so I have updated a table for a class project (given to me that had work completed on it from previous students) and am now unable to view the data for the income statement page that it is used for. The columns I renamed/updated were previously 2012-2015 and now are 2020-2023.[enter image description here](https://i.sstatic.net/51flQsFH.png)
enter image description here

aspx file snippet

<h5>Select A Company</h5>
                            <div class="row-fluid">
                                <div class="span6">
                                    <asp:SqlDataSource ID="SqlDSCompany" runat="server" ConnectionString="<%$ ConnectionStrings:CPAConnectionString %>" SelectCommand="SELECT [CompanyName] FROM [Company]"></asp:SqlDataSource>
                                    <asp:DropDownList ID="DDLCompany" runat="server" DataSourceID="SqlDSCompany" DataTextField="CompanyName" DataValueField="CompanyName" AppendDataBoundItems="True" AutoPostBack="true" OnSelectedIndexChanged="DDLCompany_SelectedIndexChanged">
                                        <asp:ListItem Value="" Text="Select Company"></asp:ListItem>
                                    </asp:DropDownList>
                                </div>
                            </div>
                            <div class="container">
                                <table class="default">
                                    <tr>
                                        <td class="tdTitle" width="25%">
                                            <h4><b>Period Ending</b></h4>
                                        </td>
                                        <!--<td width="14%">2019</td>-->
                                        <td width="14%">2020</td>
                                        <td width="14%">2021</td>
                                        <td width="14%">2022</td>
                                        <td width="14%">2023</td>
                                    </tr>
                                </table>
                                <table class="default">
                                    <tr>
                                        <td class="tdTitle" width="25%">
                                            <h5><b>Total Revenue:</b></h5>
                                        </td>
                                        <td width="14%">
                                            <asp:Label ID="lblTotalRevenue1" runat="server"></asp:Label></td>
                                        <td width="14%">
                                            <asp:Label ID="lblTotalRevenue2" runat="server"></asp:Label></td>
                                        <td width="14%">
                                            <asp:Label ID="lblTotalRevenue3" runat="server"></asp:Label></td>
                                        <td width="14%">
                                            <asp:Label ID="lblTotalRevenue4" runat="server"></asp:Label></td>
                                    </tr>
                                </table>

code-behind

Imports System.Data
Imports System.Data.SqlClient
Imports System.IO`

Partial Class IncomeStatement
    Inherits System.Web.UI.Page

    Dim query As String

    Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
        If Not IsPostBack Then
            LoadNoValues()
        End If
    End Sub
   
    Protected Function ConnectToDB(query As String) As SqlDataReader

        Dim strConn As String = GlobalVariables.DataSource


        'variables
        Dim connnection As SqlConnection = Nothing
        Dim cmd As SqlCommand = Nothing
        Dim result As SqlDataReader = Nothing
        '
        Dim strSQL As String = query
        connnection = New SqlConnection(strConn)
        cmd = New SqlCommand(strSQL, connnection)
        connnection.Open()
        result = cmd.ExecuteReader(CommandBehavior.CloseConnection)
        Return result
    End Function
   
    Protected Sub DDLCompany_SelectedIndexChanged(sender As Object, e As EventArgs)
        Dim result As SqlDataReader = Nothing
        Dim constructs As New List(Of String)()
        constructs = LoadConstruct()
        Try
            'sanitization for Company Name
            Dim Company As String = Trim(DDLCompany.SelectedValue)
            Dim CompanyName As String = Company
            Dim pattern As String = "[']"
            Dim replacement As String = ""
            Dim reg As New Regex(pattern)
            If reg.IsMatch(Company) Then
                Dim replaceCompany As String = reg.Replace(Company, pattern, replacement)
                CompanyName = replaceCompany
            End If

            If DDLCompany.SelectedValue IsNot "" Then
                For Each construct As [String] In constructs
                    query = "SELECT * FROM IncomeStatement WHERE Company = @CompanyName AND FinancialConstruct = @Construct"
                    result = ConnectToDB(query)

                    If result.Read() Then
                        'does not work after updating columns in IncomeStatement table
                        'unsure what is causing data not to display
                        Dim value1 As String = If(result.Item("Y2020") = 0, "-", result.Item("Y2020"))
                        Dim value2 As String = If(result.Item("Y2021") = 0, "-", result.Item("Y2021"))
                        Dim value3 As String = If(result.Item("Y2022") = 0, "-", result.Item("Y2022"))
                        Dim value4 As String = If(result.Item("Y2023") = 0, "-", result.Item("Y2023"))

                        'works
                        'Dim value1 As String = If(result.Item("Y2012") = 0, "-", result.Item("Y2012"))
                        'Dim value2 As String = If(result.Item("Y2013") = 0, "-", result.Item("Y2013"))
                        'Dim value3 As String = If(result.Item("Y2014") = 0, "-", result.Item("Y2014"))
                        'Dim value4 As String = If(result.Item("Y2015") = 0, "-", result.Item("Y2015"))
                        SetLabelValues(construct, value1, value2, value3, value4)
                    End If
                Next
            Else
                LoadNoValues()
            End If
        Catch ex As Exception
            Console.WriteLine(ex)
        End Try
    End Sub
    
    Private Function LoadConstruct() As List(Of String)

        'Return constructs
        Dim constructs As New List(Of String)()
        query = "Select Distinct FinancialConstruct From IncomeStatement"
        Dim result As SqlDataReader = ConnectToDB(query)

        For Each row In result
            constructs.Add(row("FinancialConstruct"))
        Next
        Return constructs
    End Function
  Private Sub SetLabelValues(constructor As String, value1 As String, value2 As String, value3 As String, value4 As String)`
        Select Case constructor
            Case "Total Revenue"
                lblTotalRevenue1.Text = If(value1 = "-", value1, FormatCurrency(value1))
                lblTotalRevenue2.Text = If(value2 = "-", value2, FormatCurrency(value2))
                lblTotalRevenue3.Text = If(value3 = "-", value3, FormatCurrency(value3))
                lblTotalRevenue4.Text = If(value4 = "-", value4, FormatCurrency(value4))
                Exit Select
            Case "Cost of Revenue"
                lblCostofRevenue1.Text = If(value1 = "-", value1, FormatCurrency(value1))
                lblCostofRevenue2.Text = If(value2 = "-", value2, FormatCurrency(value2))
                lblCostofRevenue3.Text = If(value3 = "-", value3, FormatCurrency(value3))
                lblCostofRevenue4.Text = If(value4 = "-", value4, FormatCurrency(value4))
                Exit Select
...

 Private Sub LoadNoValues()
        lblTotalRevenue1.Text = "-"
        lblTotalRevenue2.Text = "-"
        lblTotalRevenue3.Text = "-"
        lblTotalRevenue4.Text = "-"

        lblCostofRevenue1.Text = "-"
        lblCostofRevenue2.Text = "-"
        lblCostofRevenue3.Text = "-"
        lblCostofRevenue4.Text = "-"
...

I was expecting the updated columns and updated years to work, but did not. I have tried using Chrome and Firefox with cleared cache. I also cleared the cache in visual studio as well. I was also thinking of refactoring to just have one label per year of each field so it wouldn’t need so many.