实体框架实体连接元数据问题

Question

我们正在尝试动态构建一个EntityConnection，以便不同的用户连接到在运行时确定的不同的数据库。为了做到这一点，我们正在测试这里找到的代码：http://msdn.microsoft.com/en-us/library/bb738533.aspx。我们下面实现了这个：

' Specify the provider name, server and database. 
Dim providerName As String = "System.Data.SqlClient" 
Dim serverName As String = "OurDBServerName" 
Dim databaseName As String = "OurDBName" 

' Initialize the connection string builder for the 
' underlying provider. 
Dim sqlBuilder As New SqlConnectionStringBuilder 

' Set the properties for the data source. 
sqlBuilder.DataSource = serverName 
sqlBuilder.InitialCatalog = databaseName 
sqlBuilder.IntegratedSecurity = False 
sqlBuilder.UserID = "OurAppUserName" 
sqlBuilder.Password = "OurPassword" 

' Build the SqlConnection connection string. 
Dim providerString As String = sqlBuilder.ToString 

' Initialize the EntityConnectionStringBuilder. 
Dim entityBuilder As New EntityConnectionStringBuilder 

'Set the provider name. 
entityBuilder.Provider = providerName 

' Set the provider-specific connection string. 
entityBuilder.ProviderConnectionString = providerString 

' Set the Metadata location to the current directory. 
entityBuilder.Metadata = "res://*/NotaModel.csdl|" & _ 
         "res://*/NotaModel.ssdl|" & _ 
         "res://*/NotaModel.msl" 

Console.WriteLine(entityBuilder.ToString) 

Using conn As EntityConnection = New EntityConnection(entityBuilder.ToString) 
    conn.Open() 
    Console.WriteLine("Just testing the connection.") 
    conn.Close() 
End Using 

当conn.Open（）运行时抛出一个错误：“无法加载指定的元数据资源”它似乎表明一个或多个“res：// * ...”引用是错误的。我已经确认该项目确实包含这些文件（位于bin/debug文件夹下）。我们在这里想念什么 - 有什么想法？

谢谢

Answer 1

是的，res://部分是错误的。查看Reflector（程序集内）中的资源名称，而不是本地文件系统中的资源名称，以查看它们应该是什么。