我正在开发一个使用asp.net c#和Mysql进行在线购物的项目。我正在使用Devart Linqconnect(LinqtoMysql)。我在mysql客户和客户addreesses中有两个表:
客户表
CustomerID Int
Customerhone varchar(20);
客户密码Varchar(20);
email varchar(20)
名字char(50)
姓氏(50)
username varshar(50)
Customer_Addresses
Customer_address_ID INT UNSIGNED NOT NULL AUTO_INCREMENT,
Customer_ID INT NOT NULL,
address1 CHAR(250),
address2 CHAR(250),
城市CHAR(20),
CHAR(20),
pincode VARCHAR(20),
PRIMARY KEY(Customer_address_ID),
FOREIGN KEY(Customer_ID)REFERENCES customers(Customer_ID)
当我使用LINQ to mysql注册客户时编写此代码:
using (ShoppingDataContext data = new ShoppingDataContext())
{
Customer NewCustomer = new Customer();
CustomerAddress newaddress = new CustomerAddress();
newaddress.CustomerID = NewCustomer.CustomerID;
NewCustomer.CustomerFirstname = TextBoxFirstName.Text;
NewCustomer.CustomerLastname = TextBoxLastname.Text;
NewCustomer.CustomerEmail = TextBoxEmail.Text;
NewCustomer.Username = TextBoxusername.Text;
NewCustomer.CustomerPassword = TextBoxPassword.Text;
newaddress.Address1 = TextBoxAddress1.Text;
newaddress.Address2 = TextBoxAddress2.Text;
newaddress.City = TextBoxCity.Text;
newaddress.State = TextBoxState.Text;
newaddress.Pincode = TextBoxPincode.Text;
System.Web.Security.Membership.CreateUser(TextBoxusername.Text, TextBoxPassword.Text);
data.Customers.InsertOnSubmit(NewCustomer);
PanelRegister.Visible = false;
ConfimPanel.Visible = true;
}
此代码是否可以将数据插入到两个表中。请帮忙。 customer_address表是否能够根据customerId作为外键检测到输入的客户地址是customer表..
我正在使用ajax工具包的模态弹出面板,并在面板中添加了注册和登录表..
我的注册小组:
提前致谢...
答案 0 :(得分:1)
您似乎必须先将记录插入Customer Table
,然后再插入Customer_Addresses
以使数据库引擎能够找到外键
答案 1 :(得分:1)
如果您查看自己代码中的一行,
data.Customers.InsertOnSubmit(NewCustomer);
这告诉您在单个表上调用InsertOnSubmit
和InsertAllOnSubmit
的故事。我自己没有尝试过,但你可以解决这个问题并制定自己的方法来为你做这件事。
尽管正如Pablo Lemurr所提到的那样,在引用外键之后,您需要先添加客户记录,然后再添加地址记录。
希望这有帮助。
答案 2 :(得分:1)
我强烈建议您按照以下方式组织代码:
using (ShoppingDataContext data = new ShoppingDataContext())
{
Customer newCustomer = new Customer()
{
CustomerFirstname = TextBoxFirstName.Text,
CustomerLastname = TextBoxLastname.Text,
CustomerEmail = TextBoxEmail.Text,
Username = TextBoxusername.Text,
CustomerPassword = TextBoxPassword.Text
};
//now I'd like to be proven wrong here, but I believe you need to insert
//and submit at this point
data.Customers.InsertOnSubmit(newCustomer);
data.SubmitChanges();
CustomerAddress newaddress = new CustomerAddress()
{
CustomerID = NewCustomer.CustomerID,
Address1 = TextBoxAddress1.Text,
Address2 = TextBoxAddress2.Text,
City = TextBoxCity.Text,
State = TextBoxState.Text,
Pincode = TextBoxPincode.Text,
};
//add new address to your customer and save
newCustomer.CustomerAddresses.Add(newAddress);
//it has been a while since I used linq2sql so you may need one of these:
//newCustomer.CustomerAddresses.InsertOnSubmit(newAddress);
//newCustomer.CustomerAddresses.Attach(newAddress);
//basically use intellisense to help you figure out the right one, you might
//have some trial and error here
data.SubmitChanges();
System.Web.Security.Membership.CreateUser(TextBoxusername.Text, TextBoxPassword.Text);
PanelRegister.Visible = false;
ConfimPanel.Visible = true;
}
另外,请注意insert和db.SubmitChanges()的移动位置。现在我不确定你是否可以一次使用一个SubmitChanges()或者如果你需要两个如此显示。我对你提供最新消息感兴趣。
您可以在此处查看简单的插入示例:
http://msdn.microsoft.com/en-us/library/bb386941.aspx
编辑:您可能希望将这一切包装在一个事务管理器中,以便它作为一个单元成功或失败
using(TransactionScope scope = new TransactionScope())
{
using(ShoppingDataContext data = new ShoppingDataContext())
{
//the rest of your code
}
}
只是一个想法。