// 从数据库获取的是旧数据，不一定是最新的,如果数据库的内容少于请求，返回所有数据
// 判断list长度是否为0来判断是否获取成功, path是数据文件夹路径，如 "C:\data" 用反斜杠
public static List <HistoryStockData> getHistoryDataFromFile(string stockCode, int dayNumber, string path)
{
List <HistoryStockData> data = new List <HistoryStockData>();
using (StreamReader sr = new StreamReader(path + String.Format("\\{0}.csv", stockCode), Encoding.UTF8))
{
string sh; int i = 0;
string[] s; HistoryStockData stockData;
while (i < dayNumber && (sh = sr.ReadLine()) != null)
{
s = sh.Split(',');
stockData = new HistoryStockData();
stockData.date = s[0];
stockData.openPrice = double.Parse(s[1]);
stockData.closePrice = double.Parse(s[3]);
stockData.highestPrice = double.Parse(s[4]);
stockData.lowestPrice = double.Parse(s[2]);
stockData.volume = int.Parse(s[5]);
data.Add(stockData);
i++;
}
}
return(data);
}
// 判断list长度是否为0来判断是否获取成功,path是数据文件夹路径，如 "C:\data" 严格按照windows资源管理器来
public static List <HistoryStockData> getHistoryDataAndSaveToFile(string stockCode, int dayNumber, string path)
{
stockCode = stockCode.ToLower();
List <HistoryStockData> data = new List <HistoryStockData>();
string url = "http://table.finance.yahoo.com/table.csv?s=" + changeCode(stockCode);
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
request.Headers.Add("apikey", "50d2a55d48e3d9d157d0df783cc01ce2");
System.Net.HttpWebResponse response;
try
{
response = (System.Net.HttpWebResponse)request.GetResponse();
}
catch (Exception ex)
{
return(new List <HistoryStockData>());
}
StreamReader Reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
Reader.ReadLine();
string[] s; HistoryStockData stockData;
for (int i = 0; i < dayNumber; i++)
{
s = Reader.ReadLine().Split(',');
stockData = new HistoryStockData();
stockData.date = s[0];
stockData.openPrice = double.Parse(s[1]);
stockData.closePrice = double.Parse(s[3]);
stockData.highestPrice = double.Parse(s[4]);
stockData.lowestPrice = double.Parse(s[2]);
stockData.volume = int.Parse(s[5]);
data.Add(stockData);
}
reserveToFile(stockCode, data, path);
return(data);
}
// 从数据库获取的是旧数据，不一定是最新的,如果数据库的内容少于请求，返回所有数据
// 判断list长度是否为0来判断是否获取成功
public static List <HistoryStockData> getHistoryDataFormDatabase(string stockCode, int dayNumber)
{
string mysql_str = "server=localhost; User ID=root; Password=123; database=stock_data";
MySqlConnection con = new MySqlConnection(mysql_str);
con.Open();
string sql;
sql = String.Format("select * from {0}", stockCode);
MySqlDataAdapter da = new MySqlDataAdapter(sql, con);
DataSet ds = new DataSet();
da.Fill(ds);
DataTable dt = ds.Tables[0];
List <HistoryStockData> data = new List <HistoryStockData>();
HistoryStockData stockData;
if (dt.Rows.Count < dayNumber)
{
dayNumber = dt.Rows.Count;
}
for (int i = dayNumber - 1; i >= 0; i--)
{
DataRow dr = dt.Rows[i];
stockData = new HistoryStockData();
stockData.date = dr[0].ToString();
stockData.openPrice = double.Parse(dr[1].ToString());
stockData.closePrice = double.Parse(dr[2].ToString());
stockData.highestPrice = double.Parse(dr[3].ToString());
stockData.lowestPrice = double.Parse(dr[4].ToString());
stockData.volume = int.Parse(dr[5].ToString());
data.Add(stockData);
}
con.Close();
return(data);
}