MARKAND911 -1 Junior Poster

I have a master page named "masterpage1.master".
And a content page named "listTopic.aspx".
Now there is one listview control on my masterPage called "listview1"
"listTopic.aspx" uses "masterpage1.master" as its master page.
Now i want the CommandArgument of listview1 when any item in listview1 is clicked.
I want this commandArgument in my content page i.e listTopic.aspx.
How can i do this.