我正在尝试从KML文件中的地标中提取多边形。到目前为止一切顺利:
Imports <xmlns:g='http://earth.google.com/kml/2.0'>
Imports System.Xml.Linq
Partial Class Test_ImportPolygons
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim Kml As XDocument = XDocument.Load(Server.MapPath("../kmlimport/ga.kml"))
For Each Placemark As XElement In Kml.<g:Document>.<g:Folder>.<g:Placemark>
Dim Name As String = Placemark.<g:name>.Value
...
Next
End Sub
End Class
我想将整个<polygon>...</polygon>
块捕获为字符串。我试过这样的事情(上面的......):
Dim Polygon as String = Placemark.<g:Polygon>.InnerText
但是XElement对象没有InnerText属性,或者就我所知的任何等价物而言。如何获取定义XElement的原始XML?
答案 0 :(得分:1)
你试过了吗?
Placemark.ToString()
答案 1 :(得分:1)
我缺少的是Placemark.<g:Polygon>
是XElements的集合,而不是单个XElement。这有效:
For Each Placemark As XElement In Kml.<g:Document>.<g:Folder>.<g:Placemark>
Dim Name As String = Placemark.<g:name>.Value
Dim PolygonsXml As String = ""
For Each Polygon As XElement In Placemark.<g:Polygon>
PolygonsXml &= Polygon.ToString
Next
Next
XElement.ToString相当于InnerText,正如tbrownell建议的那样。
答案 2 :(得分:0)
我也错过了枚举。使用.Value时,可能会收到null异常。试试相同的方法:
(string)Placemark.<g:name>
抱歉不确定VB语法,,,因为我用VB编码已经有一段时间了。