在实体框架核心中调用存储过程，参数不以@或＃开头

Question

I'm writing a data layer based on ef-core 2.2, which need to be compatible with SqlServer and Oracle.

When calling a SP with complex data format (like binary) or output parameters, a SqlParameter instance need to be created. The name of the parameter is started with @ or #, based on the type of the database chosen.

How to avoid use the prefix @ or #, for database compatibility?

Thanks.

Answer 1

Unfortunately in sql you have to use @ but in oracle you can remove it. Working with parameter placeholders The syntax for parameter placeholders depends on the data source. The .NET Framework data providers handle naming and specifying parameters and parameter placeholders differently. This syntax is customized to a specific data source, as described in the following table.

System.Data.SqlClient   Uses named parameters in the format @parametername.

System.Data.OleDb   Uses positional parameter markers indicated by a question mark (?).

System.Data.Odbc    Uses positional parameter markers indicated by a question mark (?).

System.Data.OracleClient    Uses named parameters in the format :parmname (or parmname).

You can find total description from this link

https://docs.microsoft.com/en-us/dotnet/framework/data/adonet/configuring-parameters-and-parameter-data-types?view=netframework-4.8#working-with-parameter-placeholders