RiaanJac Ответов: 1

Как найти конкретный узел в XML с помощью VB.NET

У меня есть xml-файл, как указано ниже.
<?xml version="1.0"?>
<CableSystem xmlns="http://pkinetics.com/oasys.net">
  <Cable ID="23646_00_M727440" Desc="Cable" AnalysisSetup="OFCData1">
    <CableSetup>
      <OTDRSetups>
        <OTDRSetup ID="SM 2 Wavelength">
          <AdditionalRange>5000</AdditionalRange>
          <Range>0</Range>
          <RangeMode>LengthBased</RangeMode>
          <OTDRWavelengthSetup Availability="EnabledAlways" WavelengthID="1310">
            <AverageCounts>256</AverageCounts>
            <AverageMode>NoiseBased</AverageMode>
            <AverageNoise>0.01</AverageNoise>
            <AverageNoiseLocation>500</AverageNoiseLocation>
            <AverageNoiseTimeout>3</AverageNoiseTimeout>
            <AverageTime>1</AverageTime>
            <Bandwidth>1</Bandwidth>
            <Gain>-1</Gain>
            <PointSpacing>4</PointSpacing>
            <Pulsewidth>10</Pulsewidth>
            <Wavelength>1310</Wavelength>
          </OTDRWavelengthSetup>
          <OTDRWavelengthSetup Availability="EnabledAlways" WavelengthID="1550">
            <AverageCounts>256</AverageCounts>
            <AverageMode>NoiseBased</AverageMode>
            <AverageNoise>0.01</AverageNoise>
            <AverageNoiseLocation>500</AverageNoiseLocation>
            <AverageNoiseTimeout>3</AverageNoiseTimeout>
            <AverageTime>1</AverageTime>
            <Bandwidth>1</Bandwidth>
            <Gain>-1</Gain>
            <PointSpacing>4</PointSpacing>
            <Pulsewidth>10</Pulsewidth>
            <Wavelength>1550</Wavelength>
          </OTDRWavelengthSetup>
        </OTDRSetup>
      </OTDRSetups>
      <AnalysisSetups>
        <AnalysisSetup ID="OFCData1">
          <AnalysisWavelengthSetup WavelengthID="1310">
            <AnalysisParams>
              <EndLossThresh>3</EndLossThresh>
              <MaxAttenuation>0.69999999999999984</MaxAttenuation>
              <MinAttenuation>0.1</MinAttenuation>
              <Sensitivity>0.01</Sensitivity>
              <Wavelength>1310</Wavelength>
              <WindowWidth>1000.0000000000002</WindowWidth>
              <WindowStep>200.00000000000003</WindowStep>
              <WindowStartOffset>300.00000000000006</WindowStartOffset>
              <WindowStopOffset>100.00000000000001</WindowStopOffset>
              <WindowStepAround>true</WindowStepAround>
            </AnalysisParams>
            <Limits Aspect="Unidirectional">
              <Attenuation>
                <MaxFail>0.4</MaxFail>
                <MaxFlag>0.37999999999999995</MaxFlag>
                <MinFlag>0.31999999999999995</MinFlag>
                <MinFail>0.29999999999999993</MinFail>
              </Attenuation>
              <BufferLoss>
                <MaxFail>1.5</MaxFail>
                <MaxFlag>1</MaxFlag>
                <MinFlag>-0.08</MinFlag>
                <MinFail>-1</MinFail>
              </BufferLoss>
              <BufferReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </BufferReflectance>
              <FiberLength>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.015</MaxFlag>
                <MinFlag>-0.015</MinFlag>
                <MinFail>-0.05</MinFail>
              </FiberLength>
              <LsaPointDeviation>
                <MaxFail>1</MaxFail>
                <MaxFlag>0.04</MaxFlag>
              </LsaPointDeviation>
              <EventLoss>
                <MaxFail>0.08</MaxFail>
                <MaxFlag>0.05</MaxFlag>
                <MinFlag>-0.05</MinFlag>
                <MinFail>-0.08</MinFail>
              </EventLoss>
              <EventReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </EventReflectance>
              <WindowAttenuation>
                <MaxFail>0.4</MaxFail>
                <MaxFlag>0.37999999999999995</MaxFlag>
                <MinFlag>0.31999999999999995</MinFlag>
                <MinFail>0.29999999999999993</MinFail>
              </WindowAttenuation>
              <WindowUniformity>
                <MaxFail>0.019999999999999997</MaxFail>
                <MaxFlag>0.0099999999999999985</MaxFlag>
                <MinFlag>-0.0099999999999999985</MinFlag>
                <MinFail>-0.019999999999999997</MinFail>
              </WindowUniformity>
            </Limits>
            <Limits Aspect="Bidirectional">
              <Attenuation>
                <MaxFail>0.4</MaxFail>
                <MaxFlag>0.37999999999999995</MaxFlag>
                <MinFlag>0.31999999999999995</MinFlag>
                <MinFail>0.29999999999999993</MinFail>
              </Attenuation>
              <BufferLoss>
                <MaxFail>1.5</MaxFail>
                <MaxFlag>1</MaxFlag>
                <MinFlag>-0.08</MinFlag>
                <MinFail>-1</MinFail>
              </BufferLoss>
              <BufferReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </BufferReflectance>
              <FiberLength>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.015</MaxFlag>
                <MinFlag>-0.015</MinFlag>
                <MinFail>-0.05</MinFail>
              </FiberLength>
              <LsaPointDeviation>
                <MaxFail>1</MaxFail>
                <MaxFlag>0.04</MaxFlag>
              </LsaPointDeviation>
              <EventLoss>
                <MaxFail>0.08</MaxFail>
                <MaxFlag>0.05</MaxFlag>
                <MinFlag>-0.05</MinFlag>
                <MinFail>-0.08</MinFail>
              </EventLoss>
              <EventReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </EventReflectance>
              <WindowAttenuation>
                <MaxFail>0.4</MaxFail>
                <MaxFlag>0.37999999999999995</MaxFlag>
                <MinFlag>0.31999999999999995</MinFlag>
                <MinFail>0.29999999999999993</MinFail>
              </WindowAttenuation>
              <WindowUniformity>
                <MaxFail>0.019999999999999997</MaxFail>
                <MaxFlag>0.0099999999999999985</MaxFlag>
                <MinFlag>-0.0099999999999999985</MinFlag>
                <MinFail>-0.019999999999999997</MinFail>
              </WindowUniformity>
            </Limits>
          </AnalysisWavelengthSetup>
          <AnalysisWavelengthSetup WavelengthID="1550">
            <AnalysisParams>
              <EndLossThresh>3</EndLossThresh>
              <MaxAttenuation>0.5</MaxAttenuation>
              <MinAttenuation>0.1</MinAttenuation>
              <Sensitivity>0.01</Sensitivity>
              <Wavelength>1550</Wavelength>
              <WindowWidth>999.52273811958833</WindowWidth>
              <WindowStep>199.90454762391769</WindowStep>
              <WindowStartOffset>299.85682143587655</WindowStartOffset>
              <WindowStopOffset>99.952273811958847</WindowStopOffset>
              <WindowStepAround>true</WindowStepAround>
            </AnalysisParams>
            <Limits Aspect="Unidirectional">
              <Attenuation>
                <MaxFail>0.24999999999999997</MaxFail>
                <MaxFlag>0.22999999999999998</MaxFlag>
                <MinFlag>0.16999999999999998</MinFlag>
                <MinFail>0.14999999999999997</MinFail>
              </Attenuation>
              <BufferLoss>
                <MaxFail>1.5</MaxFail>
                <MaxFlag>1</MaxFlag>
                <MinFlag>-1</MinFlag>
                <MinFail>-2</MinFail>
              </BufferLoss>
              <BufferReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </BufferReflectance>
              <FiberLength>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.015</MaxFlag>
                <MinFlag>-0.015</MinFlag>
                <MinFail>-0.05</MinFail>
              </FiberLength>
              <LsaPointDeviation>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.04</MaxFlag>
              </LsaPointDeviation>
              <EventLoss>
                <MaxFail>0.25</MaxFail>
                <MaxFlag>0.05</MaxFlag>
                <MinFlag>-0.05</MinFlag>
                <MinFail>-0.08</MinFail>
              </EventLoss>
              <EventReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </EventReflectance>
              <WindowAttenuation>
                <MaxFail>0.24999999999999997</MaxFail>
                <MaxFlag>0.22999999999999998</MaxFlag>
                <MinFlag>0.16999999999999998</MinFlag>
                <MinFail>0.14999999999999997</MinFail>
              </WindowAttenuation>
              <WindowUniformity />
            </Limits>
            <Limits Aspect="Bidirectional">
              <Attenuation>
                <MaxFail>0.24999999999999997</MaxFail>
                <MaxFlag>0.22999999999999998</MaxFlag>
                <MinFlag>0.16999999999999998</MinFlag>
                <MinFail>0.14999999999999997</MinFail>
              </Attenuation>
              <BufferLoss>
                <MaxFail>1.5</MaxFail>
                <MaxFlag>1</MaxFlag>
                <MinFlag>-1</MinFlag>
                <MinFail>-2</MinFail>
              </BufferLoss>
              <BufferReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </BufferReflectance>
              <FiberLength>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.015</MaxFlag>
                <MinFlag>-0.015</MinFlag>
                <MinFail>-0.05</MinFail>
              </FiberLength>
              <LsaPointDeviation>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.04</MaxFlag>
              </LsaPointDeviation>
              <EventLoss>
                <MaxFail>0.08</MaxFail>
                <MaxFlag>0.05</MaxFlag>
                <MinFlag>-0.05</MinFlag>
                <MinFail>-0.08</MinFail>
              </EventLoss>
              <EventReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </EventReflectance>
              <WindowAttenuation>
                <MaxFail>0.24999999999999997</MaxFail>
                <MaxFlag>0.22999999999999998</MaxFlag>
                <MinFlag>0.16999999999999998</MinFlag>
                <MinFail>0.14999999999999997</MinFail>
              </WindowAttenuation>
              <WindowUniformity />
            </Limits>
          </AnalysisWavelengthSetup>
          <AnalysisWavelengthSetup WavelengthID="1625">
            <AnalysisParams>
              <EndLossThresh>3</EndLossThresh>
              <MaxAttenuation>0.5</MaxAttenuation>
              <MinAttenuation>0.10000000000000002</MinAttenuation>
              <Sensitivity>0.01</Sensitivity>
              <Wavelength>1625</Wavelength>
              <WindowWidth>999.1821155943295</WindowWidth>
              <WindowStep>199.8364231188659</WindowStep>
              <WindowStartOffset>299.75463467829883</WindowStartOffset>
              <WindowStopOffset>99.918211559432947</WindowStopOffset>
              <WindowStepAround>true</WindowStepAround>
            </AnalysisParams>
            <Limits Aspect="Unidirectional">
              <Attenuation />
              <BufferLoss>
                <MaxFail>1.5</MaxFail>
                <MaxFlag>1</MaxFlag>
                <MinFlag>-1</MinFlag>
                <MinFail>-2</MinFail>
              </BufferLoss>
              <BufferReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </BufferReflectance>
              <FiberLength>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.015</MaxFlag>
                <MinFlag>-0.015</MinFlag>
                <MinFail>-0.05</MinFail>
              </FiberLength>
              <LsaPointDeviation>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.04</MaxFlag>
              </LsaPointDeviation>
              <EventLoss>
                <MaxFail>0.25</MaxFail>
                <MaxFlag>0.05</MaxFlag>
                <MinFlag>-0.05</MinFlag>
                <MinFail>-0.08</MinFail>
              </EventLoss>
              <EventReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </EventReflectance>
              <WindowAttenuation>
                <MaxFail>0.25</MaxFail>
                <MaxFlag>0.23</MaxFlag>
                <MinFlag>0.17</MinFlag>
                <MinFail>0.15</MinFail>
              </WindowAttenuation>
              <WindowUniformity />
            </Limits>
            <Limits Aspect="Bidirectional">
              <Attenuation>
                <MaxFail>0.25</MaxFail>
                <MaxFlag>0.23</MaxFlag>
                <MinFlag>0.17</MinFlag>
                <MinFail>0.15</MinFail>
              </Attenuation>
              <BufferLoss>
                <MaxFail>1.5</MaxFail>
                <MaxFlag>1</MaxFlag>
                <MinFlag>-1</MinFlag>
                <MinFail>-2</MinFail>
              </BufferLoss>
              <BufferReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </BufferReflectance>
              <FiberLength>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.015</MaxFlag>
                <MinFlag>-0.015</MinFlag>
                <MinFail>-0.05</MinFail>
              </FiberLength>
              <LsaPointDeviation>
                <MaxFail>0.05</MaxFail>
                <MaxFlag>0.04</MaxFlag>
              </LsaPointDeviation>
              <EventLoss>
                <MaxFail>0.08</MaxFail>
                <MaxFlag>0.05</MaxFlag>
                <MinFlag>-0.05</MinFlag>
                <MinFail>-0.08</MinFail>
              </EventLoss>
              <EventReflectance>
                <MaxFail>-45</MaxFail>
                <MaxFlag>-50</MaxFlag>
              </EventReflectance>
              <WindowAttenuation>
                <MaxFail>0.25</MaxFail>
                <MaxFlag>0.23</MaxFlag>
                <MinFlag>0.17</MinFlag>
                <MinFail>0.15</MinFail>
              </WindowAttenuation>
              <WindowUniformity />
            </Limits>
          </AnalysisWavelengthSetup>
        </AnalysisSetup>
      </AnalysisSetups>
      <FiberTypes />
      <RibbonTypes />
    </CableSetup>
    <CableInfo>
      <FiberLength>8170</FiberLength>
      <FiberID Label="Cable ID">23646_00_M727440</FiberID>
      <FiberID Label="Operator ID">843</FiberID>
    </CableInfo>
    <Group ID="54477_00_BLUE" Desc="Tube" OTDRSetup="SM 2 Wavelength">
      <Fiber ID="118COR024376T00BE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024456T00OE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024139T00GN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023866T00BN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023761T00GY0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024200T00WE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023708T00RD0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024098T00BK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023960T00YW0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024416T00VT0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024214T00PK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024208T00TE0" Desc="Fiber" FiberType="SM" />
    </Group>
    <Group ID="54478_00_ORANGE" Desc="Tube" OTDRSetup="SM 2 Wavelength">
      <Fiber ID="118COR024349T00BE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024437T00OE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024083T00GN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023905T00BN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023795T00GY0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024257T00WE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023711T00RD0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024013T00BK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024045T00YW0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024421T00VT0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024278T00PK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024174T00TE0" Desc="Fiber" FiberType="SM" />
    </Group>
    <Group ID="54479_00_GREEN" Desc="Tube" OTDRSetup="SM 2 Wavelength">
      <Fiber ID="118COR024376T00BE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024456T00OE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024139T00GN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023866T00BN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023761T00GY0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024200T00WE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023708T00RD0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024098T00BK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023960T00YW0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024416T00VT0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024214T00PK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024208T00TE0" Desc="Fiber" FiberType="SM" />
    </Group>
    <Group ID="54480_00_BROWN" Desc="Tube" OTDRSetup="SM 2 Wavelength">
      <Fiber ID="118COR024378T00BE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024358T00OE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024133T00GN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023867T00BN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024242T00GY0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024137T00WE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023720T00RD0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024105T00BK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023732T00YW0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024355T00VT0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024181T00PK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024262T00TE0" Desc="Fiber" FiberType="SM" />
    </Group>
    <Group ID="54481_00_GREY" Desc="Tube" OTDRSetup="SM 2 Wavelength">
      <Fiber ID="118COR024368T00BE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024446T00OE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024051T00GN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023863T00BN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023934T00GY0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024288T00WE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023712T00RD0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024095T00BK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023849T00YW0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024429T00VT0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024210T00PK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024036T00TE0" Desc="Fiber" FiberType="SM" />
    </Group>
    <Group ID="54482_00_WHITE" Desc="Tube" OTDRSetup="SM 2 Wavelength">
      <Fiber ID="118COR024349T00BE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024437T00OE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024083T00GN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023905T00BN0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023795T00GY0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024257T00WE0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR023711T00RD0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024013T00BK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024045T00YW0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024421T00VT0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024278T00PK0" Desc="Fiber" FiberType="SM" />
      <Fiber ID="118COR024174T00TE0" Desc="Fiber" FiberType="SM" />
    </Group>
  </Cable>
</CableSystem>


Мне нужно, чтобы изменить атрибут &ЛТ;maxfail&ГТ;0,4 от &ЛТ;AnalysisWavelengthSetup WavelengthID="1310"&ГТ; узел.

Что я уже пробовал:

Dim nodeList As XmlNodeList = xmlDoc.SelectNodes("//*")

       'Loop through the selected Nodes.
       For Each node As XmlNode In nodeList
           Console.WriteLine("Name: " + node.Name)
       Next

Дал список из 347 узлов.

Dim nodeList As XmlNodeList = xmlDoc.SelectNodes("//AnalysisWavelengthSetup/*")

       'Loop through the selected Nodes.
       For Each node As XmlNode In nodeList
           Console.WriteLine("Name: " + node.Name)
       Next

Не дал никаких результатов

1 Ответов

Рейтинг:
4

Richard Deeming

Ваш XML-документ имеет пространство имен по умолчанию. Вам нужно будет использовать XmlNamespaceManager чтобы расспросить его.

Dim ns As New XmlNamespaceManager(xmlDoc.NameTable)
ns.AddNamespace("a", "http://pkinetics.com/oasys.net")

Dim nodeList As XmlNodeList = xmlDoc.SelectNodes("//a:AnalysisWavelengthSetup/*", ns)

узел XmlNode.Метод SelectNodes (System.Xml) | Microsoft Docs[^]