After attempting to solve a JavaScript issue following an AJAX postback in ASP.Net by implementing some code, I encountered an unexpected error during the build process:
An unexpected error occurred: The name 'ScriptManager' does not exist in the current context
I have utilized ScriptManager in the past without any issues. Why is it causing problems now? Shouldn't it be accessible on all ASP.Net pages? It's worth noting that I do have a script manager on my master page...
If you are facing the issue of not finding ScriptManager in the System.Web.UI namespace, try adding a reference for System.Web.Extensions. To do this, navigate to the solutions explorer, right-click on your project, select "Add Reference," go to the .Net tab, choose System.Web.Extensions, and click OK. I encountered the same problem even after using System.Web.UI, but this solution resolved it for me.
It's possible that there are multiple reasons why this error message is appearing. However, in my case, the solution was simply adding the following line at the beginning of my code-behind file:
using System.Web.UI;
Hopefully, this tip will be useful to someone and save them some time.
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