Linq to SQL未将数据插入数据库 [英] Linq to SQL not inserting data onto the DB
问题描述
我这里的行为有些怪异，我正在互联网和SO上浏览，但没有找到回应.
I have a little / weird behaviour here and Im looking over internet and SO and I didn't find a response.
我必须承认这是我第一次使用数据库，我知道如何将它们与SQL一起使用，但从未真正使用过.
I have to admit that this is my first time using databases, I know how to use them with SQL but never used it actually.
无论如何，我的应用程序插入数据时遇到问题，我只是创建了一个非常简单的项目来进行测试，但还没有解决方案.
Anyway, I have a problem with my app inserting data, I just created a very simple project for testing that and no solution yet.
我有一个带有Sql Server的示例数据库
I have an example database with Sql Server
Id-int(身份主键) 名称-nchar(10)(不为null)
Id - int (identity primary key) Name - nchar(10) (not null)
该表称为人"，简称为饼图.
The table is called "Person", simple as pie.
我有这个:
static void Main(string[] args)
{
var db = new ExampleDBDataContext {Log = Console.Out};
var jesus = new Person {Name = "Jesus"};
db.Persons.InsertOnSubmit(jesus);
db.SubmitChanges();
var query = from person in db.Persons select person;
foreach (var p in query)
{
Console.WriteLine(p.Name);
}
}
如您所见，没有其他事物.
As you can see, nothing extrange.
它在控制台上显示了耶稣.但是，如果您看到表数据，则没有数据，只是空的.我评论了对象的创建和插入，并且foreach不会打印任何内容(正常情况下，数据库中没有数据)
It show Jesus in the console. But if you see the table data, there is no data, just empty. I comment the object creation and insertion and the foreach doesn't print a thing (normal, there is no data in the database)
奇怪的是，我在数据库中手动创建了一行，并且Id是2而不是1(Linq确实在玩数据库，但没有创建行吗?)
The weird thing is that I created a row in the database manually and the Id was 2 and no 1 (Was the linq really playing with the database but it didn't create the row?)
有日志:
插入[dbo].人
INSERT INTO [dbo].Person
VALUES(@ p0)
VALUES (@p0)
SELECT CONVERT(Int，SCOPE_IDENTITY())AS [value]
SELECT CONVERT(Int,SCOPE_IDENTITY()) AS [value]
-@ p0:输入NChar(大小= 10；精度= 0；比例= 0)[耶稣]
-- @p0: Input NChar (Size = 10; Prec = 0; Scale = 0) [Jesus]
-上下文:SqlProvider(Sql2005)模型:AttributedMetaModel构建:3.5.30729.4926
-- Context: SqlProvider(Sql2005) Model: AttributedMetaModel Build: 3.5.30729.4926
选择[t0].[Id]，[t0].[名称] 来自[dbo].[人] AS [t0]
SELECT [t0].[Id], [t0].[Name] FROM [dbo].[Person] AS [t0]
-上下文:SqlProvider(Sql2005)模型:AttributedMetaModel构建:3.5.30729.4926
-- Context: SqlProvider(Sql2005) Model: AttributedMetaModel Build: 3.5.30729.4926
我真的很困惑，所有的博客/书籍都使用这种片段将元素插入数据库.
I am really confused, All the blogs / books use this kind of snippet to insert an element to a database.
感谢您的帮助.
推荐答案
首先；您是否有一个TransactionScope跨越了这个范围，您还没有提交?
First; do you have a TransactionScope that spans this, that you haven't committed.
但是，更客气的是:这是您要与系统(而不是单独的数据库服务器)一起部署的数据库文件吗?如果是这样，则每次您单击"build"等时，它将版本从解决方案文件夹复制到生成输出中(bin/debug或bin/release).
However, more liktely: is this a database file that you are deploying with the system (rather than a separate database server)? If so, every time you hit "build" etc, it copies the version from your solution folder into the build output (bin/debug or bin/release).
查看构建输出副本；查看那个是否已更新.
Look in the build output copy; see if that has been updated.
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