使用Linq加载部分实体到实体 | 使用Linq加载部分实体到实体

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问题描述

  Dim contacts = From c In My.Context。联系人_ 
选择新联系人{_ 
 .ContactId = c.ContactId，_ 
 .Name = c.Name 
}

我尝试过，我得到以下NotSupportedException：实体或复合类型CompleteKitchenModel.Contact不能在LINQ to Entities中构建查询

谢谢

解决方案

必须使用匿名类型：

  Dim contacts = From c In My.Context.Contacts _ 
选择新建{_ 
 .ContactId = c.ContactId，_ 
 .Name = c.Name 
}

然后将数据复制到联系人列表：

 对于每个联系人在联系人
 Dim c与{.ContactId = c.ContactId，.Name = c.Name}的新联系
 //添加到列表
 Ne xt

不支持您的语法错误，

I am trying to load a partial entity with Linq to Entities:

Dim contacts = From c In My.Context.Contacts _
     Select New Contact With { _
         .ContactId = c.ContactId, _
         .Name = c.Name
     }

I tried it and I get the following NotSupportedException: "The entity or complex type 'CompleteKitchenModel.Contact' cannot be constructed in a LINQ to Entities query."

Thanks

解决方案

You'll have to use anonymous type:

Dim contacts = From c In My.Context.Contacts _
 Select New With { _
     .ContactId = c.ContactId, _
     .Name = c.Name
 }

and then copy data to Contact list:

For Each contact In contacts
     Dim c As New Contact With { .ContactId = c.ContactId, .Name = c.Name}
     //Add to list
Next

Your syntax, as error says, is not supported.

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