Question

基本上我正在使用 NopCommerce 3.2 。我修改了存储过程，因此它可以返回与CategoryName详细信息关联的Prodcut，例如;

--return products
    SELECT TOP (@RowsToReturn)
        p.*, c.Name as CategoryName
    FROM
        #PageIndex [pi]
        INNER JOIN Product p with (NOLOCK) on p.Id = [pi].[ProductId]
        -- Custom INNER JOIN To Get CategoryName
        INNER JOIN Product_Category_Mapping pc ON pc.ProductId  = p.Id
        INNER JOIN Category c ON c.Id = pc.CategoryId
    WHERE
        [pi].IndexId > @PageLowerBound AND 
        [pi].IndexId < @PageUpperBound
    ORDER BY
        [pi].IndexId

正如您所见ResultSet，CategoryName已被检索; enter image description here
在我的代码中，我创建了一个带有ignor映射的自定义属性;

// Product.cs
public string CategoryName { get; set; }
// another mapping class i.e ProductMapp.cs
this.Ignore(p => p.CategoryName);

使用此代码（minimezed）检索实际的ResultSet;

        // some parameters sent by nopcommerce
        var pTotalRecords = _dataProvider.GetParameter();
        pTotalRecords.ParameterName = "TotalRecords";
        pTotalRecords.Direction = ParameterDirection.Output;
        pTotalRecords.DbType = DbType.Int32;
        .........
        //invoke stored procedure
        var products = _dbContext.ExecuteStoredProcedureList<Product>(
            "ProductLoadAllPaged",
            .............
            .............
            pTotalRecords);

方法（ExecuteStoredProcedureList）定义在这里;
注意：方法代码太长而无法粘贴，因此我尝试仅粘贴执行和映射代码

        //var connection = context.Connection;
        var connection = this.Database.Connection;
        //Don't close the connection after command execution


        //open the connection for use
        if (connection.State == ConnectionState.Closed)
            connection.Open();
        //create a command object
        using (var cmd = connection.CreateCommand())
        {
            //command to execute
            cmd.CommandText = commandText;
            cmd.CommandType = CommandType.StoredProcedure;

            // move parameters to command object
            if (parameters != null)
                foreach (var p in parameters)
                    cmd.Parameters.Add(p);

            //database call
            var reader = cmd.ExecuteReader();
            //return reader.DataReaderToObjectList<TEntity>();
            var result = context.Translate<TEntity>(reader).ToList();
            for (int i = 0; i < result.Count; i++)
                result[i] = AttachEntityToContext(result[i]);
            //close up the reader, we're done saving results
            reader.Close();
            return result;
        }

如您所见，它正在映射到Product实体。但是，在我的结果集中，coloumn无法自动映射，它始终为null。我想将CategoryName coloumn值映射到CategoryName属性。我怎么能做到这一点？

Answer 1

您可以使用必填字段在Nop.Core中创建另一个类，而返回的产品表则返回该表。这个类可以是临时的，通过在存储过程本身创建表并在最后删除。

如何使用Entity Framework 6从存储过程中获取额外的列值？

1 个答案: