Session become null atomatically, Why?

Vikas Ahlawat

when i execure the code for delete a folder then the session became null?
why?

code for delete the folder here

DirectoryInfo thisThumnials = new DirectoryInfo(Server.MapPath("../Albums/" + categoryID + "/Images/" + "/ThumnailImages"));

DeleteFolder(thisThumnials);

public void DeleteFolder(DirectoryInfo df)
    {
        try
        {
            if (df.Exists)
            {
                foreach (FileInfo fi in df.GetFiles())
                {
                    fi.Delete();
                }
                if (df.Exists)
                {
                    df.Delete();
                }
            }
        }
        catch
        {
        }
    }

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

Abhimanyu K Vatsa15y ago
Accepted answer
hi vikash

lots of discussions i made when i where struggling with this issue. look, as i know there is no any straight-forward method (look microsoft feedback section) for such issue read this. however, we have couple of ways to overcome this issue.

first, if deleting folder is making problem then don't create the folder inside application root.

second, look at this
Zoran Horvat15y ago
This is really interesting and you're right. I've never tried to delete directory under application path or otherwise I'd notice the same effect.

So you have resolved your own question.
Zoran Horvat15y ago
Try to test the hypothesis of session deleting on that particular code. Also, note that you don't have to iterate all files manually - you can use DirectoryInfo.Delete(Boolean) method to delete the directory recursively. Try this code and tell me what is the output:

Session["Test"] = "Test_variable";

try
{

    DirectoryInfo thisThumnials = new DirectoryInfo(Server.MapPath("../Albums/" + categoryID + "/Images/" + "/ThumnailImages"));
    thisThumnials.Delete(true);

}
catch
{
}

string test = (string)Session["Test"];
Response.Write(test ?? "");

Zoran
Vikas Ahlawat15y ago
no it is not long.
http://stackoverflow.com/questions/638668/delete-directory-from-asp-net-application-returns-to-new-session
I got that when we delete any directery then all session will clear.
is there any solution of my problem?
Zoran Horvat15y ago
When you say that session becomes null, do you mean some particular session variable?

Another question is how long does this code execute? If it is very long operation and session expiration is set to very short time then session would naturally expire.

Please provide more information about the code being executed.

Zoran