EF代码第一：EntitySet的名称“TestDBContext1.Customers”找不到

Question

我收到此错误

Additional information: The EntitySet name 'TestDBContext1.Customers' could not be found.

我试图调用SQL Server存储过程返回多个结果集。

这是我的全码：

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 stored procedure 
     var cmd = db.Database.Connection.CreateCommand(); 
     cmd.CommandText = "[dbo].[MultiResultSet]"; 

     try 
     { 
      db.Database.Connection.Open(); 

      // Run the stored procedure 
      var reader = cmd.ExecuteReader(); 

      // Read Blogs from the first result set 
      var customers = ((IObjectContextAdapter)db) 
         .ObjectContext 
         .Translate<Customer>(reader, "Customers", MergeOption.AppendOnly); 

      foreach (var item in customers) 
      { 
       Console.WriteLine(item.FirstName); 
      } 

      // Move to second result set and read Posts 
      reader.NextResult(); 

      var Addresses = ((IObjectContextAdapter) db) 
         .ObjectContext 
         .Translate<Addresses>(reader, "Addresses", MergeOption.AppendOnly); 

      foreach (var item in Addresses) 
      { 
       Console.WriteLine(item.Address1); 
      } 
     } 
     finally 
     { 
      db.Database.Connection.Close(); 
     } 
    } 
} 

此行抛出上述错误：

var customers = ((IObjectContextAdapter)db) 
.ObjectContext 
.Translate<Customer>(reader, "Customers", MergeOption.AppendOnly); 

我的数据库表是Customers和Addresses。为什么我得到这个错误？在我的代码中更改什么？

有趣的是，当我像下面的方式编码，然后一切正常。

var customers = ((IObjectContextAdapter)db) 
.ObjectContext 
.Translate<Customer>(reader); 

的那一刻，我从代码中删除"Customers", MergeOption.AppendOnly然后代码工作正常。只是不明白我上面的代码中有什么问题。请有人帮我理解这一点。谢谢

Answer 1

我不认为你的实体集有一个名字。我认为，如果你通过null作为第二输入Translate，它会做你想要什么：

var customers = ((IObjectContextAdapter)db) 
    .ObjectContext 
    .Translate<Customer>(reader, null, MergeOption.AppendOnly);