How to use TempData Keep() vs Peek() in ASP.NET MVC
By Tan Lee Published on Feb 18, 2024 585
Your object in a TempDataDictionary is read, it will be marked for deletion at the end of that request
That means if you put something on TempData like
TempData["category"] = "your value";
first request
object value = TempData["catetory"];
second request
object value = TempData["category"]; //value = null
If you want to keep value you can use Keep method.
object value = TempData["category"]; //keep it to use later TempData.Keep("value"); //second request, read value and mark it for deletion object value = TempData["category"];
If you want to retain the value for another request, you can use Peek. Use Keep when retaining the value depends on additional logic.
//It will be not deleted at the end of the request object value = TempData.Peek("category"); //second request, read value and mark it for deletion object value = TempData["category"];
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