今天把silverlight 升级到5,ADO.ENT EF也用NUGet升级到5.结果发现5下的EF默认没有4的那种分部方法了。
当然你可以把生成器的属性里面,生成代码的属性替换为default,默认为Note。也可以跟4版本一样有分部方法。
但我发现EF5下面更智能,。更好用。EF的链接字符串有相关的类
EntityConnection
可以操作了。
请参看MSDN:
http://msdn.microsoft.com/en-us/library/system.data.entityclient.entityconnection.connectionstring.aspx
这样动态改变数据库就可以变得更灵活。
只要自定义一个方法,然后返回字符串给EntityConnection链接即可
// Specify the provider name, server and database.
string providerName = "System.Data.SqlClient";
string serverName = ".";
string databaseName = "AdventureWorks"; // Initialize the connection string builder for the
// underlying provider.
SqlConnectionStringBuilder sqlBuilder =
new SqlConnectionStringBuilder(); // Set the properties for the data source.
sqlBuilder.DataSource = serverName;
sqlBuilder.InitialCatalog = databaseName;
sqlBuilder.IntegratedSecurity = true; // Build the SqlConnection connection string.
string providerString = sqlBuilder.ToString(); // Initialize the EntityConnectionStringBuilder.
EntityConnectionStringBuilder entityBuilder =
new EntityConnectionStringBuilder(); //Set the provider name.
entityBuilder.Provider = providerName; // Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString; // Set the Metadata location.
entityBuilder.Metadata = @"res://*/AdventureWorksModel.csdl|
res://*/AdventureWorksModel.ssdl|
res://*/AdventureWorksModel.msl";
Console.WriteLine(entityBuilder.ToString());