如何在 C# 中从选定的 TreeView 节点读取特定字段

Question

我有一个声明为的树视图：

 <TreeView Name="OOB"
 <!-- etc., -->

还有一个 XML 文件（代码片段）：

Army>
<ArmyName>The Army of Northern Virginia</ArmyName>
 <Commander> 
     <CommanderName>The Emperor Napoleon</CommanderName>
     <CommanderLeadership>94</CommanderLeadership> 
        <Division>
            <DivisionCommanderName>Major General William T. Sherman</DivisionCommanderName>
            <DivisionCommanderLeadership>78</DivisionCommanderLeadership>
            <Unit>
                <UnitName>Chasseurs à Cheval Garde</UnitName>
                <UnitIcon>Cavalry.png</UnitIcon>
                <UnitType>Cavalry</UnitType>
                <UnitKStrength>3</UnitKStrength>
                <UnitStrength>456</UnitStrength>
                <UnitQuality>94</UnitQuality>
                <UnitMorale>72</UnitMorale>
                <UnitLeadership>74</UnitLeadership>
                <UnitAmmunition>99</UnitAmmunition>
            </Unit>
            <Unit>
                <UnitName>Battery B 4th US Artillery</UnitName>
                <UnitIcon>Artillery.png</UnitIcon>
                <UnitType>Artillery</UnitType>
                <UnitKStrength>3</UnitKStrength>
                <UnitStrength>4456</UnitStrength>
                <UnitQuality>88</UnitQuality>
                <UnitMorale>65</UnitMorale>
                <UnitLeadership>82</UnitLeadership>
                <UnitAmmunition>25</UnitAmmunition>
            </Unit>
        </Division>
        <Division>
            <DivisionCommanderName>Spoons Butler</DivisionCommanderName>
            <DivisionCommanderLeadership>18</DivisionCommanderLeadership>
            <Unit>
                <UnitName>2nd Wisconsin Infantry</UnitName>
                <UnitIcon>Infantry.png</UnitIcon>
                <UnitType>Infantry</UnitType>
                <UnitKStrength>3</UnitKStrength>
                <UnitStrength>1456</UnitStrength>
                <UnitQuality>92</UnitQuality>
                <UnitMorale>48</UnitMorale>
                <UnitLeadership>87</UnitLeadership>
                <UnitAmmunition>25</UnitAmmunition>
            </Unit>
            <Unit>
                <UnitName>3rd Brigade Supply Train</UnitName>
                <UnitIcon>Supplies.png</UnitIcon>
                <UnitType>Supply</UnitType>
                <UnitKStrength>3</UnitKStrength>
                <UnitStrength>4256</UnitStrength>
                <UnitQuality>32</UnitQuality>
                <UnitMorale>36</UnitMorale>
                <UnitLeadership>25</UnitLeadership>
                <UnitAmmunition>3</UnitAmmunition>
            </Unit>

在树视图中单击的项存储在：

XmlNode selectedNode;
selectedNode = (XmlNode)OOB.SelectedItem;

我需要阅读字段

<DivisionCommanderLeadership>

在所选节点中。例如，如果上述示例，用户单击：

<DivisionCommanderName>Spoons Butler</DivisionCommanderName>

我想得到值： 18

我之前提出过这个问题，并被告知使用：

 XmlNode node = xmlFile.SelectSingleNode(".//DivisionCommanderLeadership");

不幸的是，这总是返回DivisionCommanderLeadership的第一个实例，而不是所选节点中的字段（即在上面的示例中，它为William T. Sherman少将返回"78"，而不是Spoons Butler返回"18"。

请帮忙一下？谢谢！

Answer 1

它必须是这样的：

XmlNode node = selectedNode.SelectSingleNode(".//DivisionCommanderLeadership");

您只想搜索选定的元素，而不是整个 xml。