动态将多个表LINQ绑定到GridView

问题描述

我的LINQ中有两个表:第一个是CertificateType(CID，Name，EID)，第二个是Equipment(EID，EName)，这些表通过"EID"列具有关系.
当我创建一个CertificateType对象时，我可以简单地检索相关的设备名称:

I have two tables in my LINQ: first one is CertificateType (CID,Name,EID) and second one is Equipment(EID,EName), tables have a relation via "EID" column.
When i create a CertificateType object I can simply retrieve the related Equipment Name :

CertificateType Cert = new CertificateType();
string EName = Cert.Equipment.EName;

我动态创建了一个gridview并将其绑定到CertificateType表，问题是如何将Equipment.EName列绑定到我的网格视图?

这是我的GridView代码，在尝试绑定Equipment.Ename时抛出异常:

I made a gridview dynamically and bind it to CertificateType table , the problem is how I can bind Equipment.EName column to my grid view?

here is my GridView code which throw an exception when trying to bind Equipment.Ename :

IQueryable<CertificateType> CTList = CertificateTypeSearch();
GridView1.DataSource = CTList;
//Setting DataKeyNames
GridView1.DataKeyNames = new string[] { "CID", "Name"};
//Binding Data by creating BoundField
BoundField Name = new BoundField();
Name.DataField = "Name";
Name.HeaderText = "Name";

BoundField EquipmentName = new BoundField();
EquipmentName.DataField = "Equipment.EName";
EquipmentName.HeaderText = "Equipment Name";
GridView1.Columns.Add(Name);
GridView1.Columns.Add(EquipmentName);
GridView1.DataBind();

public static IQueryable<CertificateType> CertificateTypeSearch()
{
DataClassesDataContext context = new DataClassesDataContext();
var CertType = (from certificateType in context.CertificateTypes
select certificateType);
return CertType;
}

推荐答案

public static IQueryable<CertificateType> CertificateTypeSearch()
{
DataClassesDataContext context = new DataClassesDataContext();
var CertType = (from certificateType in context.CertificateTypes
select new 
{
  CID = certificateType.CID,
  Name = certificateType.Name,
  EName = certificateType.Equipment
});
return CertType;
}

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