Entity Framework Core Database 首先不render Model of Stored Procedure？

Question

数据库

I have Stored Procedure name GetAllCustomer

我在 EntityFramework 6x 和项目 ASP.NET MVC5 中有存储过程。

我正在调用 db.GetAllCustomer.ToList();

但在 EntityFramework Core 中它不呈现 DbSet，我需要手动创建它。它不能使用 EF 6x。

这是我的作品图片:

有没有像EF 6x一样简单的调用存储过程的方法？？

Answer 1

您可以在上下文中使用自定义 ExecuteQuery 进行任何用途，包括存储过程。

public List<T> ExecuteQuery<T>(string query) where T : class, new()
{
        using (var command = Context.Database.GetDbConnection().CreateCommand())
        {
            command.CommandText = query;
            command.CommandType = CommandType.Text;

            Context.Database.OpenConnection();
            List<T> result;

            using (var reader = command.ExecuteReader())
            {
                result = new List<T>();
                var columns = new T().GetType().GetProperties().ToList();

                while (reader.Read())
                {
                    var obj = new T();

                    for (var i = 0; i < reader.FieldCount; i++)
                    {
                        var name = reader.GetName(i);
                        var prop = columns.FirstOrDefault(a => a.Name.ToLower().Equals(name.ToLower()));

                        if (prop == null)
                            continue;

                        var val = reader.IsDBNull(i) ? null : reader[i];
                        prop.SetValue(obj, val, null);
                    }

                    result.Add(obj);
                }

                return result;
            }
        }
    }

用法：

db.ExecuteQuery<YOUR_MODEL_DEPEND_ON_RETURN_RESULT>("SELECT FIELDS FROM YOUR_TABLE_NAME")
db.ExecuteQuery<YOUR_MODEL_DEPEND_ON_RETURN_RESULT>("EXEC YOUR_SP_NAME")
db.ExecuteQuery<YOUR_MODEL_DEPEND_ON_RETURN_RESULT>("EXEC YOUR_SP_NAME @Id = 10")

为了减少错误、更轻松地创建查询字符串并更快地执行操作，我使用了其他几种方法，并将存储过程名称放在静态 class.

中

例如，我有这样的东西来获取客户名单：

    /// <param name="parameters">The model contains all SP parameters</param>
    public List<customerGetDto> Get(CustomerSpGetParameters parameters = null)
    {
        //StoredProcedures.Customer.Get Is "sp_GetAllCustomers"
        //CreateSqlQueryForSp creates a string with stored procedure name and parameters
        var query = _publicMethods.CreateSqlQueryForSp(StoredProcedures.Request.Get, parameters);
        //For example, query= "Exec sp_GetAllCustomers @active = 1,@level = 3,...."
        return _unitOfWork.ExecuteQuery<RequestGetDto>(query);
    }

Answer 2

EF Core Power Tools 可以为您映射存储过程，它不是 EF Core 的内置功能。

示例用户代码：

using (var db = new NorthwindContext())
{
        var procedures = new NorthwindContextProcedures(db);

        var orders = await procedures.CustOrderHist("ALFKI");
        foreach (var order in orders)
            Console.WriteLine($"{order.ProductName}: {order.Total}");

        var outOverallCount = new OutputParameter<int?>();
        var customers = await procedures.SP_GET_TOP_IDS(10, outOverallCount);
        Console.WriteLine($"Db contains {outOverallCount.Value} Customers.");
        foreach (var customer in customers)
            Console.WriteLine(customer.CustomerId);
}

在此处阅读更多内容：https://github.com/ErikEJ/EFCorePowerTools/wiki/Reverse-Engineering#sql-server-stored-procedures

Entity Framework Core Database 首先不render Model of Stored Procedure？

Entity Framework Core Database First not render Model of Stored Procedure?

c#

stored-procedures

database-first

entity-framework-core

asp.net-core-mvc

数据库

有没有像EF 6x一样简单的调用存储过程的方法？？