xpath的问题啊，急救！~

Question

<configuration>
<Persister>
    <InfoPlat>
      <add key="DbServer" value="SqlServer" />
      <add key="ConnectionString" value="Persist Security Info=False;database=XFZDBdf;server=(local);user id=sa;pwd=;Connect Timeout=30"/>
      <add key="AutoLoadLevel" value="2" />
    </InfoPlat>
</configuration> string xpath =  "//configuration/Persister/InfoPlat/add[key='ConnectionString']"; 
XmlNode node = doc.SelectSingleNode(xpath);  返回为空，为什么不对？
要把key = 'ConnectionString'的节点读出，如何写 xpath？

Answer 1

<hibernate-configuration xmlns="urn:nhibernate-configuration-2.0">
  <session-factory name="NHibernate.Test">
    <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
    <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
    <property name="connection.connection_string">server=(local);database=XFZDB;uid=sa;pwd=</property>
    <property name="show_sql">false</property>
    <property name="dialect">NHibernate.Dialect.MsSql2000Dialect</property>
    <property name="use_outer_join">true</property>
    <property name="command_timeout">444</property>
    <property name="query.substitutions">true 1, false 0, yes 1, no 0</property>
  </session-factory>
  </hibernate-configuration>这段中如何找出节点： <property name="connection.connection_string">server=(local);database=XFZDB;uid=sa;pwd=</property>
？？？？？？？？？？？？？

Answer 2

string xpath =  "//configuration/Persister/InfoPlat/add[@key='ConnectionString']";
试试，没有环境，不能帮你测了

Answer 3

string xpath =  "//configuration/Persister/InfoPlat/add[@key='ConnectionString']/@value"; 取得节点key = "ConnectionString" 的value 属性

Answer 4

XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("x.xml"));
XmlNamespaceManager nm = new XmlNamespaceManager(doc.NameTable);
nm.AddNamespace("mxh", "urn:nhibernate-configuration-2.0");
string xpath = "/mxh:hibernate-configuration/mxh:session-factory/mxh:property[@name='connection.connection_string']";
XmlNode node = doc.SelectSingleNode(xpath,nm);
Response.Write(node.InnerText);

Answer 5

XmlDocument doc = new XmlDocument();
doc.Load(@"c:\x.xml");
XmlNamespaceManager nm = new XmlNamespaceManager(doc.NameTable);
nm.AddNamespace("mxh", "urn:nhibernate-configuration-2.0");
string xpath = "/mxh:hibernate-configuration/mxh:session-factory/mxh:property[@name='connection.connection_string']";
XmlNode node = doc.SelectSingleNode(xpath,nm);
MessageBox.Show(node.InnerText);

Answer 6

yan63的表达式是正确的， 孟子把第二个问题解答的很详细， 非常感谢！