Code Den

IIS7.5 “HTTP Error 500.19 – Internal Server Error”

The symptom The search for a cause and a solution The actual cause and soluion The symptom After loading an ASP.NET web application on an IIS7.5 server, navigating to the site resulting in the following error: The search for a cause and a solution The first step was this Microsoft KB Article that breaks down [...]

IIS7 Sessions Getting Crossed / Mixed Up / Copied

The symptom What it was not What it was The solution The symptom Users reported seeing data that did not belong to them when they logged into their accounts. Logs showed that nearly 10% of our users were being assigned copies of other users’ sessions. The entire session object was copied, including the sessionVariables and [...]

Why the scrollbar won’t show on the left in Firefox

The Scenario When designing a website for a right to left (RTL) language the scrollbar should automatically be on the left hand side. The logic is that it should be at the end of the line, just as it is on the right for a left to right (LTR) language. This works fine in IE, [...]

WUMP – Website Uptime Monitor Program

Click here: http://wump.codeplex.com/Wiki/View.aspx?title=Home&ProjectName=wump to download the WUMP from its CodePlex page. What is WUMP? After a frantic call from a client who found her site was down due to a server issue, I decided I needed a way to regularly monitor the sites I consult for. WUMP, the Website Uptime Monitor Program, is the resulting [...]

CalendarExtender Plus 1.0.2.0

to download the latest version of CalendarExtender Plus and documentation. The CalendarExtender Plus is a modification of the calendar extender that ships as part of the Ajax Control Toolkit. There are two main features added to the control. First, you can limit the selectable dates to a specified date range. Second, there is now the [...]

Show a Wait Message While Waiting for Postback to Complete

Scenario Among the controls on a page is an update panel with a button that when clicked causes a partial postback that takes at least a few seconds. During this time you want to show the user a wait message that will disappear as soon as the postBack completes. Solution

Default a TabContainer to No Tabs Selected

Question Under normal circumstances when a page loads with a tabContainer on it one tab must be selected. The selected tab can be specified via the ActiveTabIndex property. What if the tabContainer needs to default to an empty tab with none of the tabs selected? Solution Add a dummy tabPanel to the tabContainer and leave [...]

Show a Wait Message While Generating a File for Download

Scenario A page has a list of images for the user to choose from. When a file is selected the request is processed via an AJAX call that directs the source of an iFrame to another page where the image is generated and passed back to the client. Due to the size of some of [...]

Introducing CalendarExtender Plus

The CalendarExtender Plus is a modification of the calendar extender that ships as part of the Ajax Control Toolkit. There are two main functionalities added to the control. First, you can limit the selectable dates to a specified date range. Second, there is now the option to show an alternate header. The new header includes two DropDown Lists, one to select the month and one to select the year.

ComboBox ClientSide onChange Event

The Issue The comboBox has a couple of server side events to deal with field changing. OnSelectedIndexChanged OnTextChanged How can we catch the comboBox changing on the client side? The Solution Without access to these function on the client side, we need to use the client side events of the textBox that is contained within [...]