Hi experts
I have some problem when executing some code to create a dropdown selection menu with ajax dropdown on multiple columns it shows the error message "The control with ID 'HoverMenuExtender1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that needs it.". How can I get rid of it.
Need help with ajax dropdown on multiple columns selection.
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Hello there,
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The piece of  the problematic code would be of a great use to help you solve the problem.Â
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Anyhow, the problem is most likely in the version of the toolkit you are using. I assume you're using the normal script manager, and if that's the problem, please, move to the toolkitscriptmanager as that will solve the issue.
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To do so, simply rewrite the previous AJAX toolkit with the new one, and at the top of your code add this line:
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<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"></asp:ToolkitScriptManager>Â