Check out the AJAX Color Editor control for a control that displays a color picker. This project includes source code that shows how to incorporate the Web Control in an ASP.NET page. The Color Picker is based on AJAX technology that provides partial rendering for the control, giving it the feel of a fat client.

Table 1 displays the Color Picker. The control displays 2 color palettes – one for the back color and the second for the fore color. The sample text to color shows the selected back and fore colors.

The Color Picker uses:

• The COR project provides a set of public static methods for adding Controls.
  
• AJAX technology provides partial rendering for the control, giving it the feel of a fat client
  

COR Project

The Color Picker is a Web Control. It is created programmatically using public static methods from the 'C' class in COR.

Q: What is COR?
A: COR is software that helps power users to become Web gurus by letting them build and maintain Web Sites. Users, with only browser, can log on to the Web Site to modify or create pages. Pages employ templates that support the placement and editing of web parts by the user (shown below – notice the 'Edit' and 'Delete" controls).

Q: How is COR different from web pages built using Microsoft ASP.net?
A: COR is a small layer of management software that is built directly on top of ASP.net 2.0. It takes full advantage of ASP.net Web Parts to implement its functionality. You get the full power of ASP.net 2.0 without requiring a software programmer for all, but the most complicated web pages.

Q: What Web Parts come with COR?
A: COR comes with a Library of 30 Web Parts. One notable inclusion in the library is a Word Web Part. It allows users to update content using Microsoft Word. Tables, formatting, and pictures in the Word document are automatically converted to HTML by the Word Web Part.

Q: What are some of the other key features of COR?
A: COR directly supports a menu bar across the top of the page and a menu bars on either the side of the page. COR also keeps track of the user's location in the WEB site by displaying "bread crumbs".

Q: What does COR stand for?
A: COR stands for Controls On the Right. This is because when a user is editing a page the controls are displayed on the right hand side of the page. The example below shows the 'controls on right' being employed to add a web part to the header area of the page.

Q: Why did you build COR?
A: We built COR because we needed something to build our own WEB sites. We started by building our Web sites using just ASP.net pages and eventually evolved to COR. We also use COR to build Jetfire Workflow solutions.

Q: Why not just use SharePoint?
A: Microsoft SharePoint is a wonderful product. Many of the features of COR look very similar to SharePoint. COR; however is a much lighter product that is focused on building Web sites.

Q: How much does COR cost?
A: COR is free. The source code is available and does not have any restrictive licensing requirements (BSD license). See COR-Why make it free? and Open Source License Favorites for more details.

Q: How can I extend COR or add a new WEB Part?
A: COR is well documented and uses standard Microsoft programming patterns. An experienced programmer should have no trouble extending COR or adding a Web Part. Naturally, we can be contracted to add new features or build new Web Parts (contact us).

Q: Where can I download COR?
A: www.codeplex.com/cor

Q: What is the difference between DotNetNuke and COR?
A: DotNetNuke employs Web controls and is based on .Net 1.1. Pages in DotNetNuke are built by programmers. COR uses Web Parts and is based on .net 2.0. Pages in COR are built by privileged user(s).

Q: What is required get a Web site running using COR?
A: COR can use, as the server, any Windows or Vista PC that supports Internet Information Services and Forms authentication. Many ISPs support this configuration. The ISP we use is LFC Hosting.

Q: Are there some examples of sites that use COR?
A: yes.

Jetfire
Ontario Amateur Wrestling Association
National Capital Wrestling Club
Ottawa Wrestling Festival
Canada Cup
Arbutus Associates

See Also
COR-Why make it free?
Open Source License Favorites
Download COR from CodePlex

You would think that the display of line numbers should just be automatic when using Visual Studio 2005 or 2008. After all when using a C# compiler all the errors are given by a line number. Also when exceptions occur the stack traces gives the line numbers of the stack (procedure calls) and the line number of the offending code that caused the exception. Unfortunately, by default the line numbers are not visible when viewing the code in Visual Studio. In fact many programmers work for months and even years before finding this important setting.

To display line numbering in Visual Studio 2005 or Visual Studio 2008 click the following sequence.

Tools/Options/Text Editor/C#/General and select "Display/Line Numbers".

Visual Studio C# text editor with line numbers off (default). Note no line numbers.

Select the Tools from the main menu bar, then Options.

Select Display/Numbers so that line numbers are displayed.

Visual Studio C# text editor with line numbers turned on. Note the line numbers on left.

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