul.DateTimeFormat.LongDatePattern= BLLFacade.Common.GetLongDatePattern();
            cul.DateTimeFormat.ShortTimePattern= BLLFacade.Common.GetShortTimePattern();
            cul.DateTimeFormat.LongTimePattern= BLLFacade.Common.GetLongTimePattern();
            currentThread.CurrentCulture = cul;
      }

（2）在webconfig中配置如下

<add key="ShortDatePattern" value="MM-dd-yyyy" />
        <add key="LongDatePattern" value="dddd-MMMM dd-yyyy" />
        <add key="ShortTimePattern" value="hh:mm tt" />
        <add key="LongTimePattern" value="hh:mm tt" />

（3）在業(yè)務(wù)邏輯層中

public static string GetShortDatePattern()
       {
          return System.Configuration.ConfigurationSettings.AppSettings["ShortDatePattern"];
      }

public static string GetLongDatePattern()
       {
            return System.Configuration.ConfigurationSettings.AppSettings["LongDatePattern"];
       }

public static string GetShortTimePattern()
       {
             return System.Configuration.ConfigurationSettings.AppSettings["ShortTimePattern"];
       }

public static string GetLongTimePattern()
       {
             return System.Configuration.ConfigurationSettings.AppSettings["LongTimePattern"];
       }

然后在其他地方正常調(diào)用就可以了，如果需要修改格式只需要修改webconfig中的，且可以保證整個系統(tǒng)中的所有格式都是一致的。