我正在尝试将产品添加到购物车,但它会返回以下内容:
更新条目时发生错误。有关详细信息,请参阅内部异常。
内部异常:System.Data.SqlServerCe.SqlCeException(0x80004005): 无法将重复值插入唯一索引。 [表名 = Cart,Constraint name = PK_ Cart _0000000000000997]在System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)at at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommandText(IntPtr的&安培; pCursor,布尔& isBaseTableCursor)at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(的CommandBehavior behavior,String方法,ResultSetOptions选项)at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()at System.Data.SqlServerCe.SqlCeMultiCommand.ExecuteNonQuery()at System.Data.Mapping.Update.Internal.DynamicUpdateCommand.Execute(UpdateTranslator 翻译器,EntityConnection连接,字典
2 identifierValues, List
1 generatedValues)at System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager,IEntityAdapter适配器)堆栈跟踪 System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager,IEntityAdapter适配器)at System.Data.EntityClient.EntityAdapter.Update(IEntityStateManager entityCache) System.Data.Objects.ObjectContext.SaveChanges(SaveOptions选项)at System.Data.Objects.ObjectContext.SaveChanges()at JTS.Security.Identity.Push.ToCart(Int32 userId,String partNumber, String productDescription,Int32数量,十进制价格,十进制 lineTotal,String orderId,DateTime dateTime,Boolean isBoxed)in c:\ Users \ Jase \ Documents \ Visual Studio 2012 \ WebSites \ One \ App_Code \ JTS.cs:第251行
事情是,我没有任何唯一索引。我甚至试图删除所有主键(只是为了看看是否会改变任何东西) - 它没有。
代码:
public bool ToCart(int userId,
string partNumber,
string productDescription,
int quantity,
decimal price,
decimal lineTotal,
string orderId,
DateTime dateTime,
bool isBoxed)
{
bool addedToCart = false;
try
{
Cart cart = new Cart()
{
UserId = userId,
PartNumber = partNumber,
Description = productDescription,
Quantity = quantity,
Price = price,
LineTotal = lineTotal,
OrderId = orderId,
OrderDate = dateTime,
IsBoxed = isBoxed
};
database.AddToCarts(cart);
database.SaveChanges();
addedToCart = true;
}
catch (Exception exception)
{
addedToCart = false;
//Response(exception.Message);
addToCartExceptionDetails = exception.Message +
Environment.NewLine + Environment.NewLine + "Inner exception" +
exception.InnerException +
Environment.NewLine + Environment.NewLine + "Stack trace" +
exception.StackTrace;
}
return addedToCart;
}
此外,如果我创建一个新订单(创建一个新订单ID),它将添加一个项目到购物车。但是,在现有的OrderId下,它永远不会在购物车中添加任何超过1个商品!
我做错了什么?为什么这不起作用?
表定义Column Name Data Type Length Allow Nulls Unique Primary Key
UserId int 4 Yes No No
OrderId nvarchar 1000 No No Yes