A Task Management System using Three Layer Architecture

<%@ Page Language="C#" AutoEventWireup="true" MasterPageFile="~/Master/MasterPage.master" MaintainScrollPositionOnPostback="true" CodeFile="TaskDetails.aspx.cs" Inherits="UI_TaskDetails" %>
<%@ MasterType VirtualPath="~/Master/MasterPage.master" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
 <%--<script type="text/javascript" src="../../Javascript/PageBackJScript.js">
    </script>
--%>
    <div>
    <asp:Label ID="Label1" runat="server" Font-Bold="True" Font-Size="Medium" Font-Underline="False"
            Text="Task Details :" Width="148px"></asp:Label>
        <hr />   
        <table style="width: 445px; height: 390px;">
            <tr>
                <td style="width: 80px">
                    <asp:Label ID="Label2" runat="server" Text="Task Id"></asp:Label></td>
                <td style="width: 10px">
                    <asp:Label ID="Label10" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td>
                    <asp:TextBox ID="taskIdTextBox" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 80px">
                    <asp:Label ID="Label3" runat="server" Text="Project Name" Width="104px"></asp:Label></td>
                <td style="width: 10px">
                    <asp:Label ID="Label11" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td>
                    <asp:TextBox ID="projectNameTextBox" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 80px">
                    <asp:Label ID="Label6" runat="server" Text="Task Name"></asp:Label></td>
                <td style="width: 10px">
                    <asp:Label ID="Label12" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td>
                    <asp:TextBox ID="taskNameTextBox" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 80px" valign="top">
                    <asp:Label ID="Label4" runat="server" Text="Task Description" Width="122px"></asp:Label></td>
                <td style="width: 10px" valign="top">
                    <asp:Label ID="Label13" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td>
                    <asp:TextBox ID="taskDescriptionTextBox" runat="server" TextMode="MultiLine" Width="213px"></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 80px">
                    <asp:Label ID="Label5" runat="server" Text="Task Creation Date" Width="145px"></asp:Label></td>
                <td style="width: 10px">
                    <asp:Label ID="Label14" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td>
                    <asp:TextBox ID="creationDateTextBox" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 80px">
                    <asp:Label ID="Label7" runat="server" Text="Task End Date" Width="105px"></asp:Label></td>
                <td style="width: 10px">
                    <asp:Label ID="Label15" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td>
                    <asp:TextBox ID="endDateTextBox" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 80px; height: 26px;">
                    <asp:Label ID="Label8" runat="server" Text="Task Owner"></asp:Label></td>
                <td style="width: 10px; height: 26px;">
                    <asp:Label ID="Label16" runat="server" Font-Bold="True" Font-Size="Large" Text=":"></asp:Label></td>
                <td style="height: 26px">
                    <asp:TextBox ID="taskOwnerTextBox" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td colspan="3">
                    <asp:Label ID="Label9" runat="server" Text="Comments"></asp:Label>
                    <hr />
                </td>
            </tr>
            <tr>
                <td colspan="3" rowspan="2" style="height: 130px">
                    <asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" AutoGenerateColumns="False" DataSourceID="commentObjectDataSource" Width="435px">
                        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
                        <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
                        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                        <EditRowStyle BackColor="#999999" />
                        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
                        <Columns>
                            <asp:BoundField DataField="CommentBody" HeaderText="Comment" SortExpression="CommentBody" />
                            <asp:BoundField DataField="CommentBy" HeaderText="Comment By" SortExpression="CommentBy" />
                            <asp:BoundField DataField="CommentDate" HeaderText="Comment Date" SortExpression="CommentDate" />
                            <asp:HyperLinkField DataNavigateUrlFields="Attachment" DataNavigateUrlFormatString="~/UI/Download.aspx?attachment={0}"
                                NavigateUrl="~/UI/Download.aspx" Target="_blank" Text="Download Attachment" />
                        </Columns>
                    </asp:GridView>
                    <asp:ObjectDataSource ID="commentObjectDataSource" runat="server" SelectMethod="SelectComments"
                        TypeName="CommentBLL">
                        <SelectParameters>
                            <asp:QueryStringParameter Name="taskId" QueryStringField="taskId" Type="String" />
                        </SelectParameters>
                    </asp:ObjectDataSource>
                </td>
            </tr>
            <tr>
            </tr>
            <tr>
                <td colspan="3" style="height: 21px">
                    <asp:LinkButton ID="createCommentLinkButton" runat="server" OnClick="createCommentLinkButton_Click">Create Comment</asp:LinkButton></td>
            </tr>
            <tr>
                
                 <td colspan="3">
                     <asp:Panel ID="ContainerPanel" runat="server" Height="50px" Width="125px">
                     <div>
                     <asp:TextBox ID="commntTextBox" runat="server" Height="71px" TextMode="MultiLine"
                        Width="409px"></asp:TextBox>
                     <asp:FileUpload ID="FileUpload1" runat="server" />
                    <asp:Button ID="createCommentButton" runat="server" Text="Comment" Width="82px" OnClick="createCommentButton_Click" />
                     </div>
                     </asp:Panel>
                    
               </td>
             </tr>
             <tr>
                
                 <td colspan="3">
                     <asp:Label ID="Label17" runat="server" Text="Forward To"></asp:Label>
                     <asp:Label ID="Label18" runat="server" Text=":" Font-Bold="True" Font-Size="Large"></asp:Label>&nbsp;<asp:DropDownList
                         ID="DropDownList1" runat="server" DataSourceID="projectUserObjectDataSource"
                         DataTextField="UserId" DataValueField="UserId">
                     </asp:DropDownList><asp:ObjectDataSource ID="projectUserObjectDataSource" runat="server"
                         SelectMethod="SelectUserOfProject" TypeName="ProjectBLL">
                         <SelectParameters>
                             <asp:ControlParameter ControlID="Label19" Name="projectId" PropertyName="Text" Type="String" />
                         </SelectParameters>
                     </asp:ObjectDataSource>
                 <asp:Button ID="forwardTaskButton" runat="server" Text="Forward Task" OnClick="forwardTaskButton_Click" />
                     <asp:Label ID="Label19" runat="server" Visible="False"></asp:Label></td>
                 </tr>
                 <tr>
                 <td colspan="3" align="center">
                     &nbsp;<asp:Label ID="statusLabel" runat="server" ForeColor="Red"></asp:Label>
                 </td>
                     
                 </tr>
                 <tr>
                 <td colspan="3" align="center">
                     <asp:Button ID="endTaskButton" runat="server" Text="End Task" Width="110px" />
                 </td>
                 </tr>
        </table>
    
    </div>
  </asp:Content>