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An old friend of mine, Joe Shook, laughingly said, you should read what other people write too once in a while. Of course, he was right and naturally I do. I read almost everything I can get in my hands including technical books, blogs, and articles because I am surprised by the number of things I haven't mastered or that I still don't have a best practices sort of solution for. Thankfully I am still willing to stay up to 11 or 12 o'clockused to be until the next morningworking out the details of what I don't know until I am happy with an answer.A friend of mine actually asked me about this particular problem: what is a good way to bind a Drop Down List in a Form View.
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This is very, very simple, and you implement it using the On Item Command event handler.
The Item Command also applies to objects like the Form View, and adds a lot of flexibility to your applications.
Built-in commands include Insert, Update, Delete, Edit, and Cancel.
If you are using a container such as a Data Grid or a Data List, you can customize these commands by adding an event handler: But what if, instead of redefining the standard command, you want to create your own?
First add it to the container definition (a Form View in this example): You can do a lot of cool stuff in the Item Command procedure, but here we’re going to focus on a common problem: calculating fields before saving to the database.
For example, if you are uploading a file using the File Upload control, you can modify the Update command to save it in the database, or you may want to record the time each record is modified and the username of the person who modified it. Let’s look at how to handle some of the standard commands, using the Form View as an example.Cancel is an exception; to implement this command, run Form View.Data Bind to replace any changed fields with the values retrieved from the database. Let’s take a look at it first, then I’ll explain later: So – the first step is the create a button or link button invoking your custom command, in this case a command to retire an application.Since this particular challenge wasn't on my radar I provided him with a workable solution, but thought a better solution was possible.This article provides a comprehensive solution for defining an edit template in a Form View. The Form View is a binding control like the Grid View, except where the Grid View shows multiple rows of data and the Form View shows one record at a time in a form layout.Insert Item command (for example) from inside the Item Command handler if the Command Name actually is “Insert”. I wasn’t too clear about this in my own mind and as a result I wasn’t clear in this post. My Boog Pages is the personal blog of Graham Powell - writer, programmer, raconteur, impresario, a true Renassaince man (if they had computers in the Renassaince).