如何在运行时使用ASP.NET Core中的密码获取连接字符串

Question

Here i am using appsettings.json file for connection string. I got connection string in runtime without password.

Example:

((MySql.Data.MySqlClient.MySqlConnection)DataContext.Database.GetDbConnection()).ConnectionString

Please help to get password in runtime.

Thank in advance.

Answer 1

You should try to get the connection string from Configuration, not from a DbConnection . For example, if appsettings.json contains the following, you can get the connection string via Configuration.GetConnectionString("mydb") .

{
  "ConnectionStrings": {
    "mydb": "server=DBSERVER;user=myuser;password=pwd;database=DB"
  }
}

That said, if you do have a DbConnection (or MySqlConnection ) object, you can get the password from the MySqlConnection.ConnectionString property if one or both of the following are true:

• The connection has never been opened.
• The original connection string contains PersistSecurityInfo=true; . (For more information on this, see the documentation at https://mysqlconnector.net/connection-options/ .)

If you're able to modify the original connection string your application is using, you can add the PersistSecurityInfo=true flag. Otherwise, you will need to get an unopened database connection in order to retrieve the full connection string, including the password.

Answer 2

This is by design, for security reasons. From MSDN :

The ConnectionString is similar to an OLE DB connection string, but is not identical. Unlike OLE DB or ADO, the connection string that is returned is the same as the user-set ConnectionString, minus security information if the Persist Security Info value is set to false (default). The .NET Framework Data Provider for SQL Server does not persist or return the password in a connection string unless you set Persist Security Info to true.

So, try to add Persist Security Info=true; in your connection string.