AJAX :: DropDown Control Filled By Server Then Opened In Client?
Aug 12, 2010
I tried to use a DropDown-Control (WebDropdown from Infragistics) for the following function: Let the user enter any text or if he wishes choosing by a context menu two different "Already exist entries" in the DropDown-List from where he can choose a value. The behaviour should be this for the DropDown: Right-clicking on the DropDown-Control, filling the DropDownList in the server depending on the choosen context menu item, opening the DropDownList in the client.
The way I tried to solve:
Open (by javascript) a context menu by right clicking on the control
[Code]....
What's the problem? The problem is, that the above javascript function does find the WebDropDown1 control only if it is called client side (e.g. with a OnClientClick button event), calling it from server side (as in the ContextMenu_ItemClick subroutine) it does not find the WebDropDown1 control. The error is shown (translated into english): run time error: object expected.
Maybe a completly different solution is necessary as I transfer a windows forms program into a web form ajax style program. I could use a textbox with dropdownextender for example. But the problem seems to be always the same: uncoupling the dropdown function, which is a client side one, by first filling the dropdownlist on server side, and then invoking the dropdown event makes the problem.
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