如何创建模型容器对象
我问了这个问题不久前，但没有人能够解决这个问题。所以我做了一些更多的测试，并确定问题存在于我的代码中。所以我的问题是，我做错了什么？
所以我创建了模型容器：
Private mdbContext As PFModelContainer
Private mdbTransactions As Object
在我这样做之前：
Private mdbContext As New PFModelContainer
Private mdbTransactions As mdbContext.Transactions
认为我可能做错了什么，我将其更改为第一种方式，然后我这样做：
Public Sub New()
mdbContext = New PFModelContainer
mdbTransactions = mdbContext.Transactions
End Sub
一旦我点击 mdbContext = New PFModelContainer 它需要我转到 PFModel.Designer.vb，它执行以下步骤：
Public Sub New()
MyBase.New("name=PFModelContainer", "PFModelContainer")
此时它终止代码的执行。我在这里做错了什么吗？
这是它在“立即”窗口上给我的错误：
发生了“System.ArgumentException”类型的第一次机会异常 在System.Data.Entity.dll中
我可以采取什么措施来消除此错误？我尝试删除该项目并使用旧的 .edmx 模型重新创建它，该模型是我在 Mozy 运行时下载的。在我更改 .edmx 模型并更新它后，它停止工作（据我所知）。也许我在另一个项目中也做了其他事情，但我不记得任何事情。
这是 app.config 中的内容：
<connectionStrings>
<add name="PFModelContainer" connectionString="metadata=res://*/PFModel.csdl|res://*/PFModel.ssdl|res://*/PFModel.msl;provider=System.Data.SqlServerCe.3.5;provider connection string="Data Source=|DataDirectory|\bin\Debug\MyDatabase#1.sdf"" providerName="System.Data.EntityClient" />
</connectionStrings>
我应该在某处引用 System.Data.EntityClient 和 System.Data.SqlServerCe.3.5 吗？
EDMX 属性实体容器名称 为PFModelContainer，命名空间 为PFModel。
I asked this question a while back but no one was a able to tackle it. So I did some more testing and determined it is in my code that the problem exists. So my question is, what am I doing wrong?
So I create the model container:
Private mdbContext As PFModelContainer
Private mdbTransactions As Object
Before I did it this way:
Private mdbContext As New PFModelContainer
Private mdbTransactions As mdbContext.Transactions
Thinking maybe I was doing something wrong I changed it over to the first way, then I do:
Public Sub New()
mdbContext = New PFModelContainer
mdbTransactions = mdbContext.Transactions
End Sub
Once I hit mdbContext = New PFModelContainer it takes me over to the PFModel.Designer.vb Where it steps through the following:
Public Sub New()
MyBase.New("name=PFModelContainer", "PFModelContainer")
At which point it terminates execution of the code. Am I doing something wrong here?
This is the error it gives me on the Immediate window:
A first chance exception of type 'System.ArgumentException' occurred
in System.Data.Entity.dll
Is there something I can do to make this error go away? I tried deleting the project and recreating it with my old .edmx model that I downloaded from Mozy from when it used to work. It stopped working (as far as I can tell) after I changed the .edmx model and updated it. Maybe I did something else in the other project too, but I'm not recalling anything.
This is what is in the app.config:
<connectionStrings>
<add name="PFModelContainer" connectionString="metadata=res://*/PFModel.csdl|res://*/PFModel.ssdl|res://*/PFModel.msl;provider=System.Data.SqlServerCe.3.5;provider connection string="Data Source=|DataDirectory|\bin\Debug\MyDatabase#1.sdf"" providerName="System.Data.EntityClient" />
</connectionStrings>
Should I be referencing System.Data.EntityClient and System.Data.SqlServerCe.3.5 somewhere?
The EDMX property Entity Container Name is PFModelContainer and the Namespace is PFModel.
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好的，事实证明我需要通过右键单击 edmx 模型并按来更新 tt 模型
然后
我想我以前做过，但我不记得做过。
OK, it turns out that I need to update the tt model by right clicking in the edmx model and pressing
Then
I suppose I did it before but I don't remember doing it.