初学C#没多久，喜欢编一些小程序自己玩玩。
文本内容如下，行数没法确定，我想从检测到“GCP label“之后成行读取，直到没有该数据为止。
然后对读取的
<GCP label="F1" alt="827.3882601642981" lat="35.09728123138197" lng="107.9195570049454" x="492632.598" y="3885434.835" z="889.992" tiePoint3D="false" index="0" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
数据进行类似EXCEL进行分列。大致为“点名”，“高度”“经度”“纬度”“X”，“Y”，“Z”等等……
输出成果比如
F1 827.3882601642981 35.09728123138197 107.9195570049454 492632.598 3885434.835 889.992
F2 …………
不胜感激！
TXT文件内容大致如下：
<?xml version="1.0" encoding="utf-8"?>
……
……
……
<focalLengthmm value="35"/>
<radialK1 value="0"/>
<radialK2 value="0"/>
<radialK3 value="0"/>
<tangentialT1 value="0"/>
<tangentialT2 value="0"/>
<calibReliability value="1"/>
<source value="exif"/>
<band name="Red" centralWaveLength="660" width="0" weight="0.2126"/>
<band name="Green" centralWaveLength="550" width="0" weight="0.7152"/>
<band name="Blue" centralWaveLength="470" width="0" weight="0.0722"/>
<fixedBands value="false"/>
<sensorWidthmm value="35.0000016"/>
</camera>
<GCP label="F1" alt="827.3882601642981" lat="35.09728123138197" lng="107.9195570049454" x="492632.598" y="3885434.835" z="889.992" tiePoint3D="false" index="0" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F2" alt="834.4799257609993" lat="35.09739118364963" lng="107.9165858619901" x="492361.702" y="3885447.256" z="897.085" tiePoint3D="false" index="1" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F3" alt="830.9783794358373" lat="35.09829349327527" lng="107.912486136961" x="491987.981" y="3885547.68" z="893.585" tiePoint3D="false" index="2" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F4" alt="896.7277699299157" lat="35.09755974687279" lng="107.9225770669944" x="492907.989" y="3885465.516" z="959.33" tiePoint3D="false" index="3" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F6" alt="886.2842321451753" lat="35.09703320990255" lng="107.9132348860874" x="492056.129" y="3885407.803" z="948.891" tiePoint3D="false" index="5" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F7" alt="890.258914001286" lat="35.09788375140636" lng="107.9096703913349" x="491731.206" y="3885502.452" z="952.867" tiePoint3D="false" index="6" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F8" alt="843.475115259178" lat="35.10031918798298" lng="107.9058835769165" x="491386.185" y="3885772.962" z="906.084" tiePoint3D="false" index="7" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F9" alt="893.2351437583566" lat="35.1008753137337" lng="107.9011548043902" x="490955.097" y="3885835.077" z="955.846" tiePoint3D="false" index="8" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<GCP label="F10" alt="858.8022832032293" lat="35.10133235071497" lng="107.9010685729101" x="490947.285" y="3885885.789" z="921.413" tiePoint3D="false" index="9" toleranceXY="0.02" toleranceZ="0.02" type="0"/>
<image path="F:\kou\Photo1\DSC04705.JPG" type="group1" enabled="true">
……
……
……
------解决思路----------------------
换用方法：因dataset读取时，你文件中有２个index，所以出错了，
XDocument item = XDocument.Load("tingkou2.xml");
StreamWriter sw = new StreamWriter("ntest.txt");
var result = from x in item.Descendants("GCP")
select new
{
label = x.Attribute("label").Value,
alt = x.Attribute("alt").Value,
lat = x.Attribute("lat").Value,
lng = x.Attribute("lng").Value,
x = x.Attribute("x").Value,
y = x.Attribute("y").Value
};
foreach (var el in result)
{
//MessageBox.Show(el.label + " " + el.alt + " " + el.lat);
sw.WriteLine(el.label + " " + el.alt + " " + el.lat+" "+el.lng+" "+el.x+" "+el.y);
}
sw.Close();