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How can I remove the cache of a page (cached with VaryByParam) for certain request params in code

Platform: ASP.NET| Category: Output Caching

You can attach a cache dependency to the response that is unique per query param, then invalidate the dependency for that particular param:

// add cache item dependency on response 
string cacheKey = 'xxx.aspx?' + queryParam; 
Cache[cacheKey] = new object(); 

// invalidate the dependency 
string cacheKey = 'xxx.aspx?' + queryParam; 

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