Quick and dirty asp.net DropDownList selection required validation

by Andrew Jackson 23. October 2006 19:00

I needed to do the usual thing, present a drop down list with the first item as a fake one being something like "-- Choose a Category --"

I jumped straight in and started thinking about custom validation etc etc and lost the will to live very quickly - considering this was just supposed to be a quick knock up project.

Then I found this little snippet, using the RequiredFieldValidator you can specify an InitialValue, put this to be your "-- Choose a Category --" and your away, it won't validate unless it's something other than that!

OK, it's not the most elegant solution, I'd prefer value, or even item being 0 comparison but it does in a push and worth remembering.

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My first CodeProject article

by Andrew Jackson 22. October 2006 16:49

I submitted my first article to CodeProject today.

It's one of my favourite sites when looking for articles on new areas I haven't dealt with before so I thought i'd share my technique of using custom attributes and reflection in vb.net.  I demonstrate how to use it to read query string parameters easily into fields without all the repetitive code.

Have a read and see what you think

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