/// <summary>
/// 更新一条数据
/// </summary>
public bool Update(book_shop.Model.OrderBookModel model)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("update OrderBook set ");
strSql.Append("OrderID=@OrderID,");
strSql.Append("BookID=@BookID,");
strSql.Append("Quantity=@Quantity,");
strSql.Append("UnitPrice=@UnitPrice");
strSql.Append(" where Id=@Id");
SqlParameter[] parameters =
{
new SqlParameter("@OrderID", SqlDbType.NVarChar, 50),
new SqlParameter("@BookID", SqlDbType.Int, 4),
new SqlParameter("@Quantity", SqlDbType.Int, 4),
new SqlParameter("@UnitPrice", SqlDbType.Decimal, 9),
new SqlParameter("@Id", SqlDbType.Int, 4)
};
parameters[0].Value = model.OrderID;
parameters[1].Value = model.BookID;
parameters[2].Value = model.Quantity;
parameters[3].Value = model.UnitPrice;
parameters[4].Value = model.Id;
int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
if (rows > 0)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// 得到一个对象实体
/// </summary>
public book_shop.Model.OrderBookModel DataRowToModel(DataRow row)
{
book_shop.Model.OrderBookModel model = new book_shop.Model.OrderBookModel();
if (row != null)
{
if (row["Id"] != null && row["Id"].ToString() != "")
{
model.Id = int.Parse(row["Id"].ToString());
}
if (row["OrderID"] != null)
{
model.OrderID = row["OrderID"].ToString();
}
if (row["BookID"] != null && row["BookID"].ToString() != "")
{
model.BookID = int.Parse(row["BookID"].ToString());
}
if (row["Quantity"] != null && row["Quantity"].ToString() != "")
{
model.Quantity = int.Parse(row["Quantity"].ToString());
}
if (row["UnitPrice"] != null && row["UnitPrice"].ToString() != "")
{
model.UnitPrice = decimal.Parse(row["UnitPrice"].ToString());
}
}
return(model);
}
/// <summary>
/// 增加一条数据
/// </summary>
public int Add(book_shop.Model.OrderBookModel model)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("insert into OrderBook(");
strSql.Append("OrderID,BookID,Quantity,UnitPrice)");
strSql.Append(" values (");
strSql.Append("@OrderID,@BookID,@Quantity,@UnitPrice)");
strSql.Append(";select @@IDENTITY");
SqlParameter[] parameters =
{
new SqlParameter("@OrderID", SqlDbType.NVarChar, 50),
new SqlParameter("@BookID", SqlDbType.Int, 4),
new SqlParameter("@Quantity", SqlDbType.Int, 4),
new SqlParameter("@UnitPrice", SqlDbType.Decimal, 9)
};
parameters[0].Value = model.OrderID;
parameters[1].Value = model.BookID;
parameters[2].Value = model.Quantity;
parameters[3].Value = model.UnitPrice;
object obj = DbHelperSQL.GetSingle(strSql.ToString(), parameters);
if (obj == null)
{
return(0);
}
else
{
return(Convert.ToInt32(obj));
}
}
/// <summary>
/// 得到一个对象实体
/// </summary>
public book_shop.Model.OrderBookModel GetModel(int Id)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("select top 1 Id,OrderID,BookID,Quantity,UnitPrice from OrderBook ");
strSql.Append(" where Id=@Id");
SqlParameter[] parameters =
{
new SqlParameter("@Id", SqlDbType.Int, 4)
};
parameters[0].Value = Id;
book_shop.Model.OrderBookModel model = new book_shop.Model.OrderBookModel();
DataSet ds = DbHelperSQL.Query(strSql.ToString(), parameters);
if (ds.Tables[0].Rows.Count > 0)
{
return(DataRowToModel(ds.Tables[0].Rows[0]));
}
else
{
return(null);
}
}
