hi friends,

i am using gridview in my asp.net page .. i have added checkbox in gridview column.. gridview contains edit paging,edit selecting also.. i have added coding in page index changing like this

{
ArrayList emplist = new ArrayList();
int index = -1;
foreach (GridViewRow row in GridView1.Rows)
{
index = (int)GridView1.DataKeys[row.DataItemIndex].Value;
bool result = ((CheckBox)row.FindControl("CheckBox1")).Checked;

// Check in the Session
if (Session[CHECKED_ITEMS] != null)
emplist = (ArrayList)Session[CHECKED_ITEMS];
if (result)
{
if (!emplist.Contains(index))
emplist.Add(index);
}
else
emplist.Remove(index);
}
if (emplist != null && emplist.Count > 0)
Session[CHECKED_ITEMS] = emplist;
}


i can select some rows in first page .. when i click second page it shows error
"
Index was out of range. Must be non-negative and less than the size of the collection."

how to solve this problem .. plz help me