Trouble with RADAjaxManager

[Alan]

I am trying to use RADAjaxManager but when I run my app and cause a trigger, I get the following error:

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near 'Manager1"));
});
|<div id="__asptrace"'.

The error is occuring in this code:

    function Sys$WebForms$PageRequestManager$_endPostBack(error, response) {
        // DevDiv Bugs 130268: There could have been a 2nd request that started while this one was being
        // processed. Detect this by comparing the request for the current response to the _request field,
        // which stores the latest request that has begun. If they are different, do not clear the state
        // data that will be required by the 2nd request's response.
        if (this._request === response.get_webRequest()) {
            this._processingRequest = false;
            this._additionalInput = null;
            this._request = null;
        }

        var handler = this._get_eventHandlerList().getHandler("endRequest");
        var errorHandled = false;
        if (handler) {
            var eventArgs = new Sys.WebForms.EndRequestEventArgs(error, this._dataItems, response);
            handler(this, eventArgs);
            errorHandled = eventArgs.get_errorHandled();
        }
        // DevDiv Bugs 130268: See above
        if (!this._processingRequest) {
            this._dataItems = null;
        }
        if (error && !errorHandled) {
            // DevDiv 89485: throw, don't alert()
            throw error;
        }
    }

Here is my code:

        <form id="form1" runat="server">
            <telerik:RadScriptManager ID="RadScriptManager1" Runat="server">
            </telerik:RadScriptManager>
            <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server"
                EnableHistory="True">
                <AjaxSettings>
                    <telerik:AjaxSetting AjaxControlID="btnSearch">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="InputAgent" />
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                </AjaxSettings>
            </telerik:RadAjaxManager>

                <asp:FormView
                    ID="InputAgent"
                    Height="250px" Width="926px"
                    DefaultMode="Edit"
                    DataKeyNames="ID,Version"
                    DataSourceID="srcAgent"
                    AllowPaging="true"
                  PagerSettings-Visible="false"
                    OnItemUpdated="frmAgent_ItemUpdated"
                    runat="server" HorizontalAlign="Left"
                    >

I have left out the Template code for the formview control.

What am I doing wrong?

[Iana Tsolova]

Hello Alan,

Could you provide more details about your case. For example what you are doing in code behind?
Any additional information will help us to pinpoint where the error comes from.

Greetings,
Iana
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Alan]

Here is the code behind for the form:

Option Infer On
Imports System.Linq
Imports System.Data.Linq
Imports System.Web.UI.WebControls
Imports System.Web.UI
Imports Telerik.Web.UI
Imports BasePageVB

Partial Class InputAgentForm
    Inherits BasePage

    Public Shared Function GetPostBackControl(ByVal Page As Page) As Control
        Dim ctrl As Control = Nothing

        Dim ctrlName As String = Page.Request.Params.Get("__EVENTTARGET")
        If ctrlName <> "" Then
            ctrl = Page.FindControl(ctrlName)
        Else
            For Each ctl In Page.Request.Form
                Dim c As Control = Page.FindControl(ctl)
                If TypeOf (c) Is Button Then
                    cctrl = c
                    Exit For
                End If
            Next
        End If
        Return ctrl
    End Function

    Private Sub page_Load(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) _
    Handles MyBase.Load, Me.Load

        Dim newCookie As HttpCookie
        Dim SessionID As String

        Try
            If Request.Cookies("RentAPlace")("ServerName") <> "" Then
                SessionID = Request.Cookies("RentAPlace")("SessionID")
            End If
        Catch ex As Exception
            newCookie = New HttpCookie("RentAPlace")
            newCookie.Values.Add("ServerName", "NewDellDeskTop\SQL2000")
            newCookie.Values.Add("DBName", "RentalV3")
            newCookie.Values.Add("SessionID", System.Guid.NewGuid().ToString())
            newCookie.Values.Add("SingleUserQB", "True")
            newCookie.Values.Add("DisabledQB", "True")
            Response.Cookies.Add(newCookie)
        End Try

        If Not Page.IsPostBack Then
            Session("ShowHiddenAgents") = 0
            'Page.DataBind()
            Session("InputAgentPage") = 1
        End If

    End Sub

    Private Sub Search_Click( _
     ByVal sender As System.Object, _
     ByVal e As System.EventArgs) _
     Handles btnSearch.Click

        FindDynamic(0, 0)
    End Sub

    Private Sub SearchNext_Click( _
     ByVal sender As System.Object, _
     ByVal e As System.EventArgs) _
     Handles btnSearchNext.Click

        FindDynamic(InputAgent.PageIndex + 1, 0)
    End Sub

    Private Sub ShowHiddenPB_Click( _
     ByVal sender As System.Object, _
     ByVal e As System.EventArgs) _
     Handles btnShowHidden.Click

        Dim ShowHidden As Integer = Session("ShowHidden")

        'Toggle session value ShowHidden
        If ShowHidden = 1 Then
            Session("ShowHidden") = 0
            'btnShowHidden.Text = "Show Hidden"
        Else
            Session("ShowHidden") = 1
            'btnShowHidden.Text = "Don't" & vbCrLf & "Show Hidden"
        End If

        Dim txt As TextBox = InputAgent.FindControl("tbxID")
        Dim intID As Integer = Convert.ToInt32(txt.Text)

        Session("AgentFindID") = intID
        Session("AgentCurrentIndex") = InputAgent.PageIndex

        Page.DataBind()
        'FindDynamic(Convert.ToInt32(ID.Text), InputAgent.PageIndex + 1)
    End Sub

    Private Sub ShowHiddenPB_PreRend( _
     ByVal sender As System.Object, _
     ByVal e As System.EventArgs) _
     Handles btnShowHidden.PreRender

        'Make the button text agree with the Show Hidden session value
        Dim ShowHidden As Integer = Session("ShowHidden")

        'Toggle session value ShowHidden
        If ShowHidden = 0 Then
            btnShowHidden.Text = "Show Hidden"
        Else
            btnShowHidden.Text = "Don't" & vbCrLf & "Show Hidden"
        End If

        Dim c As Control = GetPostBackControl(Me.Page)
        If Not c Is Nothing Then
            If c.ID = "btnShowHidden" Then
                Dim intCurrentID = Session("AgentFindID")
                FindDynamic(0, intCurrentID)
            End If
        End If
    End Sub

    Sub FindDynamic( _
    ByVal intStartIndex As Integer, _
    ByVal intID As Integer _
    )

        Dim db As New RentalDBDataContext()
        Dim ShowHidden As Integer = Session("ShowHidden")

        Dim query = db.spFindAgent(intID, ShowHidden, intStartIndex, cmbFirstNameSelect.Text, cmbLastNameSelect.Text, "", "", "", "")

        For Each z In query
            InputAgent.PageIndex = z.RowNumber - 1
            Exit For
        Next
    End Sub

    'Protected Sub srcAgent_Inserting(ByVal sender As Object, ByVal e As ObjectDataSourceStatusEventArgs)
    '   If e.Exception Is Nothing Then
    '       'InputAgent.ChangeMode(FormViewMode.Edit)
    '   End If
    'End Sub

    'Protected Sub srcAgent_Inserted(ByVal sender As Object, ByVal e As ObjectDataSourceStatusEventArgs)
    '   If e.Exception Is Nothing Then
    '       Dim tbx As TextBox = InputAgent.FindControl("tbxID")
    '       Dim lngID As Long = CType(tbx.Text, Long)
    '       InputAgent.ChangeMode(FormViewMode.Edit)
    '       Dim NewAgent As tblAgent = CType(e.ReturnValue, tblAgent)
    '       Session("AgentFindID") = lngID
    '       FindDynamic(0, lngID)
    '   End If
    'End Sub

    Protected Sub srcAgent_Updating(ByVal sender As Object, ByVal e As ObjectDataSourceMethodEventArgs)
        Dim NewAgent As tblAgent = CType(e.InputParameters(1), tblAgent)
        'If NewAgent.Id = 0 Then
        '   NewAgent.AuthorUserName = User.Identity.Name
        '   NewAgent.ViewCount = 0
        'End If
    End Sub

    Protected Sub srcAgent_Updated(ByVal sender As Object, ByVal e As ObjectDataSourceStatusEventArgs)
        If e.Exception Is Nothing Then
            Dim NewAgent As tblAgent = CType(e.ReturnValue, tblAgent)
            'Response.Redirect("~/Authenticated/CodeSamples/Default.aspx?entryId=" & NewAgent.ID)
        End If
    End Sub

    Protected Sub frmAgent_ItemUpdated(ByVal sender As Object, ByVal e As FormViewUpdatedEventArgs)
        If Not e.Exception Is Nothing Then
            e.KeepInEditMode = True
            e.ExceptionHandled = True
            ValidationUtility.ShowValidationErrors(Me, e.Exception)
        End If
    End Sub

    Protected Sub frmAgent_ItemInserted(ByVal sender As Object, ByVal e As FormViewInsertedEventArgs)
        If Not e.Exception Is Nothing Then
            e.KeepInInsertMode = True
            e.ExceptionHandled = True
            ValidationUtility.ShowValidationErrors(Me, e.Exception)
        End If
    End Sub

    Protected Sub InputAgent_DataBound _
     (ByVal sender As Object, ByVal e As System.EventArgs) _
     Handles InputAgent.DataBound

        Dim tbx As TextBox = InputAgent.FindControl("tbxID")
        If tbx Is Nothing Then
            Exit Sub
        ElseIf tbx.Text <> "" Then
            Exit Sub
        End If

        tbx.Text = "0"
        Dim cbx As Checkbox = InputAgent.FindControl("cbxMarkedForUpdate")
        cbx.Checked = False

        tbx = InputAgent.FindControl("tbxPctOfCommission")
        tbx.Text = "50"

        tbx = InputAgent.FindControl("tbxCountry")
        tbx.Text = "US"

        tbx = InputAgent.FindControl("tbxtblName")
        tbx.Text = "tblAgent"

        Dim cmb As RadComboBox = InputAgent.FindControl("cmbState")
        cmb.Text = "MA"

        cbx = InputAgent.FindControl("cbxHidden")
        cbx.Checked = False

    End Sub

End Class

Also, I am using using a Linq class derived from a custom base class.  If you need this as well, I can include text or send the files.  Let me know.

[Iana Tsolova]

Hi Alan,

I still can't see anything disturbing in your code that can cause that error. Could you please tell us what other controls do you have on your page? Does the error appear as frequently as the trial license message is showing on the page?

Regards,
Iana
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Alan]

I fixed the problem.  The solution was right there in the error message, but since I'm new to this type of programming, it didn't hit me at first.  Apparently, RadScriptManager doesn't work with trace enabled. I had that directive in my page declaration and when I removed it, things worked like a charm.  Thanks for your help.

[Alan]

How do I mark a reply as the answer?

[Cesar]

I've the same error, but my trace is disabled and I don't know what I can do to resolve it.
The problem occurs when I try close a RadWindow sending a parameter and calling the ClientCallBackFunction function.

Tks,

Cesar Vilarim

[Vlad]

Hi Cesar,

Can you post an example where we can reproduce this?

Kind regards,
Vlad
the Telerik team

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[Cesar]

I encapsulate the RadWindow control in a customized webcontrol called RadLov (List of Values) - RadLov.cs.
This control will be opened and will receive a page with a GridView or a RadGrid control to show a list of values for selection (Grid.aspx).
When I select an item, occasionally that message appears.


RadLov.cs

#region Usings

using System;

using System.Web.UI;

using System.Web.UI.WebControls;

using Telerik.Web.UI;

using System.Text;

using System.Collections.Generic;

#endregion

namespace Stefanini.Web.WebControls

{

/// <summary>

///

/// </summary>

[ToolboxData("<{0}:RadLov runat=server></{0}:RadLov>")]

public class RadLov : WebControl

{

private RadWindowManager radWManager;

private RadWindow Janela;

public event EventHandler<LovItemSelectedEvent> Selecionou;

#region Properties

public string ControleStart { get; set; }

public string ControleOrigemTexto { get; set; }

public string ControleRetorno { get; set; }

public string Classe { get; set; }

public string Titulo { get; set; }

#endregion

#region Eventos

protected override void OnInit(EventArgs e)

{

CriarComponentes();

base.OnInit(e);

}

#endregion

#region Métodos

private void CriarComponentes()

{

this.CssClass = "modalPopup";

radWManager = new RadWindowManager();

Janela = new RadWindow();

Janela.Behaviors = WindowBehaviors.Close;

Janela.Skin = "Vista";

Janela.Width = Unit.Pixel(500);

Janela.Height = Unit.Pixel(500);

Janela.ClientCallBackFunction = "CallBackFunction";

if (!string.IsNullOrEmpty(ControleOrigemTexto))

{

Janela.OffsetElementID = "Area";

}

Janela.Modal = true;

Janela.NavigateUrl = "Grid.aspx";

if (!string.IsNullOrEmpty(Titulo))

{

Janela.Title = Titulo;

Janela.VisibleTitlebar = true;

}

else

{

Janela.VisibleTitlebar = false;

}

radWManager.Windows.Add(Janela);

if (!string.IsNullOrEmpty(ControleStart))

{

radWManager.Windows[0].OpenerElementID = ControleStart;

}

Controls.Add(radWManager);

StringBuilder sb = new StringBuilder();

sb.Append("function CallBackFunction(radWindow, returnValue){");

sb.Append("var oArea = document.getElementById('" + ControleRetorno + "');");

sb.Append("if (returnValue) oArea.value = returnValue;");

sb.Append("else alert ('Nenhum texto retornado.');__doPostBack('" + ControleRetorno + "', returnValue);}");

if (!Page.ClientScript.IsClientScriptBlockRegistered("startRad"))

{

Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "startRad", sb.ToString(), true);

}

}

public void Selecionar(List<LovItem> lovs)

{

LovItemSelectedEvent evento = new LovItemSelectedEvent(lovs, "Classe");

try

{

if (Selecionou != null)

{

Selecionou(this, evento);

}

}

catch (Exception err)

{

throw new Exception(err.ToString());

}

}

#endregion

}

public class LovItemSelectedEvent : EventArgs

{

private List<LovItem> _lista;

public List<LovItem> Lista

{

get { return _lista; }

set { _lista = value; }

}

private string _classInstanciated;

public string ClassInstanciated

{

get { return _classInstanciated; }

}

public LovItemSelectedEvent(List<LovItem> lista, string classInstanciated)

{

_lista = lista;

_classInstanciated = classInstanciated;

}

}

}

Grid.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Grid.aspx.cs" Inherits="Grid" Trace="false" %>

<%@ Register Assembly="Telerik.Web.UI, Version=2008.1.515.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4"
    Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">

    <script type="text/javascript">
    function GetRadWindow()
    {
       var oWindow = null;
       if (window.radWindow) oWindow = window.radWindow;
       else if (window.frameElement.radWindow) oWindow = window.frameElement.radWindow;
       return oWindow;
    }
    function CloseWindow()
    {
       GetRadWindow().Close();
    }
    function OK_Clicked(retorno)
    {
        var oWindow = GetRadWindow();
        oWindow.Close(retorno);
    }

    </script>

    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <div>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:FNACReloadConnectionString %>"
            SelectCommand="SELECT [idArtista], [nmArtista], [nmSobrenome] FROM [TWCR_ARTISTA]">
        </asp:SqlDataSource>


        <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
        </telerik:RadAjaxManager>


        <asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="true">
        <ContentTemplate>
            <asp:GridView ID="GridView1" runat="server" AllowPaging="True"
                    AllowSorting="True" Width="100%"
                    AutoGenerateColumns="False" DataKeyNames="idArtista, nmArtista, nmSobrenome" DataSourceID="SqlDataSource1"
                    onrowcommand="GridView1_RowCommand">
            <Columns>
                <asp:BoundField DataField="idArtista" HeaderText="idArtista" InsertVisible="False"
                    ReadOnly="True" SortExpression="idArtista" />
                <asp:ButtonField DataTextField="nmArtista" HeaderText="nmArtista" SortExpression="nmArtista" />
                <asp:BoundField DataField="nmSobrenome" HeaderText="nmSobrenome" SortExpression="nmSobrenome" />
            </Columns>
        </asp:GridView>
        </ContentTemplate>
        </asp:UpdatePanel>


    </div>
    <input id="Hidden1" type="hidden" runat="server" name="Hidden1" />
    </form>
</body>
</html>

Grid.aspx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class Grid : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == string.Empty)
        {
            int index = Convert.ToInt32(e.CommandArgument);
            string codigo = Convert.ToString(GridView1.DataKeys[index].Values[0]);
            string nome = Convert.ToString(GridView1.DataKeys[index].Values[1]) + " " + Convert.ToString(GridView1.DataKeys[index].Values[2]);
            string fds = codigo + ";" + nome;
            RadAjaxManager1.ResponseScripts.Add("OK_Clicked('" + fds + "');");
        }
    }
}

Tks,

Cesar Vilarim

[Iana Tsolova]

Hi Cesar,

Thank you posting a sample code.

Could you please give us some additional information to help us solve your problem:
    Are you using the trial or the dev version of RadControls for ASP.NET AJAX? 
    Does the message appear as frequent as the controls licence message?
    When you receive the message, please check if the error is near "Telerik.Web.UI 2008...".

If you are using trial version, this message will stop disturbing you after purchasing a developer version.

Let us know if this helps.

Kind regards,
Iana
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Nicolaï]

Hello.

I had the exact same error after upgrading to the latest version (to fix another bug)...

For me, it was an updatepanel with async trigger... It's not the first time: whenever I use the "standard" updatepanels with telerik, it causes bugs and errors.
Removing the "standard" asp:updatepanel removed all errors..
Sometimes it displays the client side name of the updatepanel as text on the page around the controls.
This time it was causing the error:
"
Sys.webforms.pagerequestmanagerparsererrorexception
[....]
Error parsing near ' <!DOCTYPE html P'
"

Best regards,
Nicolai
(ps: seen same error with previous versions too)

[Iana Tsolova]

Hello Nicolai,

I would suggest you to use only one approach, MS UpdatePanel or RadAjaxManager, at a time for updating particular content. Otherwise the UpdatePanels created by the RadAjaxManager and the MS UpdatePanel may interweave and result with unexpected behavior and errors.

Regards,
Iana
the Telerik team

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