因此，如果您使用实体框架，您首先要创建一个数据库上下文： https://learn.microsoft.com/en-us/ef/ef6/fundamentals/working-with-dbcontext。然后，您想要创建某种可以获取数据的存储库：
return await dbContext.test .Where(test => test.X == X) .Where(test => test.Y == Y) .Where(test => test.Z == Z) .FirstOrDefault();
但是请阅读并遵循 https://learn.microsoft.com/en-us/ef/ef6/ 应该会有很大帮助。
So if you are using entity framework you first want to make a db context: https://learn.microsoft.com/en-us/ef/ef6/fundamentals/working-with-dbcontext.Then you want to make some sort of repository where you can get your data:
But reading and following the fundamentals on https://learn.microsoft.com/en-us/ef/ef6/ should be a big help.
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因此，如果您使用实体框架，您首先要创建一个数据库上下文： https://learn.microsoft.com/en-us/ef/ef6/fundamentals/working-with-dbcontext。
然后，您想要创建某种可以获取数据的存储库：
但是请阅读并遵循 https://learn.microsoft.com/en-us/ef/ef6/ 应该会有很大帮助。
So if you are using entity framework you first want to make a db context: https://learn.microsoft.com/en-us/ef/ef6/fundamentals/working-with-dbcontext.
Then you want to make some sort of repository where you can get your data:
But reading and following the fundamentals on https://learn.microsoft.com/en-us/ef/ef6/ should be a big help.