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Using datatables for datasource

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Rotator
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Mac
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Mac asked on 11 Sep 2008, 04:34 PM
Hi
I'm trying to extract information from a dbase into the rotator. This is the code i have so far:

Imports System
Imports System.Data
Imports System.Data.OleDb
Imports System.Drawing
Imports Telerik.Web.UI
Imports System.Collections.Generic
Partial Class fullview
    Inherits System.Web.UI.Page
    Private Structure fileInfo
        Public Url As String
        Public Image As String
          End Structure

    Private Property imagesArray() As List(Of fileInfo)
        Get
            Return DirectCast(ViewState("imagesArray"), List(Of fileInfo))
        End Get
        Set(ByVal value As List(Of fileInfo))
            ViewState("imagesArray") = value
        End Set
    End Property
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim rotatorData As New DataTable()
        rotatorData.Columns.Add("URL")
        rotatorData.Columns.Add("Image")
        Dim conn As Data.SqlClient.SqlConnection
        Dim cmd As Data.SqlClient.SqlCommand
        Dim reader As Data.SqlClient.SqlDataReader
        conn = New Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings.Item(1).ToString)

        Dim gal, photo, urli As String
        urli = Request.QueryString("galleryName")
        'temp = urli.Substring(urli.IndexOf("=") + 1, (urli.IndexOf("&")) - (urli.IndexOf("=") + 1))
        gal = urli.Replace("%20", " ")
        urli = Request.QueryString("photo")
        photo = urli.Replace("%20", " ")
        Response.Write(urli & gal & photo)
        conn.Open()
        cmd = New Data.SqlClient.SqlCommand("select * from Gallery where GalleryName='" & gal & "' and UserID=" & Session("uid"), conn)
        imagesArray = New List(Of fileInfo)()

        reader = cmd.ExecuteReader

        If (reader.HasRows) Then

            While (reader.Read())

                Dim fInfo As New fileInfo()
                fInfo.Url = "<a href=" & Chr(34) & "javascript:ajaxpage('fullview.aspx?galleryname=" & gal & "&photo=" & Trim(reader("PictureURL").ToString) & "','contentarea')" & Chr(34) & ">"
                fInfo.Image = "'images/users/" & Session("uid") & "/" & gal & "/Thumbnails/" & Trim(reader("PictureURL").ToString) & "'"

                imagesArray.Add(fInfo)
            End While
      
        End If
        RebindRotator()

    End Sub
    Private Sub RebindRotator()
        Dim rotatorData As New DataTable()
        rotatorData.Columns.Add("Url")
        rotatorData.Columns.Add("Image")
        For Each tempInfo As fileInfo In imagesArray
            rotatorData.Rows.Add(New String() {tempInfo.Url, tempInfo.Image})
        Next

        RadRotator1.DataSource = rotatorData()
        RadRotator1.DataBind()
    End Sub

End Class

and the aspx:

 <telerik:RadScriptManager ID="RadScriptManager1" runat="server"
        OutputCompression="AutoDetect">
    </telerik:RadScriptManager>
  
        <telerik:RadRotator ID="RadRotator1" runat="server">
         <ItemTemplate>
      <a href="<%# DataBinder.Eval(Container.DataItem, "URL") %>"><img src="<%# DataBinder.Eval(Container.DataItem, "Image") %>"</a>
   </ItemTemplate>
        </telerik:RadRotator>
        <br />

The error i get is:

Server Error in '/profiles' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC30367: Class 'System.Data.DataTable' cannot be indexed because it has no default property.

Source Error:


Line 65:         Next
Line 66:
Line 67: RadRotator1.DataSource = rotatorData()
Line 68: RadRotator1.DataBind()
Line 69: End Sub

I was hoping that since i gleaned this tactic from one of your examples, you might be able to help me with that, since i'm not having much luck on the net.
Thanks in advance.

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Georgi Tunev
Telerik team
answered on 15 Sep 2008, 09:13 AM
Hi Mac,

Without being able to examine your project locally, I cannot be of much help, but looking at your code, I notice that  in the table, the name of the column is "Url", while in the rotator's template you are using "URL" - this might be the reason for the problem.

If you still experience difficulties with this scenario, please open a support ticket and send us a small sample project where it can be reproduced - we will check it and do our best to help. Just make sure that the project can be run locally and attach it to the support thread.


Sincerely yours,
Georgi Tunev
the Telerik team

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