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我需要循環表中的所有記錄，這裏的cose在我的項目「Auction web system」中沒有正常工作，我在這裏使用web服務來檢查產品的狀態定期地，當狀態打開並且數據時間較少時，更新產品並將其狀態設置爲「關閉」。這裏的代碼僅適用於一行！我需要同時檢查所有行。我需要循環表中的所有記錄
{ string sql12 = "SELECT item_id FROM items Where status='opened' AND endDate<[email protected] ";
SqlCommand cmd12 = new SqlCommand(sql12, con);
con.Open();
cmd12.Parameters.AddWithValue("@endate", DateTime.Now);
query = Convert.ToInt32(cmd12.ExecuteScalar());
string sql123 = "UPDATE items SET status ='closed' WHERE item_id [email protected]_ID";
SqlCommand cmd21 = new SqlCommand(sql123, con);
cmd21.Parameters.AddWithValue("@Item_ID", query);
cmd21.ExecuteNonQuery();
con.Close();
CalculateWinningPrice(query);
}
public void CalculateWinningPrice(Int32 query)
{
string sql1 = "SELECT MAX(Bid_price) AS Expr1 FROM Bid WHERE (item_id = @Item_ID)";
SqlCommand cmd1 = new SqlCommand(sql1, con);
con.Open();
cmd1.Parameters.AddWithValue("@Item_ID", query);
Int32 max = Convert.ToInt32(cmd1.ExecuteScalar());
SqlCommand cmd3 = new SqlCommand("SELECT user_id FROM Bid WHERE(Bid_price =(SELECT MAX(Bid_price) AS Expr1 FROM Bid AS BID_1 WHERE(item_id = @Item_ID)))", con);
cmd3.Parameters.AddWithValue("@Item_ID", query);
Int32 winner = Convert.ToInt32(cmd3.ExecuteScalar());
SqlCommand cmd4 = new SqlCommand("SELECT name FROM items WHERE ([email protected]_ID)",con);
cmd4.Parameters.AddWithValue("Item_ID", query);
string product_name = Convert.ToString(cmd4.ExecuteScalar());
GeneratePDF.create_pdf(product_name, Convert.ToDecimal(max).ToString("c"), DateTime.Now.ToString());
SqlCommand cmd = new SqlCommand("INSERT INTO Winners VALUES(@item_id, @user_id,@win_price,@win_date)");
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@item_id", query);
cmd.Parameters.AddWithValue("@user_id", winner);
cmd.Parameters.AddWithValue("@win_price", max);
cmd.Parameters.AddWithValue("@win_date", DateTime.Now);
cmd.Connection = con;
cmd.ExecuteNonQuery();
con.Close();
}