How can I keep TempData when browser refresh but null if user leave the page

user_14264157 0
Viewed 417

Is there anyways to keep TempDate if browser or page refresh but null or reset if user leaves to another page then go back.

I am able to Keep TempData using TempData.Keep() but I want to reset it if user go to another page and come back.

var projectId= TempData["projectId"];
    TempData.Keep("projectId");
asp.net-core asp.net-mvc asp.net javascript c#
2 Answers

TempData is designed to have a life span only in between the current and the next request. You'd have to re-store it on every request (or call .Keep()) to make it available on the subsequent request. You would be better of using a Session object or retrieving it from your user identity.

However you can "keep" your TempData object, if you call .Keep() after calling it (displaying counts towards calling).

<li class="nav-item">                   
     <h5 style="color:white"> Welcome, @TempData["username"]</h5>
     @TempData.Keep("username")
</li>

Yet another way to circumvent this, is to use .Peek():

<li class="nav-item">                   
     <h5 style="color:white"> Welcome, @TempData.Peek("username").ToString()</h5>
</li>
user_155709270

I suggest using Session instead:

Session["projectId"] = projectId;

var projectId = Session["projectId"];
user_155273410
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