Extended controls may not be registered before Pre-Render

hi all,

i get the following error message when trying to load a usercontrol containing a modalpopupextender:
"extended controls may not be registered before pre-render"

no line specified, no more info about what's wrong, and almost everything is done with click 'n' drag in design mode (vwd 2005).

default.aspx and its codebehind:http://www.aspsidan.se/code/default.asp?c=9359

editcontent.ascx and its codebehind:http://www.aspsidan.se/code/default.asp?c=9361

the error message:http://www.aspsidan.se/code/default.asp?c=9360

editcontent.ascx is, as you can see, within a loginview, and it's not until i log on that i get the problem. i guess this error has something to do with the page life cycle, but i have no clue of how to get around it...

(i posted the code already in another forum, so i refer to those pages. i hope they're available even if you're not logged on. i've tried when i was offline and it worked, so it shouldn't be a problem...)

Hi lycken,

It is a common issue. You should add base.OnPreRender at the beginning ofvoid OnPreRender(EventArgs e){};

For more , pleaseread this. If it doesn't work, please feel free to let me know.

Best regards,

Jonathan

hi jonathan,

thanks a lot for the reply! it really does save my day that there is a solution to this.

however, neither your answer nor the article you linked me to helped me all the way. i understand i have to call the base.OnPreRender routine, but i can't figure out where in my code to put the call. i am coding in vb, so if you could explain it with vb examples instead of c# it would help me ;)

thanks again for your help!

-tomas

Hi Lycken,

Would you please give us a tiny and workable repro? So you can benefit from it directly. Thanks for your understanding.

Best regards,

Jonathan

hi again jonathan,

i provided all my source code in the first post - unless the links are not working. it's pasted below anyway - excuse the lenghtyness... and again - thanks for helping out!

the db is designed as follows:

Texts
******
TextID | int (identifier, primary key)
TextName | varchar(15)
Text | varchar(max)

Default.aspx

1<%@. Page Language="VB" MasterPageFile="~/site.master" AutoEventWireup="false" CodeFile="Default.aspx.vb"Inherits="_Default" title="Untitled Page" Theme="SMK" Trace="true" %>
2<%@. RegisterAssembly="AjaxControlToolkit"Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
3<%@. Register TagPrefix="list" TagName="Concerts" src="~/konsertprogram/Concerts.ascx" %>
4<%@. Register TagPrefix="ucl" TagName="EditContent" src="~/admin/EditContent.ascx" %>
5
6<asp:Content ID="Content1" ContentPlaceHolderID="Left" Runat="Server">
7 <asp:Image ID="LeftPaneImage" runat="server" ImageUrl="~/image/bredvid_konserter.jpg" />
8</asp:Content>
9<asp:Content ID="Content2" ContentPlaceHolderID="Content" Runat="Server">
10 <asp:Label ID="TextLabel" runat="server" />
11 <div style="text-align:right; width:100%;">
12 <asp:LoginView ID="LoginView1" runat="server">
13 <RoleGroups>
14 <asp:RoleGroup Roles="Admin">
15 <ContentTemplate>
16 <ucl:EditContent ID="EditContentUserControl" runat="server" TextToEdit="hem" />
17 </ContentTemplate>
18 </asp:RoleGroup>
19 </RoleGroups>
20 </asp:LoginView>
21 </div>
22
23 <div class="row">
24 <div style="float:left;">
25 <h1>N?sta konsert:</h1>
26 <list:Concerts ID="Concerts" runat="server" ItemsToShow="1" />
27 </div>
28
29 <div style="float:left;">
30 <h1>En till ruta</h1>
31 <p>med lite info</p>
32 </div>
33 </div>
34
35</asp:Content>

Default.aspx.vb

1Imports System.Configuration
2Imports System.Data.SqlClient
3Imports System.Data.SqlDbType
4Imports ErrorHandling
5
6PartialClass _Default
7Inherits System.Web.UI.Page
8
9Dim objConnAs New SqlConnection(ConfigurationManager.ConnectionStrings("SMK").ConnectionString)
10
11Protected Sub Page_Load(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles Me.Load
12Dim objCmdAs New SqlCommand("SELECT [Text] FROM [Texts] WHERE [TextName] ='hem'", objConn)
13
14Try
15 objConn.Open()
16 TextLabel.Text = StringFunctions.FormatText(objCmd.ExecuteScalar)
17Catch exAs Exception
18 Err.Log(ex)
19Finally
20 If objConn IsNotNothing Then objConn.Close()
21End Try
22 End Sub
23End Class

EditContent.ascx

1<%@. Control Language="VB" AutoEventWireup="false" CodeFile="EditContent.ascx.vb"Inherits="admin_EditContent" %>
2<%@. RegisterAssembly="AjaxControlToolkit"Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
3<asp:ScriptManager ID="ScriptManager1" runat="server">
4</asp:ScriptManager>
5<asp:LinkButton ID="EditText" runat="server" CssClass="textr">Redigera texten</asp:LinkButton>
6<asp:Panel ID="ModalPanel" runat="server" CssClass="modalpu">
7 <asp:Button ID="btnBold" runat="server" Font-Bold="True" Text="F" Width="30px" />
8 <asp:Button ID="btnItalic" runat="server" Font-Italic="True" Text="K" Width="30px" />
9 <asp:Button ID="btnUnderline" runat="server" Font-Underline="True" Text="U" Width="30px" />
10 <asp:Button ID="btnHeader" runat="server" Text="Rubrik" Width="80px" />
11 <asp:Button ID="btnText" runat="server" Text="Text" Width="80px" /><br />
12 <asp:TextBox ID="tbContent" runat="server" Height="400px" Width="430px" TextMode="MultiLine" /><br />
13 <asp:Button ID="OKButton" runat="server" Font-Bold="True" Text="Skicka" Width="90px" />
14 <asp:Button ID="CancelButton" runat="server" Text="Avbryt" Width="90px" /><br />
15 <asp:Label ID="lblStatus" runat="server" />
16</asp:Panel>
17<cc1:ModalPopupExtender ID="ModalPopupExtender" runat="server"
18 TargetControlID="EditText"
19 PopupControlID="ModalPanel"
20 x="0"
21 Y="0"
22 DropShadow="true"
23 RepositionMode="none"
24 OkControlID="OKButton"
25 OnOkScript="__doPostBack('ctl00$Content$LoginView1$EditContentUserControl$OKButton','')"
26 CancelControlID="CancelButton"
27 BackgroundCssClass="modalbg" />

EditContent.ascx.vb
1Imports System.Configuration
2Imports System.Data.SqlClient
3Imports System.Data.SqlDbType
4Imports ErrorHandling
5
6PartialClass admin_EditContent
7Inherits System.Web.UI.UserControl
8
9Dim objConnAs New SqlConnection(ConfigurationManager.ConnectionStrings("SMK").ConnectionString)
10Private _textToEditAs String
11
12 Public WriteOnly Property TextToEdit()As String
13 Set(ByVal valueAs String)
14 _textToEdit = value
15End Set
16 End Property
17
18 Protected Sub Page_Load(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles Me.Load
19Dim objCmdAs New SqlCommand("SELECT [Text] FROM [Texts] WHERE [TextName] = @.TextName", objConn)
20
21Dim objParamAs New SqlParameter("@.TextName", VarChar)
22 objParam.Value = _textToEdit
23 objCmd.Parameters.Add(objParam)
24
25Try
26 objConn.Open()
27 tbContent.Text = objCmd.ExecuteScalar
28Catch exAs Exception
29 Err.Log(ex)
30Finally
31 If objConn IsNotNothing Then objConn.Close()
32End Try
33 End Sub
34
35 Protected Sub OKButton_Click(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles OKButton.Click
36Dim objCmdAs New SqlCommand("UPDATE Texts SET [Text] = @.Text WHERE [TextName] = @.TextName", objConn)
37
38Dim objParamAs New SqlParameter("@.Text", VarChar)
39 objParam.Value = tbContent.Text
40 objCmd.Parameters.Add(objParam)
41
42 objParam =New SqlParameter("@.TextName", VarChar)
43 objParam.Value = _textToEdit
44 objCmd.Parameters.Add(objParam)
45
46Try
47 objConn.Open()
48 objCmd.ExecuteNonQuery()
49 lblStatus.Text ="Uppdaterat!"
50Catch exAs Exception
51 Err.Log(ex)
52Finally
53 If objConn IsNotNothing Then objConn.Close()
54End Try
55
56 objConn =Nothing
57 objCmd =Nothing
58 End Sub
59End Class
  

Hi Luken,

Would you please add this code to EditContent.ascx.vb?

protected override void OnPreRender(EventArgs e)
{
// add base.OnPreRender(e); at the beginning of the method.
base.OnPreRender(e);

// codes to handle with your controls.
...
}

I have copied your code to my project and did some modifications(comment and rename work only) , it works well on my machine. Also where's your master page? If it doesn't work, would you please create aworkable sample and give us the links so that we can download your project. Thanks

Best regards,

Jonathan

i'd love to add it to editcontent.ascx.vb, but i don't know how to re-write it to vb. i get syntax errors on "base" when i try. what is it called with vb syntax?

Hi Lycken,

For example,

C# code

protected override void OnPreRender(EventArgs e)
{
// add base.OnPreRender(e); at the beginning of the method.
base.OnPreRender(e);

// codes to handle with your controls.
...
}

Convert to VB Code,

Protected Overloads Overrides Sub OnPreRender(ByVal e As EventArgs) ' add base.OnPreRender(e); at the beginning of the method. MyBase.OnPreRender(e) ' codes to handle with your controls.

End Sub

Here is anuseful tool.

I hope this help.

Best regards,

Jonathan

thanks a lot! it's working fine now - or at least this part of the solution is... i have a couple of other things that aren't doing so well at the moment, but i'll work on those for yet a while before i post here.

again, thanks!

Exporting gridview to excel and Ajax page get an error

hello I trying to export a gridview to excel in my project, but I got this error:

"Sys.WebForms.PageRequestManagerParserErrorException:The message received from the server could not be parsed. Common causesfor this error are when the response is modified by calls toResponse.Write(), response filters, HttpModules, or server trace isenabled."

is there a way to export this without response.write or to solve this issue with ajax

I solve the problem like this:

protectedvoid Page_Init()

{

PostBackTrigger trigger =newPostBackTrigger();

trigger.ControlID = ((Button)pnGridViewProcess.FindControl("btnExcel")).UniqueID.ToString();

((System.Web.UI.UpdatePanel)Page.Controls[0].FindControl("UpdatePanel1")).Triggers.Add(trigger);

}

Exception Error with Ajax - Remove Alert

I want to show the Exception Error in the browser, when use AJAX the error open a alert message...

Thank's

Antonio Dornellas

Hi Antonio,

Please refer tothis for how to customize the error message, inUsing Client Script to Customize Error Handling section.

Hope this helps.

errow message in autocomplete exstention

Just install the toolkit getting this err

"AjaxControlToolkit.AutoCompleteExtender missing required ServiceMethod property value for AutoCompleteExtender1.
Parameter name: ServiceMethod"

What coud be the problem ??

You are missing the WebService that is used in the AutoCompleteExtender. The default AutoCompleteExtender takes GetCompletionList as service method in AutoComplete.asmx. Check you have that file

Thanks

i downlodede the exstention - zip file, where is the web servise ?

If you have downloaded only the extension, then you need to provide the WebSerivce methods.

If you have download the AjaxToolkit, then the web service comes along with that. The source for toolkit is herehttp://www.codeplex.com/Release/ProjectReleases.aspx?ProjectName=AtlasControlToolkit

Thanks

DEar Frind

I download it from the same place , install the template created my tab at vs 2005 adn chose the dll from the bin file at the websample ?

What more need i do ?

Post the code you have written for the autocomplete extender

Thanks

hey

The code of the autocomplete

<cc1:AutoCompleteExtenderID="AutoCompleteExtender1"runat="server"TargetControlID="TextBox1"></cc1:AutoCompleteExtender>

- getting exception in the begining of the page loading.

Thank u

If that is your code, then its correct you are getting the error. AutoCompleteExtender needs servicepath and service method from where it can pick the values for the list. Did you see the sample at http://ajax.asp.net/ajaxtoolkit/AutoComplete/AutoComplete.aspx and how it was implemented? Check the autocomplete properties in the link given, and if you open the AutoComplete folder in the SampleWebSite you downloaded, you will see the complete code on how it was implemented.

Thanks

Saw it Ofcourse but canot find the asmx file ?

copy the servise path as wriiten, getting err that canot find the asmx file.

Thnak its works - wrote the hole path.

ScriptPath

="AutoComplete.asmx"TargetControlID="TextBox1"CompletionInterval="12"ServiceMethod="GetCompletionList"

working - thank u

If you have downloaded the AjaxControlToolkit properly the asmx file is in

AjaxControlToolkit\SampleWebSite\AutoComplete\AutoComplete.asmx and the corresponding .cs file in the App_Code.

Thanks

Errors with Update Panel

Hi,

I am using an update panel for a seamless change when someone changes something on the page. However, I get an error message the second time I change something. The first time i used the update panel was to chan ge the contents of one dropdown list after another list was changed, it would work once but as soon as you change it again in that same session it would error out. I am now trying it again with a checkbox and the ToggleButtonExtender so that images toggle back and forth and I am getting the same error again. Here are the details:

Event Viweer - Application warnings:

Event code: 3009

Event message: Unable to make the session state request to the session state server. Details: last phase='Sending request to the state server', error code=0x80072749, size of outgoing data=0

Event time: 7/21/2007 11:15:09 AM

Event time (UTC): 7/21/2007 5:15:09 PM

Event ID: 9010d9cb58c2471b99f8c0988127eaf5

Event sequence: 181

Event occurrence: 1

Event detail code: 50016

Application information:

Application domain: 7fb7c3c2-1-128295113834687500

Trust level: Full

Application Virtual Path: /AjaxControlToolkitWebSite2

Application Path: D:\WebProjects\AjaxControlToolkitWebSite2\

Machine name: SATURN-V

Process information:

Process ID: 4652

Process name: WebDev.WebServer.EXE

Account name: LAUNCHZONE\CurtisL

Exception information:

Exception type: HttpException

Exception message: Unable to make the session state request to the session state server. Please ensure that the ASP.NET State service is started and that the client and server ports are the same. If the server is on a remote machine, please ensure that it accepts remote requests by checking the value of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\AllowRemoteConnection. If the server is on the local machine, and if the before mentioned registry value does not exist or is set to 0, then the state server connection string must use either 'localhost' or '127.0.0.1' as the server name.

Request information:

Request URL: http://localhost:2536/AjaxControlToolkitWebSite2/images/minus.gif

Request path: /AjaxControlToolkitWebSite2/images/minus.gif

User host address: 127.0.0.1

User: LAUNCHZONE\CurtisL

Is authenticated: True

Authentication Type: NTLM

Thread account name: LAUNCHZONE\CurtisL

Thread information:

Thread ID: 4

Thread account name: LAUNCHZONE\CurtisL

Is impersonating: False

Stack trace:

Custom event details:

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Error on page:

Sys, WebForms.PageRequestManagerServerErrorException: an unknow error occured while processing the request on the server. the status code returned from the server was: 500

My Code:

<%@dotnet.itags.org.PageLanguage="VB"AutoEventWireup="true"CodeFile="Default.aspx.vb"Inherits="_Default" %>

<!DOCTYPEhtmlPUBLIC"-//W3C//DTD XHTML 1.1//EN""http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<htmlxmlns="http://www.w3.org/1999/xhtml">

<headrunat="server">

<title>Untitled Page</title>

</head>

<body>

<formid="form1"runat="server">

<asp:ScriptManagerID="ScriptManager1"runat="server"/>

<div>

<asp:UpdatePanelID="UpdatePanel1"runat="server">

<ContentTemplate>

<asp:TextBoxID="TextBox1"runat="server"></asp:TextBox><asp:CheckBoxID="CheckBox1"runat="server"AutoPostBack="True"/><ajaxToolkit:ToggleButtonExtenderID="ToggleCheckbox"CheckedImageUrl="images/plus.gif"ImageHeight="9"ImageWidth="9"TargetControlID="CheckBox1"UncheckedImageUrl="images/minus.gif"runat="server">

</ajaxToolkit:ToggleButtonExtender>

</ContentTemplate>

</asp:UpdatePanel>

<br/>

<br/>

<br/>

<br/>

</div>

</form>

</body>

</html>

Code Behind:

PartialClass _Default

Inherits System.Web.UI.Page

ProtectedSub CheckBox1_CheckedChanged(ByVal senderAsObject,ByVal eAs System.EventArgs)Handles CheckBox1.CheckedChanged

Dim strValueAsString =""

If CheckBox1.Checked =TrueThen

TextBox1.Text ="in"

Else

TextBox1.Text ="out"

EndIf

EndSub

EndClass

I have had this error more than once now and I'm not sure how to fix it. When I remove the update panel everything works fine, any ideas?

It seems you are uaing different setting for Session other than "InProc". Pls make sure you have configured it properly.

Thanks, I think that helped.