RadGrid with Dynamically added LinkButtons loosing buttons on filter.

2 posts, 0 answers
  1. Debbie
    Debbie avatar
    1 posts
    Member since:
    Jul 2009

    Posted 01 Jun 2016 Link to this post

    Here is my Original Post, I had originally created a new account because I didn't realize that our team had access to an account with priority support. I apologize for the double post, but I have a feeling that this one will get noticed sooner.

    Here is the text from the original post


    My customer has requested that we put link buttons into a specific field on a grid. The nature of the filed being that I need to have regular text followed by an unlimited number links means that I have to add my buttons dynamically. I have the text followed by links working proper upon the initial page load but something happens after the grid filter is applied. Once the grid filter is applied a post back occurs my method is still called to reformat the filed into it's final format however. Once the page loads the links are nowhere to be found and the grid cells display the text that is being converted into the buttons. Currently I am calling my logic to create the grid links on page load. I have to create the grid links in load because if I do it any later than that then my link buttons no longer function properly. Some help would be greatly appreciated. Thanks in advance below are some of my code snippets.

    Private Sub RadGridResults_Load(sender As Object, e As EventArgs) Handles RadGridResults.Load
         For Each Item As GridItem In RadGridResults.MasterTableView.Items
    End Sub

    Private Sub CreateGridLinks(item As GridItem)
        If TypeOf item Is Telerik.Web.UI.GridDataItem Then
            Dim dataItem As Telerik.Web.UI.GridDataItem = CType(item, Telerik.Web.UI.GridDataItem)
            For Each cell As TableCell In item.Cells
                Dim Issues() As String = cell.Text.Split(";"c)
                If Issues.Length > 1 AndAlso cell.Text <> " " Then
                    Dim CellText As String = Issues(0) + " "
                    Dim CellId As String = ""
                    Dim IssueAppealType As String = ""
                    Dim IssueAppealId As String = ""
                    For i As Integer = 1 To _issues.Length - 1
                        If i = 1 Then
                            cell.Controls.Add(New LiteralControl(CellText))
                        End If
                        If _issues(i).Trim.Split(":"c).Length > 1 Then
                            Dim IssueAppealButton As New LinkButton()
                            CellId = _issues(i).Trim.Replace(":", "")
                            Dim IssueAppealArray = _issues(i).Trim.Split(":"c)
                            IssueAppealType = IssueAppealArray(0)
                            IssueAppealId = IssueAppealArray(1)
                            IssueAppealButton.Text = IssueAppealId
                            cntrlCount += 1
                            IssueAppealButton.ID = "LinkButton" + CellId + cntrlCount.ToString
                            AddHandler IssueAppealButton.Click, Sub(send, evt) HandleIssueLinkClick(IssueAppealId, IssueAppealType)
                            cell.Controls.Add(New LiteralControl(" "))
                        End If
                End If
        End If
    End Sub
  2. Konstantin Dikov
    Konstantin Dikov avatar
    2466 posts

    Posted 03 Jun 2016 Link to this post

    Hi Debbie,

    First, please note that in order to take advantage of the support you need to use the official ticket system.

    However, regarding the issue that you are experiencing. Although that you approach might work initially, once you perform some operation, the Page's Load event will be too early in the page's life cycle for adding controls dynamically, because the grid will rebind after it and will recreate its structure.

    The correct approach should be to create and add the controls in the OnItemCreated event and add the relevant data within the OnItemDataBound event.

    Hope this helps.

    Konstantin Dikov
    Do you need help with upgrading your ASP.NET AJAX, WPF or WinForms projects? Check the Telerik API Analyzer and share your thoughts.
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