标签：style io ar os sp for on 文件 数据
1，下载官方的DLL文件 System.Data.SQLite.dll
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2，修改微软官方的SqlHelper，打造SQLiteHelper，改造方法很简单，批量替换方式
SqlConnection=》SQLiteConnection
SqlCommand=》SQLiteCommand
SqlParameter=》SQLiteParameter
SqlDataReader=》SQLiteDataReader
SqlTransaction=》SQLiteTransaction
网上的SQLite helper 改造的烂七八糟，我们需要纯净版。
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SQLiteHelper DB路径
public static readonly string ConnectionString = string.Format("DataSource={0}", Application.StartupPath + "/fulu");
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3, SQLite工具 sqlite database browser(个人感觉比sqlite expert 好用)，主要作用是创建数据库，创建表，把SQL 语句复制进去，运行的时候会自动转成sqlite 语句。
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4，操作类（和SQL一模一样）
public class OrderManage
{
public void add(long tid, string status, string seller_nick, string buyer_nick, DateTime created, DateTime pay_time, long num_iid, string title, int num, decimal price, decimal payment, string receiver_address)
{
string sql = "insert into TradeOrder(tid,status,seller_nick,buyer_nick,created,pay_time,num_iid,title,num,price,payment,receiver_address) values(@tid,@status,@seller_nick,@buyer_nick,@created,@pay_time,@num_iid,@title,@num,@price,@payment,@receiver_address)";
SQLiteParameter[] parms =
{
new SQLiteParameter("@tid",tid),
new SQLiteParameter("@status",status),
new SQLiteParameter("@seller_nick",seller_nick),
new SQLiteParameter("@buyer_nick",buyer_nick),
new SQLiteParameter("@created",created),
new SQLiteParameter("@pay_time",pay_time),
new SQLiteParameter("@num_iid",num_iid),
new SQLiteParameter("@title",title),
new SQLiteParameter("@num",num),
new SQLiteParameter("@price",price),
new SQLiteParameter("@payment",payment),
new SQLiteParameter("@receiver_address",receiver_address)
};
int r = SQLiteHelper.ExecuteNonQuery(SQLiteHelper.ConnectionString, CommandType.Text, sql, parms);
}
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public void update(long tid, string status, DateTime end_time)
{
string sql = "update TradeOrder set status=@status,end_time=@end_time where tid=@tid";
SQLiteParameter[] parms =
{
new SQLiteParameter("@tid",tid),
new SQLiteParameter("@status",status),
new SQLiteParameter("@end_time",end_time)
};
int r = SQLiteHelper.ExecuteNonQuery(SQLiteHelper.ConnectionString, CommandType.Text, sql, parms);
}
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public void delete(long tid)
{
string sql = "delete from TradeOrder where tid=@tid";
SQLiteParameter[] parms =
{
new SQLiteParameter("@tid",tid)
};
int r = SQLiteHelper.ExecuteNonQuery(SQLiteHelper.ConnectionString, CommandType.Text, sql, parms);
}
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public DataTable select(long tid)
{
string sql = "select * from TradeOrder where tid=@tid";
SQLiteParameter[] parms =
{
new SQLiteParameter("@tid",tid)
};
DataSet ds = SQLiteHelper.ExecuteDataset(SQLiteHelper.ConnectionString, CommandType.Text, sql, parms);
return ds.Tables[0];
}
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public string select2(long tid)
{
string sql = "select status from TradeOrder where tid=@tid";
SQLiteParameter[] parms =
{
new SQLiteParameter("@tid",tid)
};
object obj = SQLiteHelper.ExecuteScalar(SQLiteHelper.ConnectionString, CommandType.Text, sql, parms);
if (obj != null)
{
return obj.ToString();
}
return "";
}
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public void select3(DateTime created, ref List<TradeOrder> orders)
{
string sql = "select * from TradeOrder where created>@created";
SQLiteParameter[] parms =
{
new SQLiteParameter("@created",created)
};
using (SQLiteDataReader dr = SQLiteHelper.ExecuteReader(SQLiteHelper.ConnectionString, CommandType.Text, sql, parms))
{
while (dr.Read())
{
TradeOrder order = new TradeOrder();
order.tid = long.Parse(dr["tid"].ToString());
order.status = dr["status"].ToString();
order.seller_nick = dr["seller_nick"].ToString();
order.buyer_nick = dr["buyer_nick"].ToString();
order.seller_nick = dr["seller_nick"].ToString();
order.created = string.IsNullOrEmpty(dr["created"].ToString()) ? DateTime.MinValue : DateTime.Parse(dr["created"].ToString());
order.pay_time = dr["pay_time"] == null ? DateTime.MinValue : DateTime.Parse(dr["pay_time"].ToString());
order.end_time = string.IsNullOrEmpty(dr["end_time"].ToString()) ? DateTime.MinValue : DateTime.Parse(dr["end_time"].ToString());
order.num_iid = long.Parse(dr["num_iid"].ToString());
order.num = int.Parse(dr["num"].ToString());
order.price = decimal.Parse(dr["price"].ToString());
order.payment = decimal.Parse(dr["payment"].ToString());
order.receiver_address = dr["receiver_address"].ToString();
orders.Add(order);
}
}
}
}
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5，业务逻辑测试
OrderManage orderMng = new OrderManage();
//add
long tid = new Random().Next(1, 100);
orderMng.add(tid, "未处理", "一福二碌", "top15from", DateTime.Now, DateTime.Now, long.Parse("15"), "CF", 1, decimal.Parse("0.95"), decimal.Parse("0.95"), "不需要收获地址");
tid = new Random().Next(1, 100);
orderMng.add(tid, "未处理", "一福二碌", "top20from", DateTime.Now, DateTime.Now, long.Parse("20"), "DNF", 2, decimal.Parse("0.95"), decimal.Parse("1.9"), "不需要收获地址");
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//select1
DataTable dt = orderMng.select(tid);
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//update
orderMng.update(tid, "完成", DateTime.Now);
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//select2
string status = orderMng.select2(tid);
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//delete
orderMng.delete(tid);
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//select3
List<TradeOrder> orders = new List<TradeOrder>();
orderMng.select3(DateTime.Now.AddHours(-1), ref orders);
标签：style io ar os sp for on 文件 数据
原文地址：http://www.cnblogs.com/top15from/p/4164592.html
