How do I transfer listbox Items during processing?

[David]

I am writing some C# code that transfers data from files into a database. I show the files to be processed in one list box and once processed I wish to transfer it from that listbox to another. Unfortunately it doesn't show any of the moves until after all the processing is completed. Can anyone show me what I am doing wrong?

<telerik:RadAjaxPanel ID="RP1" runat="server" Width="100%">

        <br />
        <table class="style2">
            <tr>
                <td align="center" width="33%">
                    <asp:Label ID="lblUpload" runat="server" ForeColor="#000099" Text="Uploaded" Visible="False"></asp:Label>
                </td>
                <td align="center" width="33%">
                     </td>
                <td align="center" width="33%">
                    <asp:Label ID="lblProcessed" runat="server" ForeColor="#000099" Text="Imported" Visible="False"></asp:Label>
                </td>
            </tr>
            <tr>
                <td align="center" valign="top" width="50%">
                    <telerik:RadListBox ID="UploadListBox" runat="server" Visible="False" Width="350px"
                        AllowDelete="True" TransferToID="ProcessedListBox">
                        <ButtonSettings TransferButtons="All"></ButtonSettings>
                    </telerik:RadListBox>
                </td>
                <td align="center" valign="top" width="50%">
                    <telerik:RadButton ID="RadButton1" runat="server" onclick="RadButton1_Click"
                        Text="Transfer to Database">
                    </telerik:RadButton>
                </td>
                <td align="center" valign="top" width="50%">
                    <telerik:RadListBox ID="ProcessedListBox" runat="server" Visible="False" Width="350px">
                        <ButtonSettings TransferButtons="All"></ButtonSettings>
                    </telerik:RadListBox>
                </td>
            </tr>
        </table>
        </telerik:RadAjaxPanel>

C#

protected void RadButton1_Click(object sender, EventArgs e)
    {
        {

            int tcount = UploadListBox.Items.Count;
            if (tcount < 1)
            {
                lblMessage.Text= "You must have files to process.";
                return;
            }
            int increment = 100 / tcount;
            int completed = 0;
            string pfile;
            string[] fileparts;
            for (int i = 0; i < (tcount); i++)
            {
                string filetype;
                InitMstrVariables();
                InitFGVariables();
                InitTransactionSet();
                pfile = UploadListBox.Items[0].Value.ToString();
                fileparts = pfile.Split('_');
                MstrType = Right(fileparts[1], 1).ToUpper();
                Batch = Convert.ToInt32(fileparts[0]);
                MstrYearMonth = Convert.ToInt32(Left(fileparts[3], 6));
                DateCreated = StrToDate(fileparts[3]);
                filetype = Left(fileparts[1], 3);
                if (filetype == "834")
                {
                    DeleteBatch834();
                    ProcessFile834(pfile);
                }
                else if (filetype == "820")
                {
                    DeleteBatch820();
                    ProcessFile820(pfile);
                }
                var item = new Telerik.Web.UI.RadListBoxItem();
                item.Value = pfile;
                item.Text = pfile;
                UploadListBox.Transfer(UploadListBox.Items[0], UploadListBox, ProcessedListBox);
                File.Delete(filepath + pfile);
                completed = completed + increment;
            }
        }
    }

This is really bugging me. :)

[Princy]

Hello David,

Take a look at the following demo.
ListBox / Transfer.

Thanks,
Princy.

[David]

Hi,

I forgot I had started an older thread on this. I'm still having a problem though.

http://www.telerik.com/community/forums/aspnet-ajax/listbox/moving-items-from-one-listbox-to-another-during-server-side-event.aspx

[Dimitar Terziev]

Hi David,

I'm closing this thread for now and we will continue the discussion in this one here.

Regards,
Dimitar Terziev
the Telerik team