如何在Map Basic上读取GPS XML文件？
如何在Map Basic上读取GPS XML文件？
提问于 2015-02-17 16:45:22
我想写一个程序，在下面读取XML文件。
<?xml version="1.0" encoding="UTF-8"?>
-<GPSLog cultureInfo="tr-TR" name="GPS 1_Log" version="4.0.3860">
-<PVTInfo Mode="GPSModeType3D" Status="GPSStatusTypeDOINGFIXES" TDOP="0"
VDOP="0,7" HDOP="0,7" PDOP="1,476482" Depth="0"
MagneticVariation="-5,19999999999999" Heading="338,9" Speed="0,05"
GeoidHeight="1089,9" EllipsoidHeight="1120" Longitude="35,5297421666667"
Latitude="38,7525401666667" LastTime="51969,2" Time="51969,3"
ValidFlags="14327" >
-<Satellites>
<SatInfo Used="True" SNR="42" Azimuth="242" Elevation="70" PRN="69"/>
<SatInfo Used="True" SNR="43" Azimuth="188" Elevation="61" PRN="28"/>
<SatInfo Used="True" SNR="47" Azimuth="282" Elevation="41" PRN="5"/>
<SatInfo Used="True" SNR="47" Azimuth="202" Elevation="35" PRN="10"/>
<SatInfo Used="True" SNR="45" Azimuth="53" Elevation="45" PRN="7"/>
<SatInfo Used="True" SNR="38" Azimuth="123" Elevation="31" PRN="9"/>
<SatInfo Used="True" SNR="35" Azimuth="172" Elevation="28" PRN="74"/>
<SatInfo Used="True" SNR="32" Azimuth="62" Elevation="13" PRN="91"/>
<SatInfo Used="True" SNR="47" Azimuth="10" Elevation="69" PRN="30"/>
<SatInfo Used="True" SNR="40" Azimuth="324" Elevation="33" PRN="78"/>
<SatInfo Used="True" SNR="40" Azimuth="347" Elevation="63" PRN="72"/>
<SatInfo Used="True" SNR="38" Azimuth="310" Elevation="25" PRN="13"/>
<SatInfo Used="False" SNR="37" Azimuth="139" Elevation="36" PRN="39"/>
<SatInfo Used="False" SNR="38" Azimuth="264" Elevation="34" PRN="85"/>
<SatInfo Used="False" SNR="33" Azimuth="59" Elevation="15" PRN="19"/>
<SatInfo Used="False" SNR="38" Azimuth="181" Elevation="12" PRN="20"/>
<SatInfo Used="False" SNR="19" Azimuth="110" Elevation="7" PRN="84"/
</Satellites>
</PVTInfo>我需要Lat，Long和time值，所以我想在读取文件时跳过其他东西。我将使用这些点来绘制直线对象。
提前感谢
回答 1
Stack Overflow用户
发布于 2015-02-17 23:16:23
MapBasic提供了许多特定于XML的函数。您的代码可能如下所示(未经过测试)：
Dim xmlDoc as MIXmlDocument
Dim xmlNode As MIXmlNode
Dim res Integer
Dim pbParsingError As SmallInt
Dim lat as String
hxml = MIXmlDocumentCreate( )
res := MIXmlDocumentLoad(xmlDoc, "C:\Your_Path\Your_File.xml", pbParsingError, 0, 0)
xmlNode = MIXmlDocumentGetRootNode(xmlDoc)
xmlNode = MIXmlSelectSingleNode(xmlNode, "/GPSLog/PVTInfo")
res = MIXmlNodeGetAttributeValue(xmlNode, "Latitude", lat, 20)
Print "Latitude = " + lat
MIXmlDocumentDestroy(xmlDoc)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/28557870
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