"/" Server error in application, Application Server

"/" Server error in application, Application Server

This problem occurs when I typed the ASP. NET verification control example a few days ago:

However, we should be familiar with this problem. We also encountered this problem during the previous round. The solution at that time was:

Find in web. config
<Deleetask>
<Add key = "aspnet: UseTaskFriendlySynchronizationContext" value = "true"/>
<Add key = "ValidationSettings: UnobtrusiveValidationMode" value = "WebForms"/>
</AppSettings>
Delete <add key = "ValidationSettings: UnobtrusiveValidationMode" value = "WebForms"/>.
 
Or, if there is no such sentence: add it to the ettings byte
<Add key = "ValidationSettings: UnobtrusiveValidationMode" value = "None"/>

Then run it again.

But why?

Cause: vs creates an empty website and does not introduce the AspNet. ScriptManager. jQuery. dll file.

So we can solve this problem through another method: Find AspNet. ScriptManager. jQuery. dll and put the file under the binfile of the specified project.

Conclusion: if a problem occurs, we must learn how to solve it, but we must also know why it occurs so that we can better understand it.

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