//根据起始日期，截止日期和参数搜索数据库
public DataSet search(DbArgs args)
{
string queryArgs = "日期";
bool[] tmp = { args.openingPrice, args.closingPrice, args.maxPrice, args.minPrice };
string[] tmpStr = { "开盘价", "收盘价", "最高价", "最低价" };
for (int i = 0; i < tmp.Length; i++)
{
if (tmp[i])
{
queryArgs += ", " + tmpStr[i];
}
}
string queryStr = "select " + queryArgs + " from stock where 日期 >= '" + args.beginDate.ToShortDateString()
+ "' and 日期 <= '" + args.endDate.ToShortDateString() + "'";
using (var connection = openConnection())
{
SqlCommand cmd = connection.CreateCommand();
cmd.CommandText = queryStr;
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;
DataSet ds = new DataSet();
da.Fill(ds);
return(ds);
}
}
//根据起始日期，截止日期和参数搜索数据库
public DataSet search(DbArgs args)
{
try
{
return(dal.search(args));
}
catch
{
return(null);
}
}