I have a web page with the reorderlist web control containing a link button
in the item template.  The result of the click is dependent upon a radio
button selection made prior to the link button click.  The user can update a
text field depending upon the value of the link button, or I would like to
open a different aspx page in a new window (Code Behind of Link button event
attached). I have no problems updating the literal field, and only the
literal field is refreshed.  But when I try to open a new window I get the
following script error on the page:
"Sys.WebForms.pagerequestmanagerParserErrorException:  The message received
from the server could not be parsed."
If I do not use an update panel, the code works fine.  Or if I add a
triggers section to the update panel the code will also work, but I loose
the partial refresh when I update the text field (entire page refreshes).
This is my first attempt at an Ajax enabled web page.  I assume proper
javascript will work better than my code below.  Can someone give me some
hints how to capture the click in javascript so that I can run the code?



Page Source
<asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager><asp:UpdatePanel ID="UpdatePanel2"
runat="server">
                        <ContentTemplate>

            <asp:DropDownList ID="PanelDDl" runat="server" Height="41px"
Width="202px"
                            AutoPostBack="True" DataSourceID="PanelDS"
DataTextField="PanelFullName"
                            DataValueField="OldPanelShortName">
            </asp:DropDownList>
        <cc1:DropDownExtender ID="PanelDDl_DropDownExtender" runat="server"
                                 DynamicServicePath="" Enabled="True"
                                TargetControlID="PanelDDl" >
                            </cc1:DropDownExtender>
   <cc1:ReorderList ID="ReorderList1" runat="server"
                             PostBackOnReorder="False" Width="196px"
DataSourceID="PanelListds"
                             DataKeyField="Counter" >
                             <ItemTemplate>
                                 <asp:LinkButton ID="LinkButton1"
runat="server"   text='<%# Eval("Counter")%>'
                                     onclick="LinkButton1_Click"></asp:LinkButton>
                             </ItemTemplate>
                             <DragHandleTemplate>&nbsp;</DragHandleTemplate>
(won't work at all without this template)
                         </cc1:ReorderList>
                         <asp:ObjectDataSource ID="PanelListds"
runat="server"
                             OldValuesParameterFormatString="original_{0}"
SelectMethod="GetData"
                             TypeName="ProposalCountersTableAdapters.GetProposalforAbstractbyPanelTableAdapter">
                             <SelectParameters>
                                 <asp:ControlParameter ControlID="PanelDDl"
Name="panel"
                                     PropertyName="SelectedValue"
Type="String" />
                             </SelectParameters>
                         </asp:ObjectDataSource>
          </ContentTemplate>
          (If I put a trigger here, the code will open a new window, but I
get a full refresh of this page for the other functions.)
                        </asp:UpdatePanel>

Code Behind for Linkbutton
Protected Sub LinkButton1_Click(ByVal sender As Object, ByVal e As
System.EventArgs)
        Dim myref As New GetsinglePanel.GetReview
        Select Case RadioButtonList1.SelectedValue
            Case "Reviews"
               '  Updates literal field on page - this works in all cases
           Case "Proposal"
                'Want  to open an aspx page in a new window based on value
clicked in list
                Dim myscript As String
                myscript = "<script language='javascript'
type='text/javascript'>"
                myscript += "window.open(" & _
                "'DLProp.aspx?counter=" & sender.text &
"','win','toolbar=0,location=0,directories=0,status=1,menubar=1,scrollbars=1,resizable=1');"
                myscript += "</script>"
                Me.ClientScript.RegisterClientScriptBlock(Me.GetType(),
"myscript", myscript)
or
            System.Web.HttpContext.Current.Response.Write(myscript)
        End Select

    End Sub

Hello Haim,

Based on my understanding,  you have a DropDownList to handle the
LinkButton functionality. But it didn't execute the JavaScript you
registered from the server-side. If I have misunderstood you, please feel
free to let me know.

I think the problem is that script register is not in the right way. Within
UpdatePanel, we can't use Response.Write or  Server.Transfer, otherwise we
will encounter the error
"Sys.WebForms.PageRequestManagerParserErrorException" . If you want to get
further information about it, you can check the below link:
http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagereque
stmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx

In this case, neither Response.Write nor ClientScript can be used to
register the JavaScript to the client. I suggest you use
ScriptManager.RegisterStartupScript to do it. It will work within
UpdatePanel.

Please try to modify the existing code as following to see if it works:

Case "Proposal"
                Dim myscript As String
                myscript = "window.open(" & _
                "'DLProp.aspx?counter=" & sender.Text &
"','win','toolbar=0,location=0,directories=0,status=1,menubar=1,scrollbars=1
,resizable=1');"
              ScriptManager. RegisterStartupScript(Me,Me.GetType(),
"myscript", myscript, True)



Sincerely,

Vince Xu

Microsoft Online Support

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Dear Vince,
Thank you very much for your informative and helpful post.  Your code solved
this problem.

Haim
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