1.EFDbContext”不包含必需的 providerName 特性:
<connectionStrings>
<add
name="EFDbContext"
providerName="System.Data.SqlClient"
connectionString="Data Source=(localdb)\v11.0;Initial Catalog=SportsStore;Integrated Security=True;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False"/>
</connectionStrings>
2.当的数据上下文类的名称为连接字符串中,设置的name的名字相同时,不必特意指定连接字符串。但是,如果字符串名称(name)和数据上下文类的名称不同时,需要指定字符串的名字
eg:
2.1
<connectionStrings>
<add name="EFDbContext" .../>
</connectionStrings>
public class EFDbContext : DbContext
{
public DbSet<Product> Products { get; set; }
}
2.2
<connectionStrings>
<add name="EFDbConnStr" .../>
</connectionStrings>
public class EFDbContext : DbContext
{
public EFDbContext()
: base("EFDbConnectStr")
{
}
public DbSet<Product> Products { get; set; }
}