【发布时间】:2016-11-19 16:20:18
【问题描述】:
我看了这篇文章https://romiller.com/2012/08/15/code-first-stored-procedures-with-multiple-results/
并尝试实现以下代码来处理返回多个结果集的存储过程。
这些是我包含的命名空间:
using System.Data;
using System.Data.SqlClient;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Objects;
查看我的完整代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Objects;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using EFTest.demo1;
namespace EFTest
{
public partial class CallSP : Form
{
public CallSP()
{
InitializeComponent();
}
private void button4_Click(object sender, EventArgs e)
{
using (var db = new TestDBContext1())
{
db.Database.Initialize(force: false);
// Create a SQL command to execute the sproc
var cmd = db.Database.Connection.CreateCommand();
cmd.CommandText = "[dbo].[MultiResultSet]";
try
{
db.Database.Connection.Open();
// Run the sproc
var reader = cmd.ExecuteReader();
// Read Blogs from the first result set
var blogs = ((IObjectContextAdapter)db)
.ObjectContext
.Translate<Customer>(reader, "Customers", MergeOption.AppendOnly);
foreach (var item in blogs)
{
Console.WriteLine(item.Name);
}
// Move to second result set and read Posts
reader.NextResult();
var posts = ((IObjectContextAdapter)db)
.ObjectContext
.Translate<Addresses>(reader, "Addresses", MergeOption.AppendOnly);
foreach (var item in posts)
{
Console.WriteLine(item.Title);
}
}
finally
{
db.Database.Connection.Close();
}
}
}
}
}
返回多个结果集的示例存储过程
CREATE PROCEDURE [dbo].[MultiResultSet]
AS
SELECT * FROM Customers
SELECT * FROM Addresses
我收到编译错误。
最好的重载方法匹配 'System.Data.Entity.Core.Objects.ObjectContext.Translate(System.Data.Common.DbDataReader, string, System.Data.Entity.Core.Objects.MergeOption)' 有一些无效 论据
请帮我解决什么问题,结果应该没有编译错误。
谢谢
【问题讨论】:
-
您使用的是 EF5 吗?
标签: c# entity-framework