string[] path how to stored in Session

The "path" array will contain each directory in the file path as a separate element.  For example, if my filename is "C:\Windows\foo.txt" and I execute:

string[] path = filename.Split('\\')

Then the path array will contain the following elements:

path[0] = "C:"
path[1] = "Windows"
path[2] = "foo.txt"

To retrieve the array, you'll have to cast the session variable as a string array as Dorababu explained.

If you want to store the path as one string instead of an array then you can just do this:

Session["path"] = asyncImage.PostedFile.FileName;

This is a sample try it as per your

string[] a = new string[]{"a","b","c"};
Session["values"] = a;

And in the next page, you can retrieve it like this.

string[] a = (string[])Session["values"]