4

我有一个 xml 文件，想向其中一个节点添加一个子元素，不知道为什么 xpath 会抛出空异常。这肯定是因为我可能给出了错误的 xpath 值。在此处添加元素的 xpath 是什么：

我正在使用的 XPath：

//SESSIONANALYSER/KER/MODES/NI/STATEINFORMATION[@TYPE='PREPAID']/INIT/INPUT

这是我要添加子元素的地方：

<KER> 
    <MODES>
      <NI>
        <STATEINFORMATION TYPE="PREPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="LP6ACTIVATION">
             **<I have to add a child element here>**

在以下 xml 中：

<SESSIONANALYSER>
  <AP>
    <MODES>
      <NI>
        <STATEINFORMATION TYPE="PREPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="SLN7ACTIVATION">
              <METHOD NAME="CHECKSUBSCRIBERBALANCE" PARAMETERS="SLN7" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="SLN7" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="SLN7DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="SLN7" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="jk" PARAMETERS="k" POSSIBLEACTIONS1="k" MAINTAINSESSION="h" RESPONSE="l" NEXTLEVEL=";"></METHOD>
              <METHOD NAME="SENDMESSAGE" PARAMETERS="23" POSSIBLEACTIONS1="FALLOUTONSUCCESS" MAINTAINSESSION="yes" RESPONSE="format" NEXTLEVEL="msdfm"></METHOD>
              <METHOD NAME="payments" PARAMETERS="parametervalue" POSSIBLEACTIONS1="fg,f" MAINTAINSESSION="fdjfg89" RESPONSE="ndfgm" NEXTLEVEL="msdfm"></METHOD>
              <METHOD NAME="payments" PARAMETERS="l" POSSIBLEACTIONS1="l" MAINTAINSESSION="l" RESPONSE="l" NEXTLEVEL="l"></METHOD>
              <METHOD NAME="payments" PARAMETERS="l" POSSIBLEACTIONS1="l" MAINTAINSESSION="l" RESPONSE="l" NEXTLEVEL="l"></METHOD>
              <METHOD NAME="payments" PARAMETERS="k" POSSIBLEACTIONS1="k" MAINTAINSESSION="k" RESPONSE="k" NEXTLEVEL="k"></METHOD>
              <METHOD NAME="payments" PARAMETERS="L" POSSIBLEACTIONS1="L" MAINTAINSESSION="L" RESPONSE="L" NEXTLEVEL="L"></METHOD>
              <METHOD NAME="SENDMESSAGE" PARAMETERS="23" POSSIBLEACTIONS1="FALLOUTONSUCCESS" MAINTAINSESSION="yes" RESPONSE="format" NEXTLEVEL="msdfm"></METHOD>
              <METHOD NAME="payments" PARAMETERS="12" POSSIBLEACTIONS1="FALLOUTONSUCCESS" MAINTAINSESSION="yes" RESPONSE="format" NEXTLEVEL="msvm"></METHOD>
              <METHOD NAME="SENDMESSAGE" PARAMETERS="23" POSSIBLEACTIONS1="FALLOUTONSUCCESS" MAINTAINSESSION="yes" RESPONSE="0" NEXTLEVEL="3"></METHOD>
              <METHOD NAME="SENDMESSAGE" PARAMETERS="23" POSSIBLEACTIONS1="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="format" NEXTLEVEL="3"></METHOD>
            </INPUT>
          </INIT>
          <FAILUREREGION INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="LOWBALANCE">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="1" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="SETPSOFAILED">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="2" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="UCIPDEBIT">
              <METHOD NAME="UNSETPSOINMINSAT" PARAMETERS="SLN7" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_UNSETPSO_FALSE" MAINTAINSESSION="NO" RESPONSE="-6" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="3" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="UNSETPSO">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="4" NEXTLEVEL="" />
            </INPUT>
          </FAILUREREGION>
        </STATEINFORMATION>
        <STATEINFORMATION TYPE="POSTPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="SLN7DEACTIVATION">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="5" NEXTLEVEL="" />
            </INPUT>
          </INIT>
        </STATEINFORMATION>
      </NI>
    </MODES>
  </AP>
  <TN>
    <MODES>
      <NI>
        <STATEINFORMATION TYPE="PREPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="LPC16ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LPC16" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP26ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LP26" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP49ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LP49" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LPT16ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LPT16" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP60ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LP60" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LPC16DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LPC16" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP26DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LP26" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <!--<METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />-->
            </INPUT>
            <INPUT VALUE="LP49DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LP49" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LPT16DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LPT16" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP60DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LP60" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
          </INIT>
          <FAILUREREGION INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="LOWBALANCE">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="1" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="SETPSOFAILED">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="2" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="UCIPDEBIT">
              <METHOD NAME="UNSETPSOINMINSAT" PARAMETERS="SLN7" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_UNSETPSO_FALSE" MAINTAINSESSION="NO" RESPONSE="-6" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="3" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="UNSETPSO">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="4" NEXTLEVEL="" />
            </INPUT>
          </FAILUREREGION>
        </STATEINFORMATION>
        <STATEINFORMATION TYPE="POSTPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="5" NEXTLEVEL="" />
            </INPUT>
          </INIT>
        </STATEINFORMATION>
      </NI>
    </MODES>
  </TN>
  <KER>
    <MODES>
      <NI>
        <STATEINFORMATION TYPE="PREPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="LP6ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LP6" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LPSP15ACTIVATION">
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LPSP15" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP6DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LP6" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LPSP15DEACTIVATION">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LPSP15" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="LP6SUBSCRIPTION">
              <METHOD NAME="CHECKSUBSCRIBERBALANCE" PARAMETERS="LP6" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_LOWBALANCE_INSUFFICIENTBALANCE" MAINTAINSESSION="NO" RESPONSE="-3" NEXTLEVEL="" />
              <METHOD NAME="SETPSOINUCIP" PARAMETERS="LP6" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="FIREUCIPDEBIT" PARAMETERS="LP6" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_CHARGINGFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="0" NEXTLEVEL="" />
            </INPUT>
          </INIT>
          <FAILUREREGION INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="LOWBALANCE">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="1" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="CHARGINGFAILED">
              <METHOD NAME="UNSETPSOINUCIP" PARAMETERS="LP6" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_SETPSOFAILED_FALSE" MAINTAINSESSION="NO" RESPONSE="-4" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="6" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="SETPSOFAILED">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="2" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="UCIPDEBIT">
              <METHOD NAME="UNSETPSOINMINSAT" PARAMETERS="SLN7" POSSIBLEACTIONS="FALLOUTON_FAILUREREGION_UNSETPSO_FALSE" MAINTAINSESSION="NO" RESPONSE="-6" NEXTLEVEL="" />
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="3" NEXTLEVEL="" />
            </INPUT>
            <INPUT VALUE="UNSETPSO">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="4" NEXTLEVEL="" />
            </INPUT>
          </FAILUREREGION>
        </STATEINFORMATION>
        <STATEINFORMATION TYPE="POSTPAID">
          <INIT INVALIDINPUTRESPONSE="-2">
            <INPUT VALUE="">
              <METHOD NAME="SENDMESSAGE" PARAMETERS="" POSSIBLEACTIONS="FALLOUTONSUCCESS" MAINTAINSESSION="NO" RESPONSE="5" NEXTLEVEL="" />
            </INPUT>
          </INIT>
        </STATEINFORMATION>
      </NI>
    </MODES>
  </KER>
</SESSIONANALYSER>
4

2 回答 2

2

您正在评估的 XPath 表达式：

//SESSIONANALYSER/KER/MODES/NI/STATEINFORMATION[@TYPE='PREPAID']/INIT/INPUT

不仅选择一个元素，而且选择六个INPUT元素。

您指定要在第一个元素之后添加一个新元素。

因此，使用这个 XPath 表达式，它恰好选择一个（想要的）INPUT元素：

(//SESSIONANALYSER/KER/MODES/NI/STATEINFORMATION[@TYPE='PREPAID']/INIT/INPUT)[1]

大多数 XPath 引擎都提供了SelectNodes()一种返回 a 中选定节点的方法，NodeList程序员需要遍历这个集合——即使只选择了一个节点——请记住这一点。

于 2012-05-18T12:09:03.820 回答
1

我不确定你为什么BH在你的xpath中有。

此 xpath 查询仅从您的示例中选择一个元素，我认为这是您想要的：

/SESSIONANALYSER/KER/MODES/NI/STATEINFORMATION[@TYPE='PREPAID']
    /INIT[@INVALIDINPUTRESPONSE='-2']
    /INPUT[@VALUE='LP6ACTIVATION']
于 2012-05-18T09:20:40.867 回答