Decoding HTML and databinding into a ASP.NET repeater - asp.net

Question

I have a separate page where I use the Server.HTMLEncode feature to encode HTML a user has entered inside of a HTMLEditorExtender on a TextBox.
I am trying to insert this HTML into a repeater like so:
<asp:Repeater id="articleList" runat="server">
<ItemTemplate>
<div class="itemtemplate">
<h2><%#Container.DataItem("Title")%></h2>
<h5>Category:</h5> <%#Container.DataItem("Category")%><br />
<%#Container.DataItem("decodedHTML")%>
<%#Container.DataItem("UserName")%>
<%#Container.DataItem("DateOfPost")%>
</div>
</ItemTemplate>
<AlternatingItemTemplate>
<div class="altitemtemplate">
<h2><%#Container.DataItem("Title")%></h2>
<h5>Category:</h5> <%#Container.DataItem("Category")%><br />
<%#Container.DataItem("decodedHTML")%>
<%#Container.DataItem("UserName")%>
<%#Container.DataItem("DateOfPost")%>
</div>
</AlternatingItemTemplate>
</asp:Repeater>
And my code behind:
Sub displayArticles()
Dim conn As New OleDb.OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
conn.Open()
Dim cmd As New OleDbCommand("SELECT * FROM [UserArticles] ORDER BY DateOfPost DESC", conn)
Dim inputString As String = "HTMLBody"
Dim decodedHTML As String = Server.HtmlDecode(inputString)
articleList.DataSource = cmd.ExecuteReader()
articleList.DataBind()
conn.Close()
End Sub
"HTMLBody" is the name of the field in my database with the encoded HTML in.
Unfortunately, I am receiving the error
"IndexOutOfRangeException was unhandled by user code".
There is obviously a problem here referring to the string decodedHTML in my Container.DataItem statement, so what am I doing wrong?
EDIT: code from the other page where the html is encoded:
Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If String.IsNullOrEmpty(TextBox1.Text) Then
ErrorMessage.Visible = True
ErrorMessage.Text = "Your submission is blank. Please write your article first"
Else
Dim oleDbConn As New OleDb.OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
Dim SqlString As String = "Insert into UserArticles(Title,Category,UserName,DateOfPost,HTMLPost) Values (#f1,#f2,#f3,#f4,#f5)"
Dim HTMLEncode As String = Server.HtmlEncode(TextBox1.Text)
Dim cmd As OleDbCommand = New OleDbCommand(SqlString, oleDbConn)
cmd.CommandType = CommandType.Text
cmd.Parameters.AddWithValue("#f1", ArticleTitle.Text)
cmd.Parameters.AddWithValue("#f2", CategoryDropDown.SelectedValue)
cmd.Parameters.AddWithValue("#f3", User.Identity.Name)
cmd.Parameters.AddWithValue("#f4", DateTime.Now.Date)
cmd.Parameters.AddWithValue("#f5", HTMLEncode)
oleDbConn.Open()
cmd.ExecuteNonQuery()
TextBox1.Text = Nothing
ArticleTitle.Text = Nothing
CategoryDropDown.ClearSelection()
End If
End Sub

Answer 1

From the looks of it, decodedHTML is just a string which you are creating in the code. This is not accessible through your .aspx page.
You should just be able to update your .aspx markup to;
<%#Server.HtmlDecode(Container.DataItem("[COLUMN_NAME"))%>
Where [COLUMN_NAME] is the actual Table Column which holds the encoded html value.