When ASP.NET controls are rendered their ids sometimes change, like if they are in

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Asked: May 11, 20262026-05-11T08:42:22+00:00 2026-05-11T08:42:22+00:00

When ASP.NET controls are rendered their ids sometimes change, like if they are in

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When ASP.NET controls are rendered their ids sometimes change, like if they are in a naming container. Button1 may actually have an id of ctl00_ContentMain_Button1 when it is rendered, for example.

I know that you can write your JavaScript as strings in your .cs file, get the control’s clientID and inject the script into your page using clientscript, but is there a way that you can reference a control directly from JavaScript using ASP.NET Ajax?

I have found that writing a function to parse the dom recursively and find a control that CONTAINS the id that I want is unreliable, so I was looking for a best practice rather than a work-around.