[DNN模块开发]让模块支持“导入”“导出”功能

DNN模块可以支持导入导出功能，通过将模块内容导入到XML文件可以便于模块内容备份和转移，也可将模块内容事先以XML格式保存通过导入功能实现模块内容的批量录入。如图：

要实现模块的导入导出功能，需要在模块的业务逻辑访问对象（***Controller）中实现IPortable接口：

1、IPortable接口（components\Modules\IPortable.vb）

Namespace DotNetNukeNamespace DotNetNuke.Entities.Modules

' 模块导出导入功能接口

Public Interface IPortableInterface IPortable

' 模块导出

Function ExportModule()Function ExportModule(ByVal ModuleID As Integer) As String

' 模块导入

Sub ImportModule()Sub ImportModule(ByVal ModuleID As Integer, ByVal Content As String, ByVal Version As String, ByVal UserID As Integer)

End Interface

End Namespace

2、在相应模块的业务逻辑类中实现IPortable接口（这一步可根据模块具体情况作出相应的修改，可参照DNN已有模块做，如：Links）

Namespace DotNetNukeNamespace DotNetNuke.Modules.Links

Public Class LinkControllerClass LinkController

Implements Entities.Modules.IPortable

' 实现导出功能接口

Public Function ExportModule()Function ExportModule(ByVal ModuleID As Integer) As String Implements DotNetNuke.Entities.Modules.IPortable.ExportModule

' 获取该模块的全部链接信息

Dim strXML As String = ''

Dim arrLinks As ArrayList = GetLinks(ModuleID)

' 根据该模块的字段决定XML的节点

If arrLinks.Count <> 0 Then

strXML += '<links>'

Dim objLink As LinkInfo

For Each objLink In arrLinks

' 编写模块内容的每一条记录

strXML += '<link>'

strXML += '<title>' & XMLEncode(objLink.Title) & '</title>'

strXML += '<url>' & XMLEncode(objLink.Url) & '</url>'

strXML += '<vieworder>' & XMLEncode(objLink.ViewOrder.ToString) & '</vieworder>'

strXML += '<description>' & XMLEncode(objLink.Description) & '</description>'

strXML += '<newwindow>' & XMLEncode(objLink.NewWindow.ToString) & '</newwindow>'

strXML += '</link>'

strXML += '</links>'

End If

Return strXML

End Function

' 实现导入功能接口

Public Sub ImportModule()Sub ImportModule(ByVal ModuleID As Integer, ByVal Content As String, ByVal Version As String, ByVal UserID As Integer) Implements DotNetNuke.Entities.Modules.IPortable.ImportModule

Dim xmlLink As XmlNode

Dim xmlLinks As XmlNode = GetContent(Content, 'links')

' 从XML中解析每一条记录

For Each xmlLink In xmlLinks.SelectNodes('link')

Dim objLink As New LinkInfo

objLink.ModuleId = ModuleID

objLink.Title = xmlLink.Item('title').InnerText

objLink.Url = ImportUrl(ModuleID, xmlLink.Item('url').InnerText)

objLink.ViewOrder = Integer.Parse(xmlLink.Item('vieworder').InnerText)

objLink.Description = xmlLink.Item('description').InnerText

objLink.NewWindow = Boolean.Parse(xmlLink.Item('newwindow').InnerText)

objLink.CreatedByUser = UserId.ToString

AddLink(objLink)

End Sub

End Class

End Namespace

注意：在打包安装文件时，需要在DNN文件的<businesscontrollerclass>节点写明该模块的业务逻辑类，如：

<businesscontrollerclass>DNNChina.Modules.CLinks.CLinksController, DNNChina.Modules.CLinks</businesscontrollerclass>