protected void btnInsert_Click(object sender, EventArgs e)
{
DBOps db = new DBOps();
string _key = txtInsertItem.Text;
long _value = long.Parse(txtInsertQuantity.Text);
string lab = ddlInsertLab.SelectedValue;
int retval = db.InsertInventoryTable(_key, "", _value, lab, "", "");
lblInsertInfo.Text = retval.ToString() + " row inserted";
lblInsertInfo.DataBind();
RefreshTable();
}