Recently when creating a site analysis with the IIS Search Engine (SEO) Toolkit for this page, an error occurred:

An unexpected error has occurred.
Error details: “System.ArgumentException: An entry with the same key already exists.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.SortedList`2.Add(TKey key, TValue value)
at Microsoft.Web.Management.SEO.Crawler.XmlCrawlerReportProvider.XmlCrawlerReport.GetProperty(String name)
at Microsoft.Web.Management.SEO.Crawler.UrlInfo.SetPropertyValue(String name, Object value)
at Microsoft.Web.Management.SEO.Crawler.Parsers.HtmlLinkParser.GetLinksInternal(CrawlerProcessContext result, Uri baseUri, String text, CrawlerSettings settings, Boolean isSnippet, Boolean& noIndex)”.

Until now, I am not aware of a resolution for the error. My assumption is that some content on the page is ambigous.

To handle keyboard input in code on a form level, even if a control on the form currently has the focus, simply set the KeyPreview property of the form to true.

This configures that the form will receive key events before the event is passed to the control that has focus.

See also this Microsoft HOWTO article.

(Keyword: keypress, keypressed, keydown, key press, key pressed, key down)

Beim Aufruf von Server.MapPath in der Global.asax-Datei tritt unter IIS 7 oder IIS 7.5 die Fehlermeldung auf:

Servervorgang steht in diesem Kontext nicht zur Verfügung.

Auf Englisch:

Server operation is not available in this context.

Um das zu lösen einfach System.Web.Hosting.HostingEnvironment.MapPath stattdessen verwenden.

Siehe auch diesen Artikel bei Stack Overflow dazu.

Just upgraded my PHP and Apache installation on Windows. After the upgrade, the PHP pages are not executed on the server anymore but the code was sent to the browser.

Doh!

Solution was to add a line to the “httpd.conf” file:

AddType application/x-httpd-php .php

Seems that the upgrade somehow removed the line from somewhere, maybe in the “mime.types” file.

The line has to be added inside the “IfModule mime_module”, like in the following excerpt:

<IfModule mime_module>
    AddType application/x-httpd-php .php
</IfModule>

Works well after that. Remember to restart Apache.