I have a basic question:

my page:

<div>
        <asp:LinkButton ID="LinkButton0" onclick="LinkButton_Click" runat="server" CommandArgument="0">0</asp:LinkButton>
        <asp:LinkButton ID="LinkButton1" onclick="LinkButton_Click" runat="server" CommandArgument="1">1</asp:LinkButton>
        <asp:LinkButton ID="LinkButton2" onclick="LinkButton_Click" runat="server" CommandArgument="2">2</asp:LinkButton>
        <asp:LinkButton ID="LinkButton3" onclick="LinkButton_Click" runat="server" CommandArgument="3">3</asp:LinkButton>
    </div>

code behind:

protected void Page_Load(object sender, EventArgs e)
{
     Foo (PageIndex);    
}

  int _pageIndex;
  public int PageIndex
  {
      get
      {
          object objPage = ViewState["_pageIndex"];

          if (objPage == null)
          {
              _pageIndex = 0;
          }
          else
          {
              _pageIndex = (int)objPage;
          }

          return _pageIndex;
      }
      set {ViewState["_pageIndex"] = value; }
  }



  protected void LinkButton_Click(object sender, EventArgs e)
  {                
      PageIndex = int.Parse(((LinkButton)sender).CommandArgument);
  }

The problem is with Page_Load event, I expect to get new PageIndex after the linkbutton is clicked.