SQL 服务器与 Unity3D

Question

I want to use SQL Server with Unity. I add System.Data.dll to assets in Unity project but I get this error:

The type or namespace name 'SqlClient' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)

Then I added sqlclient.dll to the assets folder, but I still get:

The type name 'SqlConnection' could not be found in the namespace 'System.Data.SqlClient'. This type has been forwarded to assembly 'System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
Consider adding a reference to that assembly.

Please help me? What's wrong?

Answer 1

After some researches, looks like there are much easy way to import sql in new versions of Unity:

1. Download new System.Data.SqlClient from nuget. For example, use in terminal nuget install System.Data.SqlClient -Version 4.7.0 -OutputDirectory <some temp dir>
2. Open unity build settings, find Api Compatibility Level . It will be .NET 4.x or .NET Standard 2.0
3. Create Plugins directory in folder
4. Copy dll from <some temp dir>/lib/<api level>/System.Data.SqlClient.dll to Plugins directory.
5. That all, you can use sql:)

For example, in my case there are .NET Standard 2.0 compat. level and <some temp dir>/lib/netstandard2.0/System.Data.SqlClient.dll library.