我怀疑此 [

I suspect that this[^] will help you ( how to return XML from SQL Server )

尝试此控件
可绑定的TreeView
添加到您的bin文件夹并将其作为新项目添加到工具箱中，这需要
(ID，父母ID，文本，表格名称，连接字符串)

Try This control
Bindable TreeView
Add To your bin folder and add it as new item in your toolbox it takes
(ID,ParentID,Text,TableName,ConnectionString)