Question

我在下面提到的代码中遇到了问题。它给我一个论点。 IRepository

public interface IUserRepository
{
    List GetAll(); // Error shows me here then i change this to List<User> GetAll(); but still getting the error.
}

存储库

public class UserRepository : IUserRepository
{
    private IDbConnection _db = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString);
    public List<User> GetAll()
    {
        return this._db.Query<User>("SELECT * FROM Users").ToList();
    }
}

Answer 1

你应该尝试：

public interface IUserRepository<T>
{
    List<T> GetAll(); 
}

然后：

public class UserRepository : IUserRepository<User>
{
    private IDbConnection _db = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString);
    public List<User> GetAll()
    {
        return this._db.Query<User>("SELECT * FROM Users").ToList();
    }
}

使用泛型类型＆＃39; System.Collections.Generic.List <t>＆＃39;在IRepository中需要1个类型参数

1 个答案: