Can anybody tell me how can I implement something like the Stack Overflow tags autocomplete textbox, with Ajax?
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Can anybody tell me how can I implement something like the Stack Overflow tags autocomplete textbox, with Ajax?
The easiest and simplest way is using the AutoCompleteExtender in the Ajax Controls Toolkit.
This uses a WebService to feed data to the control and can be linked to an existing TextBox. However you can also make use of a PageMethod to feed the extender.
Alternatively you can roll your own using JavaScript and the ScriptManager, however it can be quite tricky. I have recently tried with JQuery and it is definitely simpler.