Setting up DropDownList control to accomodate invalid values.

Does your dropdown control return messages like

DropDownList has a SelectedValue which is invalid because it does not exist in the list of item

Here’s an example of how to fix this

The Gridview control displays a table on steriods. You can sort, group, and numerous other things. It's considered a great control.

Component One aka Grape City is a company who markets graphic controls. Here is a description of some of those controls.

Almost all web controls in an asp.net allow you to specify colors. Font colors, background colors, foreground colors. Many controls give you lots of properties to specify colors. Fortunately, they all use the same color coding schemes.

The Checkbox control displays a checkbox on a webpage. Values returned are Boolean True and False.

The is a general button.

Sometimes when you are creating content in hexo pages, some of the characters you use is intercepted by hexo and not displayed. Sometimes that stuff that is not displayed is captured by the Hexo processor, and will throw error messages. You get around this using escape characters.

Sometimes you want to add a link in your hexo pages, and you want that link to take you to another website.

Ajax was a technology added to ASP.Net Web Pages. Basicially it allowed you to add Javascript to your web page that would make a call to your server, to send and or retrieve data, without causing the web page to perform a postback.

Ajax was an attempt to reduce the number of full round trips of a webpage going back to the server. It did this by giving you controls which were containerized enough such that the container and it’s contents would do the postback to the server.