private void btnSave_Click(object sender, EventArgs e)
{
ArrayList users = cblUsers.GetSelectedValues();
d.CaseUserLink cul = new d.CaseUserLink();
int caseId = getCaseId();
cul.DeleteByCase(caseId);
foreach (string userId in users)
{
cul.Create(caseId, Convert.ToInt32(userId));
}
Response.Redirect("caseList.aspx");
}