protected void btnInsert_Click(object sender, EventArgs e)
{
DBOps db = new DBOps();
string _key = txtInsertKey.Text;
string _value = (txtInsertValue.Text);
long contactno = long.Parse(txtContactNo.Text);
int retval = db.InsertSupplierTable(_key, _value, contactno);
lblInsertInfo.Text = retval.ToString() + " rows inserted";
lblInsertInfo.DataBind();
RefreshTable();
}