Web Scheduler for managing timed jobs with ASP.NET pages

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="jobs._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        Welcome to Schedule Tasks!
    </h2>
    <asp:GridView ID="gridJobs" runat="server" CellPadding="4" 
        EnableModelValidation="True" ForeColor="#333333" GridLines="None" 
        AutoGenerateColumns="False" Width="100%">
        <AlternatingRowStyle BackColor="White" />
        <Columns>
            <asp:BoundField DataField="id" HeaderText="id" />
            <asp:BoundField DataField="description" HeaderText="description" ItemStyle-Width="100" />
            <asp:BoundField DataField="schedule" HeaderText="schedule" />
            <asp:BoundField DataField="next_run" HeaderText="next_run" DataFormatString="{0:yyyy-MM-dd HH:mm}" ItemStyle-Width="120" />
            <asp:BoundField DataField="last_run" HeaderText="last_run" DataFormatString="{0:yyyy-MM-dd HH:mm}" ItemStyle-Width="120" />
            <asp:BoundField DataField="status" HeaderText="status" ItemStyle-Width="80" />
            <asp:BoundField DataField="enabled" HeaderText="enabled" />
            <asp:TemplateField HeaderText="action" ItemStyle-Width="260">
                <ItemTemplate>
                    <asp:Button ID="btnEdit" runat="server" Text="edit" onclick="btnEdit_Click" />
                    <asp:Button ID="btnEnableDisable" runat="server" Text="enable/disable" onclick="btnEnableDisable_Click" OnClientClick="return confirm('Are you sure you want to perform the operation?')" />
                    <asp:Button ID="btnDelete" runat="server" Text="delete" onclick="btnDelete_Click" OnClientClick="return confirm('Are you sure you want to delete this job?')" />
                    <asp:Button ID="btnRun" runat="server" Text="run" onclick="btnRun_Click" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <EditRowStyle BackColor="#2461BF" />
        <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
        <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
        <RowStyle BackColor="#EFF3FB" />
        <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
    </asp:GridView>
    <asp:Button ID="btnCreateJob" runat="server" Text="Create Job" PostBackUrl="~/CreateJob.aspx" />
</asp:Content>