HELP! Listview not working with edit button ASP.NET

DJOuk

Posted this on Asp.Net, seems to be a hard problem, I still can't work it out

I have a edit button, this works fine, until I add the code that prevents the edit button from being seen by users who did not post that ticket. I cannot understand why this is happening. I get an error on the button says 'object reference not set in instance of object'

It happens when I add the following code:

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protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)

    {

        HiddenField commentidfield = e.Item.FindControl("commentidfield") as HiddenField;

        HiddenField userloginfield = e.Item.FindControl("userloginfield") as HiddenField;
 
        ImageButton votebutton = e.Item.FindControl("commentvotebutton") as ImageButton;

        ImageButton editbutton = e.Item.FindControl("editbutton") as ImageButton;
 
        if (HttpContext.Current.User.Identity.IsAuthenticated == true)

        {

            int commentidtemp = Convert.ToInt32(commentidfield.Value);

            int userloginid = Convert.ToInt32(userloginfield.Value);
 
            int commentcheck = Convert.ToInt32(commentratingclass.CheckCommentVote(Profile.userid, commentidtemp).GetValueOrDefault(0));

            int editcheck = Convert.ToInt32(commentclass.checkcommentbyuserid(Profile.userid, commentidtemp).GetValueOrDefault(0));
 
            if (userloginid == Profile.userid)

            {

                votebutton.Visible = false;

            }

            else if (commentcheck > 0)

            {

                votebutton.ImageUrl = "Images/commentvoted.png";

                votebutton.Enabled = false;

            }

            else

            {

                votebutton.ImageUrl = "Images/commentvote.png";

                votebutton.Enabled = true;

            }
 
            if (editcheck == 0)

            {

                editbutton.Visible = false;

            }

            else

            {

                editbutton.Visible = true;

            }

        }

        else

        {

            votebutton.Visible = false;

            editbutton.Visible = false;

        }
 
    }

Listview:

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1    <asp:ListView ID="ListView1" runat="server" DataKeyNames="CommentID" DataSourceID="SqlDataSource1"

2                    OnItemDataBound="ListView1_ItemDataBound" 

3                    onitemupdating="ListView1_ItemUpdating">

4                    <LayoutTemplate>

5                        <table runat="server">

6                            <tr runat="server">

7                                <td runat="server">

8                                    <table id="itemPlaceholderContainer" runat="server" border="0" style="">

9                                        <tr id="itemPlaceholder" runat="server">

10                                       </tr>

11                                   </table>

12                               </td>

13                           </tr>

14                           <tr runat="server">

15                               <td runat="server" style="">

16                                   <center>

17                                       <asp:DataPager ID="DataPager1" runat="server">

18                                           <Fields>

19                                               <asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" ShowNextPageButton="False"

20                                                   ShowPreviousPageButton="False" />

21                                               <asp:NumericPagerField />

22                                               <asp:NextPreviousPagerField ButtonType="Button" ShowLastPageButton="True" ShowNextPageButton="False"

23                                                   ShowPreviousPageButton="False" />

24                                           </Fields>

25                                       </asp:DataPager>

26                                   </center>

27                               </td>

28                           </tr>

29                       </table>

30                   </LayoutTemplate>

31                   <EmptyDataTemplate>

32                       <table runat="server" style="">

33                           <tr>

34                               <td>

35                                   No Answers! Add one Now!

36                               </td>

37                           </tr>

38                       </table>

39                   </EmptyDataTemplate>

40                   <EditItemTemplate>

41                    <table class="comments">

42                           <tr>

43                               <td class="commentsheader" rowspan="2">

44                                   <asp:Label ID="UserIDLabel" runat="server" Text='<%# Eval("Login") %>' />

45                                   answered:

46                                   <div id="details">

47                                       <br />

48                                       Rating:

49                                       <asp:Label ID="Usersratinglabel" runat="server" Text='<%#  Eval("Rating") %>' />

50                                       <br />

51                                       Posts:

52                                         <asp:Label ID="Usersanswers" runat="server" Text='<%#  Eval("Answers") %>' />

53                                       <asp:HiddenField ID="commentidfield" runat="server" Value='<%# Eval("CommentID") %>' />

54                                       <asp:HiddenField ID="userloginfield" runat="server" Value='<%# Eval("UserID") %>' />

55                               </td>

56                               <td class="commentsmain">

57                                   <asp:TextBox ID="updatetext" runat="server" Text='<%# Bind("Comment") %>' TextMode="MultiLine"

58                                       Width="500px" Height="150px" />

59                               </td>

60                           </tr>

61                           <tr>

62                               <td class="commentfooter">

63                                   <div class="commentfooter">

64                                       <asp:Button ID="updatebutton" runat="server" Text="Update"  CommandName="Update" />

65                                       <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="Cancel" />

66                               </td>

67                           </tr>

68                           </td> </tr>

69                       </table>

70                   </EditItemTemplate>

71                   <ItemTemplate>

72                       <table class="comments">

73                           <tr>

74                               <td class="commentsheader" rowspan="2">

75                                   <asp:Label ID="UserIDLabel" runat="server" Text='<%# Eval("Login") %>' />

76                                   answered:

77                                   <div id="details">

78                                       <br />

79                                       Rating:

80                                       <asp:Label ID="Usersratinglabel" runat="server" Text='<%#  Eval("Rating") %>' />

81                                       <br />

82                                       Posts:

83                                       <asp:Label ID="Usersanswers" runat="server" Text='<%#  Eval("Answers") %>' />

84                                       <asp:HiddenField ID="commentidfield" runat="server" Value='<%# Eval("CommentID") %>' />

85                                       <asp:HiddenField ID="userloginfield" runat="server" Value='<%# Eval("UserID") %>' />

86                               </td>

87                               <td class="commentsmain">

88                                   <asp:Label ID="CommentLabel" runat="server" Text='<%# Eval("Comment") %>' />

89                               </td>

90                           </tr>

91                           <tr>

92                               <td class="commentfooter">

93                                   <asp:ImageButton ID="editbutton" CommandName="Edit" runat="server" ImageUrl="Images/commentedit.png" />

94                                   <asp:ImageButton ID="commentvotebutton" runat="server" OnCommand="commentvote_Click" ImageUrl="Images/commentvote.png"

95                                       CommandArgument='<%# Eval("CommentID") %>' CommandName="commentvote" />

96                               </td>

97                           </tr>

98                           </td> </tr>

99                       </table>

100                  </ItemTemplate>

101              </asp:ListView>

HELP! Listview not working with edit button ASP.NET

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