检查给定日期是不是存在于从日期到今天之间

Posted 2023-03-12

【中文标题】检查给定日期是不是存在于从日期到今天之间

【英文标题】：check the given date is present between fromdate to todate检查给定日期是否存在于从日期到今天之间

【发布时间】：2012-02-25 22:07:41

【问题描述】：

我的数据集格式是这样的

EMPNAME      FRMDATE      TODATE
ANU          01-10-2012   01-20-2012 
HARI         01-05-2012   02-05-2012

现在通过文本框获取特定员工的输入，例如 01-17-2012。

我的问题是：如何检查 i/p 日期是否在数据集中这两列 (FRMDATE,TODATE) 之间？

【参考方案1】：

试试这个

DataRow []_dr= ds.Tables[0].Select( inputDate +">= FRMDATE AND "+inputDate +" <= TODATE");

【参考方案2】：

我相信以下方法会对您有所帮助，有关比较日期的更多阅读材料，请查看以下两个主题：

Using linq or lambda to compare dates

Check if datetime instance falls in between other two datetime objects

using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;


public bool IsDateInRange(string date, string employeeId)

    DateTime dateToCompare = DateTime.MinValue;
    bool isInRange = false;

    if (!String.IsNullOrEmpty(date) && !String.IsNullOrEmpty(employeeId) &&
        DateTime.TryParse(date, out dateToCompare))
    
        DataTable table = new DataTable();
        string connectionString = WebConfigurationManager.ConnectionStrings["conn"].ConnectionString;
        using (SqlConnection connection = new SqlConnection(connectionString))
        
            connection.Open();
            using (SqlCommand command = new SqlCommand())
            
                command.Connection = connection;
                command.CommandText = "SELECT TOP 1 * FROM EmployeeDates WHERE EMPNAME = @EmpName";
                command.Parameters.AddWithValue("@EmpName", employeeId);
                SqlDataAdapter adapter = new SqlDataAdapter(command);
                adapter.Fill(table);

                DateTime fomDate = (DateTime)table.Rows[0]["FRMDATE"];
                DateTime toDate = (DateTime)table.Rows[0]["TODATE"];

                //DateTime.Ticks converts a date into long
                //Now you can simply compare whether the input date falls between the required range
                if (dateToCompare.Ticks >= fomDate.Ticks && dateToCompare.Ticks <= toDate.Ticks)
                
                    isInRange = true;
                
                connection.Close();
            
        
    
    return isInRange;

【参考方案3】：

db.ClubPorsant.Where(p => p.CreateDate>= _FromDate && p.CreateDate p.MablaghVariz).ThenByDescending(p => p.Shomarehesab).ToList() ;