Wallonman's Code

Thursday, July 29, 2010

Dotnetnuke roundtrip redirection

Symptom
After a deployment of Dotnetnuke, or after a change in the overall configuration (changing connection string for instance), the navigator seems redirecting infinitely until it stops with an error indicating that there are too much redirections.

Evidences
Looking with Fiddler what's happen, you get that kind of content:

<head>

<title id="Title"> Error </ title>

<link id="StyleSheet" href="/dnn/Install/Install.css" type="text/css"

rel="stylesheet"> </ link>

</ head>

<body>

<form name = "Form" method = "post" action = "ErrorPage.aspx? status = 500 &

 = Thread error was + + + being aborted." id = "Form">

<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="blablabla" />

cellspacing="5" cellpadding="5" <table border="0" class="Error">

<tr>

<td> id="Image1" src="logo.gif" alt="DotNetNuke" <img border="0" /> </ td>

</ Tr>

<tr Style="height:100%;">

<td Valign="top" style="width:650px;">

<h2> DotNetNuke Error: - Version 04.08.03 </ h2>

<hr />

<p> Thread was being aborted. </ p>

</ td>

</ Tr>

<tr>

<td align="right"> <a id="hypReturn" class="WizardButton"

href="Default.aspx"> <img border="0" /> src="/dnn/images/lt.gif"

Return to Site </ a> </ td>

</ Tr>

<tr> <td Height="10px"> </ td> </ tr>

</ table>

</ form>

</ body>

</ html>

Explanations
There is an Error somewhere in the Dotnetnuke startup process, therefore Dotnetnuke redirects to its error page, BUT the error page can't complete because of the Error. And so on...

Reasons
There is an error in the initialization process of Dotnetnuke. Here are some suspects:

web.config with an invalid value in the connection string for instance -> no database -> error
PortalAlias table has an invalid value (i.e. localhost)
.Net Trust Level is not set to Full Trust, or it seems that sometime setting successively Medium then Full forces the refresh of the virtual folder config (?!? I read that somewhere, I tried, and it worked)

Conclusions
The redirection is probably not due to any redirection rule (check anyway), but is due to the fact that there is an error in the configuration and the Dotnetnuke Error page is unable to complete.
Redirection to an error page that raises an error is nightmare, check with special attention all your configurations, and you'll find the origin of the error

Wednesday, June 16, 2010

MVC2 table stripping

Simple scripting tip to set an alternate class to each row of a table when rendering the HTML in an MVC2 view.

Here, my view is a typed view and extends system.Web.Mvc.ViewPage

   1:  <table>

   2:        <thead>

   3:          <tr>

   4:            <th>

   5:              Header 1

   6:            </th>

   7:            <th>

   8:              Header 2

   9:            </th>

  10:          </tr>

  11:        </thead>

  12:        <tbody>

  13:          <%

  14:            var rowClass = "";

  15:            foreach (var item in Model)

  16:            {

  17:              rowClass = string.IsNullOrEmpty(rowClass)

  18:                          ? "pair" : ""; %>

  19:          <tr class="<%= Html.Encode(rowClass) %>">

  20:            <td>

  21:              <%= Html.Encode(item.Name) %>

  22:            </td>

  23:            <td>

  24:              <%= Html.Encode(item.Firstname) %>

  25:            </td>

  26:          </tr>

  27:          <% } %>

  28:        </tbody>

  29:      </table>

14: There is a private rowClass variable defined as an empty string outside of the foreach loop
17-18: The rowClass variable is alternatively set to "pair" or "" according to its previous value
19: The value of rowClass is rendered as the 's class attribute values

Of course there must be a "pair" class defined in the css.

Thursday, September 6, 2007

Using Visual Studio 2005 to Design Abstract Forms

Looking on how to workaround the problem of abstract forms that are not editable through the Visual Studio Designer, I found that interresting article:

Using Visual Studio Whidbey to Design Abstract Forms (thank you Brian)

Here are the summarized steps to perform in order to quick-kix the issue:

Download Brian's project
Add the GeneralConcreteClassProvider.cs class to your project
Add that class in the same namespace than you abstract form, modifying the namespace
Add the following code to the head of your abstract class:

[TypeDescriptionProvider( typeof(GeneralConcreteClassProvider))]
[ConcreteClass(typeof(GeneralConcreteForm))]
Add the definition and implementation of the GeneralConcreteForm into your abstract form, and implement the abtract ptroperties, methods...

#region Concrete version of AbstractForm for Designer

// Here is a concrete version of AbstractForm that acts as a stand in

internal class GeneralConcreteForm : UIForm

{
```
 public override string AbstractProperty 
{
get { return null; }
set { ; }
```
}

#endregion
All you'll have to maintain, is the GeneralConcreteForm with the future abstract properties and methods.
That's it

Monday, July 2, 2007

Bookmarks

Frequently used bookmarks
http://mail.google.com/
http://www.google.com/calendar/

Less frequently used bookmarks
Color Scheme Chooser

I found an interresting site, remember to have a look there
http://webtest.canoo.com/
SoftComplex

Related to DotNetNuke
http://www.snowcovered.com/snowcovered2/Default.aspx?tabid=242&PackageID=8355