Postback problem with web parts

9 Feb 2006 5:20 PM

Vince Varallo

Is there anyway to prevent a postback event when a web part is moved into a
different zone? I am using the MSNBC weather web part and it fires a java
script which is causing an error because the page is posting back.

Thanks in advance,
Vince

10 Feb 2006 5:46 AM

DWS

Vince,
I see you've spent two days on this. Tell us what the error is and maybe
someone in the group can help fix the error instead of preventing the
postback. In the mean time I know a great deal about web parts maybe I'll
check out this msnbc webpart and try to duplicate the error for you. What
url did you download the webpart from?

Good Luck
DWS

Show quoteHide quote

"Vince Varallo" wrote:

> Is there anyway to prevent a postback event when a web part is moved into a
> different zone? I am using the MSNBC weather web part and it fires a java
> script which is causing an error because the page is posting back.
>
> Thanks in advance,
> Vince

11 Feb 2006 2:37 AM

Vince Varallo

OK, here is the code,

Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs"
Inherits="_Default" %>

<%@ Register Src="Weather.ascx" TagName="Weather" TagPrefix="uc1" %>

<!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">
    <div>
        <asp:WebPartManager ID="WebPartManager1" runat="server">
        </asp:WebPartManager>
        <table style="width: 100%; height: 100%">
            <tr>
                <td style="width: 72px">
                    <asp:WebPartZone ID="WebPartZone1" runat="server"
Height="576px" Width="282px">
                        <ZoneTemplate>
                            <uc1:Weather ID="Weather1" runat="server"
title="Weather" />
                        </ZoneTemplate>
                    </asp:WebPartZone>
                </td>
                <td style="width: 100px">
                    <asp:WebPartZone ID="WebPartZone2" runat="server"
Height="551px" Width="303px">
                    </asp:WebPartZone>
                </td>
                <td style="width: 100px">
                    <asp:WebPartZone ID="WebPartZone3" runat="server"
Height="557px" Width="288px">
                    </asp:WebPartZone>
                </td>
            </tr>
        </table>

    </div>
    </form>
</body>
</html>

Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

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

    }

    void Page_Init(object sender, EventArgs e)
    {
        WebPartManager1.DisplayMode = WebPartManager.DesignDisplayMode;
    }
}

Then i have the weather part in a user control.
Weather.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Weather.ascx.cs"
Inherits="Weather" %>
<a href="javascript:WeatherPers();">Change Location</a>
<div id="msnbcWea_WPQ_" _locID="L_Loading_Text">This webpart requires
Microsoft Internet Explorer 5.0 or higher</div>
<script id="msnbcWeaData_WPQ_" language="javascript"></script>
<script id="msnbcWeaRend_WPQ_" language="javascript"
src="http://www.msnbc.com/m/chnk/r/weather_r_src.js"></script>
<script id="msnbcWeaMain_WPQ_" language="javascript"
src="http://www.msnbc.com/m/dd/wea_dd_m_src.asp?uid=_WPQ_"></script>

Then run the project and drag the weather part from zone 1 to zone 2.
Then drag it from zone 2 to zone 3. This is when the error occurs in the
java script.

It is in the WeatherMain() javascript which is coming from msnbc.
oDiv.style.padding = ...

Thanks,
Vince

Show quoteHide quote

"DWS" wrote:

> Vince,
> I see you've spent two days on this. Tell us what the error is and maybe
> someone in the group can help fix the error instead of preventing the
> postback. In the mean time I know a great deal about web parts maybe I'll
> check out this msnbc webpart and try to duplicate the error for you. What
> url did you download the webpart from?
>
> Good Luck
> DWS
>
> "Vince Varallo" wrote:
>
> > Is there anyway to prevent a postback event when a web part is moved into a
> > different zone? I am using the MSNBC weather web part and it fires a java
> > script which is causing an error because the page is posting back.
> >
> > Thanks in advance,
> > Vince

15 Feb 2006 4:10 PM

DWS

Vince,
Sorry I took so long. I have a work around. Basicly what I'm doing is
surrounding the control and with a panel and setting the visibility false
when the page displaymode allows design. You could expand this with a label
or something that says "MSNBC Weather is not available in design mode".

Partial Class ctrlmsnbc
    Inherits System.Web.UI.UserControl

    Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.PreRender
        Try
            pnlwebpart.Visible = Not
WebPartManager.GetCurrentWebPartManager(Page).DisplayMode.AllowPageDesign
        Catch ex As Exception

        End Try
    End Sub
End Class

<%@ Control Language="VB" AutoEventWireup="false"
CodeFile="ctrlmsnbc.ascx.vb" Inherits="ctrlmsnbc" %>

<asp:Panel runat="server" ID="pnlwebpart">

<a href="javascript:WeatherPers();">Change Location</a>
<div id="msnbcWea_WPQ_" _locID="L_Loading_Text">This webpart requires
Microsoft Internet Explorer 5.0 or higher</div>
<script id="msnbcWeaData_WPQ_" language="javascript"></script>
<script id="msnbcWeaRend_WPQ_" language="javascript"
src="http://www.msnbc.com/m/chnk/r/weather_r_src.js"></script>
<script id="msnbcWeaMain_WPQ_" language="javascript"
src="http://www.msnbc.com/m/dd/wea_dd_m_src.asp?uid=_WPQ_"></script>

</asp:Panel>

Good Luck
DWS

Show quoteHide quote

"Vince Varallo" wrote:

> Is there anyway to prevent a postback event when a web part is moved into a
> different zone? I am using the MSNBC weather web part and it fires a java
> script which is causing an error because the page is posting back.
>
> Thanks in advance,
> Vince