How to clear particular cache value in c#?

Question

0.00/5 (No votes)

See more:

I am storing a user name into cache["sKey"] in login page if this cache variable is empty then will go to login page.But after log out have to clear this object data.I tried with below

C#

public void empLogin()
        {
            try
            {
string sKey = txtUName.Text + txtPwd.Text;
                            string sUser = Convert.ToString(Cache[sKey]);

                            if (sUser == null || sUser == String.Empty)
                            {
                                TimeSpan SessTimeOut = new TimeSpan(0, 0, HttpContext.Current.Session.Timeout, 0, 0);
                                HttpContext.Current.Cache.Insert(sKey, sKey, null, DateTime.MaxValue, SessTimeOut,
                                System.Web.Caching.CacheItemPriority.NotRemovable, null);
Session["user"] = txtUName.Text + txtPwd.Text;
if (userType == "Admin")
{
  Response.Redirect("~/Admin/DashBoard.aspx");
}
 }
else
   {
    ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alert", "alert('This User Alredy logged in');", true);
   }

in logut button click.

C#

protected void linkLogout_Click(object sender, EventArgs e)
{
  Cache["sKey"] = string.Empty;
  Response.Redirect("~/LoginPage.aspx");
}

Posted 17-May-15 22:23pm

abbas azaad

Add a Solution

3 solutions

Solution 3

Your code is a bit all over the place. You are storing the username in the Session and also the Cache? Secondly your cache key is username + password so if I log in the cache key is "usernamepassword", but in your logout click you are clearing the key called "skey". This is the literal string "sKey", not the contents of the variable sKey which does not exist in your function. To clear from the cache you use Cache.Remove but you need to know the key to remove, and you don't as your key is dynamic. Also cache is the same for everyone, it isn't per-user.

My advice is to ignore the cache, just store things in the session and on your logout link

Session.Abandon()

Posted 17-May-15 22:38pm

F-ES Sitecore

Comments

abbas azaad 18-May-15 4:56am

session.abandon also not working.

F-ES Sitecore 18-May-15 5:03am

You'll only see the session abandoned at the next page request, it doesn't abandon immediately.

Solution 1

Cache.Remove("Key")

Posted 17-May-15 22:33pm

siddartha kopparapu

Comments

abbas azaad 18-May-15 5:36am

its not working

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

DamithSL · Accepted Answer · 2015-05-17T22:37:00

Solution 2

change Cache.Insert as below

C#

HttpContext.Current.Cache.Insert("sKey", sKey, null, DateTime.MaxValue, SessTimeOut,
                                System.Web.Caching.CacheItemPriority.NotRemovable, null);

current problem is your Cache key name is not "sKey" it is combination of txtUName.Text and txtPwd.Text

Posted 17-May-15 22:37pm

DamithSL

Updated 17-May-15 23:13pm

v2

Comments

abbas azaad 18-May-15 4:54am

if I clear all cache value then text boxes wouldnt save name pwd which is working on check change event of check box.

abbas azaad 18-May-15 4:54am

mean in "remember me" option.

DamithSL 18-May-15 5:14am

check my updated answer

abbas azaad 18-May-15 5:39am

so in this i can remove username and pwd from session and can save textboxes values if checked check box...so the above code where have to implement?

abbas azaad 18-May-15 5:48am

very very thanq ...i got it now..