C# - How To Populate A TreeView Using EntityDataSource

I use MS SQL, EF 4 and C#.

I have a table in SQL fro "Categories" and I need populate a TreeView in my Asp.net page.

My question are:

1 - How can i populate the TreeView?
2 - How can i use the TreeView to modify the hierarchy of my Categories?

NOTE: I use "hierarchyid" SQL Columns!

CREATE TABLE dbo.CmsCategories
(
CategoryId int NOT NULL IDENTITY (0,1) -- Seed = 0 and Increment= 1
CONSTRAINT PK_CmsCategories_CategoryId PRIMARY KEY,
Title nvarchar(40) NOT NULL,
MetaDescription nvarchar(160) NOT NULL,
MetaKeyword nvarchar(128) NOT NULL,
Summary nvarchar(256) NOT NULL,
IsPublished bit NOT NULL
CONSTRAINT DF_CmsCategories_IsPublished DEFAULT 1,
CategoryNode hierarchyid NOT NULL,
CategoryNodeLevel AS CategoryNode.GetLevel()
);