检查日期时间是周末或平日

<script Language="c#" runat="server"> 
    void Page_Load() 
    { 
    DateTime date = DateTime.Now; 
    dateToday.Text = " " + date.ToString("d"); 
    DayOfWeek day = DateTime.Now.DayOfWeek; 
    dayToday.Text = " " + day.ToString(); 

    if ((dayToday == DayOfWeek.Saturday) && (dayToday == DayOfWeek.Sunday)) 
    { 
    Console.WriteLine("This is a weekend"); 
    } 

} 
</script>

检查日期时间是周末或平日

使用日期时间，我想测试当前日期是否是工作日还是周末，那么我想打印给用户的响应。目前我收到运行时错误。如果我删除我的if语句，则第一项（当前日期和一周中的某一天）正确打印。

来源

2016-09-27 penmas

它不可能星期六_AND_星期日 –

您在if语句下面写错varable：中dayToday

if ((dayToday == DayOfWeek.Saturday) || (dayToday == DayOfWeek.Sunday)) 
{ 
    Console.WriteLine("This is a weekend"); 
}

而必须在条件中使用天 varable。

更新： 你也犯了错误的条件。必须有or而不是and。

来源

2016-09-27 04:32:49

这应该是一个OR条件。星期六和星期日都不能。 – neonScarecrow

@neonScarecrow，你是绝对正确的。我没有注意到这一点。 –

周末周五/周六，周六/周日等中东地区的人们如何？ –

if ((day >= DayOfWeek.Monday) && (day<= DayOfWeek.Friday)) 
{ 
    // action 
}

来源

2016-09-27 04:27:24 Sajeetharan

您从

if ((dayToday == DayOfWeek.Saturday) && (dayToday == DayOfWeek.Sunday))

比较你的ASP.NET标签 dayToday反对 DayOfWeek枚举元素，当然这失败

也许你想在你的if语句来代替dayToday与day，即

至

if ((day == DayOfWeek.Saturday) && (day == DayOfWeek.Sunday))

此外，你可能还需要更换逻辑“和”（&&）与逻辑“或”（||）终于

if ((day == DayOfWeek.Saturday) || (day == DayOfWeek.Sunday))

来源

2016-09-27 04:29:33 DAXaholic

谢谢指出！ – penmas

您收到一个错误，因为你是比较一个带有字符串的枚举。

// dayToday is a string 
// DayOfWeek.Saturday is an enum 
if ((dayToday == DayOfWeek.Saturday) && (dayToday == DayOfWeek.Sunday))

使用DayOfWeek.Saturday.ToString()与字符串进行比较。您还不想填充dayToday字符串。或者，使用day变量与枚举进行比较。

https://dotnetfiddle.net/gUGJ0J

using System; 

public class Program 
{ 
    public static void Main() 
    { 
     DateTime date = DateTime.Now; 

     string dateToday = date.ToString("d"); 
     DayOfWeek day = DateTime.Now.DayOfWeek; 
     string dayToday = day.ToString(); 

     // compare enums 
     if ((day == DayOfWeek.Saturday) || (day == DayOfWeek.Sunday)) 
     { 
      Console.WriteLine(dateToday + " is a weekend"); 
     } 
     else 
     { 
      Console.WriteLine(dateToday + " is not a weekend"); 
     } 

     // compare strings 
     if ((dayToday == DayOfWeek.Saturday.ToString()) || (dayToday == DayOfWeek.Sunday.ToString())) 
     { 
      Console.WriteLine(dateToday + " is a weekend"); 
     } 
     else 
     { 
      Console.WriteLine(dateToday + " is not a weekend"); 
     } 
    } 
}

来源

2016-09-27 04:31:40

非常感谢你帮助我理解我做错了什么！ – penmas

你需要把你的asp控件放在窗体标签里，runat =“server”。

<body> 
    <form id="frm" runat="server"> 
    <p> 
    Today's date is: <asp:Label ID="dateToday" runat="server" /> 
    <br/> 
    The day of the week is: <asp:Label ID="dayToday" runat="server" /> 
    <br/> 
    </form> 
</body>

Page_Load方法的签名在您的代码中不正确。你也应该使用Response.Write为asp网站，而不是Console.Writeline。当您检查星期几时，应该有OR（||）而不是AND（& &）。

<script language="c#" runat="server"> 
      protected void Page_Load(object sender, EventArgs e) 
      { 
       DateTime date = DateTime.Now; 
       dateToday.Text = " " + date.ToString("d"); 
       DayOfWeek day = DateTime.Now.DayOfWeek; 
       dayToday.Text = " " + day.ToString(); 

       if ((dayToday.Text == DayOfWeek.Saturday.ToString()) || (dayToday.Text == DayOfWeek.Sunday.ToString())) 
       { 
        Response.Write("This is a weekend"); 
       } 
      } 
     </script>

来源

2016-09-27 07:15:26

检查日期时间是周末或平日

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