让模块支持“导入”“导出”功能

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>"
Next
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)
Next
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>