Saturday, 16 November 2013

Detecting sequence of at least n sequential/Consecutive Dates from a given List in ASP.NET using C# or VB.NET

Hi friends,in this article i will explain about Detecting sequence of at least n sequential/Consecutive Dates from a given List in ASP.NET using C# or VB.NET.
I already explained about CSS - Gmail-style progress bar when page is loading,ASP.NET AjaxFileUpload Control With Progress Bar using C# or VB.NET,How To Use the AdRotator Control in an ASP.NET Application and  How to Get Previous page URL using JQuery or C#/VB.NET in ASP.NET

ASP.NET:
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Detecting sequence of at least n sequential Dates from a given List in ASP.NET using C#/VB.NET</title>  
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="btn" runat="server" Text="cSharp" onclick="btn_Click"  />
    </div>
    </form>
</body>
</html>


In C#.NET:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

public partial class Test : System.Web.UI.Page
{
    protected void btn_Click(object sender, EventArgs e)
    {
        List<DateTime> dates = new List<DateTime>(){
            new DateTime(2013,4,21),
            new DateTime(2013,4,23),
            new DateTime (2013,4,20),
            new DateTime(2013,4,14),
             new DateTime(2013,4,24),
             new DateTime(2013,4,18)
        };
        DateTime vacationDateToCheck = new DateTime(2013,4,22);
        DateTime expectedDate = vacationDateToCheck.AddDays(1);
        //if (vacationDateToCheck.DayOfWeek == DayOfWeek.Friday)
        expectedDate = expectedDate.AddDays(2);
        DateTime startDate = vacationDateToCheck;
        DateTime endDate = vacationDateToCheck;
        dates.Add(vacationDateToCheck);
        dates.Sort();
        int count = 0;
        int n = 4;      
        for (int i=0; i < dates.Count; i++)
        {
          
            if ((i > 0) && (i<dates.Count-1))
            {
  if (((dates[i] - dates[i - 1]).TotalDays == 1) && ((dates[i+1] - dates[i ]).TotalDays == 1)_ && dates[i]==vacationDateToCheck)
                {
                    count = count + 1;
                    for (int k = 0; k < dates.Count ; k++)
                        {
                            if (i + k+1  < dates.Count)
                            {
                            
                            if (((dates[i + k + 1] - dates[i]).TotalDays == k+1))
                            {
                              
                              count = count + 1;
                            }
                            }
                        }
                    for (int s = 0; s < dates.Count ; s++)
                    {
                     
                            if (i - s  > 0)
                            {
                               
                                if (((dates[i] - dates[i - s - 1]).TotalDays == s+1))
                                {
                                    
                                    count = count + 1;
                                }
                            }
                        }
                    }
                }
            }
        Response.Write(count);
         
        }

}


In VB.NET:
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Data
Imports System.Data.SqlClient

Partial Public Class Test
    Inherits System.Web.UI.Page
    Protected Sub btn_Click(ByVal sender As Object, ByVal e As EventArgs)
        Dim dates As New List(Of DateTime)() From { _
         New DateTime(2013, 4, 21), _
         New DateTime(2013, 4, 23), _
         New DateTime(2013, 4, 20), _
         New DateTime(2013, 4, 14), _
         New DateTime(2013, 4, 24), _
         New DateTime(2013, 4, 18) _
        }
        Dim vacationDateToCheck As New DateTime(2013, 4, 22)
        Dim expectedDate As DateTime = vacationDateToCheck.AddDays(1)
        'if (vacationDateToCheck.DayOfWeek == DayOfWeek.Friday)
        expectedDate = expectedDate.AddDays(2)
        Dim startDate As DateTime = vacationDateToCheck
        Dim endDate As DateTime = vacationDateToCheck
        dates.Add(vacationDateToCheck)
        dates.Sort()
        Dim count As Integer = 0
        Dim n As Integer = 4
        For i As Integer = 0 To dates.Count - 1

            If (i > 0) AndAlso (i < dates.Count - 1) Then
                If ((dates(i) - dates(i - 1)).TotalDays = 1) AndAlso ((dates(i + 1) - dates(i)).TotalDays = 1) AndAlso dates(i) = vacationDateToCheck Then
                    count = count + 1
                    For k As Integer = 0 To dates.Count - 1
                        If i + k + 1 < dates.Count Then

                            If ((dates(i + k + 1) - dates(i)).TotalDays = k + 1) Then

                                count = count + 1
                            End If
                        End If
                    Next
                    For s As Integer = 0 To dates.Count - 1

                        If i - s > 0 Then

                            If ((dates(i) - dates(i - s - 1)).TotalDays = s + 1) Then

                                count = count + 1
                            End If
                        End If
                    Next
                End If
            End If
        Next
        Response.Write(count)

    End Sub

End Class



The output of the above code as shown in the below figure.


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