如何在C＃中获取两个日期之间的所有日期 [英] How to get all the dates between two dates in C#

问题描述

我正在编写一个代码，该代码从用户获取两个日期并为该用户预订一个插槽，然后datepicker应禁用该日期，以便其他用户无法在同一天预订。我想到将所有日期存储在数组中并使datepicker禁用数组中的所有日期。如何编写代码来存储数组中的日期。这是我的代码给出了一个错误，Listtype无法转换为字符串[]。

I'm writing a code that takes two dates from the user and book a slot for that user and then the datepicker should disable that date so that other user cannot book the same day. I thought of storing all the dates in the array and making the datepicker disable all the dates in the array. How can I write my code To store The dates in array. Here Is my code which is giving me a error that Listtype cannot be converted into string[].

public List<DateTime> GetDatesBetween(DateTime startDate, DateTime endDate)
    {
        List<DateTime> allDates = new List<DateTime>();
        for (DateTime date = startDate; date <= endDate; date = date.AddDays(1))
            allDates.Add(date);
        return allDates;

    }
    protected void Button1_Click1(object sender, EventArgs e)
    {
        DateTime starting=new DateTime();
       starting=DateTime.ParseExact(datepicker.Value,"dd-MM-yyyy",null);
        DateTime ending=new DateTime();
       ending=DateTime.ParseExact(date2.Value,"dd-MM-yyyy",null);


      String[] dates = GetDatesBetween(starting, ending);  
      }

推荐答案

您不能只处理List< DateTime>作为DateTime值的数组，它不止于此。你必须转换它，这很简单。但是 - 你不想使用字符串，在处理基于日期的信息时它们真的不能比较好！

有三种方法可以解决这个问题：

1）更改方法以返回DateTime值数组：

You can't just treat a List<DateTime> as an array of DateTime values, it's more than that. You have to convert it, which is simple to do. But - you don't want to use strings, they really don't compare well when dealing with date based info!
There are three ways to deal with this:
1) Change the method to return an array of DateTime values:

public DateTime[] GetDatesBetween(DateTime startDate, DateTime endDate)
    {
    List<DateTime> allDates = new List<DateTime>();
    for (DateTime date = startDate; date <= endDate; date = date.AddDays(1))
    allDates.Add(date);
    return allDates.ToArray(); 
    }

2）在方法之外使用List：

2) Use a List outside the method:

protected void Button1_Click1(object sender, EventArgs e)
    {
    DateTime starting=new DateTime();
    starting=DateTime.ParseExact(datepicker.Value,"dd-MM-yyyy",null);
    DateTime ending=new DateTime();
    ending=DateTime.ParseExact(date2.Value,"dd-MM-yyyy",null);
    
    List<DateTime> dates = GetDatesBetween(starting, ending); 
    }

3）将List转换为方法之外的数组：

3) Convert the List to an array outside the method:

protected void Button1_Click1(object sender, EventArgs e)
    {
    DateTime starting=new DateTime();
    starting=DateTime.ParseExact(datepicker.Value,"dd-MM-yyyy",null);
    DateTime ending=new DateTime();
    ending=DateTime.ParseExact(date2.Value,"dd-MM-yyyy",null);
    
    DateTime[] dates = GetDatesBetween(starting, ending).ToArray(); 
    }

1）列表声明错误。

1) The list declaration was wrong.

public List<DateTime> GetDatesBetween(DateTime startDate, DateTime endDate)
{
    List<DateTime> allDates = new List<DateTime>();

    for (DateTime date = startDate; date <= endDate; date = date.AddDays(1))
    {
        allDates.Add(date.Date);
    }

    return allDates;
}

2）您可以使用ToArray（）方法将列表转换为数组

2) You can convert a list to an array by using the ToArray() method

DateTime[] dates = GetDatesBetween(starting, ending).ToArray();

我更正了你的代码。

I corrected your code.

用下面的代码更改你的代码。

Change your code with below.

public List<DateTime> GetDatesBetween(DateTime startDate, DateTime endDate)
        {
            List<DateTime> allDates = new List<DateTime>();
            for (DateTime date = startDate; date <= endDate; date = date.AddDays(1))
                allDates.Add(date.Date);
            return allDates;
        }

我希望您有使用datetimepicker禁用日期的代码。

I hope you have the code to disable Dates with datetimepicker.

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