asp.net - Telerik ASP.NET AJAX RadTreeView 显示来自两个连接表的分层数据

Question

我想使用 Telerik RAD TreeView 控件在其中显示部门和员工，如下所示：

-Dep1
   --Emp1
   --Emp2
-Dep2
   --Emp3
-Dep3
  --Emp4
  --Emp5 

我有 2 个表Employees 和Department 具有一对多的关系，所以DepartmentId 在两个表中。

所有在线演示都将使用自引用表显示分层数据，那么如何从 2 个连接表中实现呢？

Answer 1

Make your data query statement look like the hierarchical data you want to present.

Trying querying your data with a statement like:

SELECT 
    DeptId as Id,   
    NULL as ParentId,   
    Name 
FROM 
    dept
UNION
SELECT 
    EmpID*1000 as Id,           
    DeptId as ParentId,         
    Name
FROM 
    Emp

Then you can bind your RadTreeView with arguments like the following:

<telerik:RadTreeView ID="RadTreeView1" runat="server" Width="100%" Height="250px"
                DataSourceID="MyDataSource" DataFieldID="Id" DataFieldParentID="ParentId"
                DataTextField="Name">
</telerik:RadTreeView>