Question

我正在尝试阅读这个xml：

    <player>
      <id>10101</id>
      <name>Ricardo Ferreira Rodrigues</name>
      <shirtnumber>1</shirtnumber>
      <position>Guarda Redes</position>
      <realteam>5</realteam>
   </player>

我有这段代码：

    private async void LoadXml()
    {

        try
        {
            StorageFolder storageFolder = Package.Current.InstalledLocation;
            StorageFile storageFile = await storageFolder.GetFileAsync("/users/1101046102/xml/players.xml");

            string xml = await FileIO.ReadTextAsync(storageFile, Windows.Storage.Streams.UnicodeEncoding.Utf8);

            var doc = XDocument.Parse(xml);

            txtnome.Text = (string)doc.Root.Element("name");
            txtshirtnumber.Text = (string)doc.Root.Element("shirtnumber");
            txtposition.Text = (string)doc.Root.Element("position");  
        }

        catch (Exception ex)
        {
            XmlTextBlock.Text = ex.Message;
        }
    }

我得到的这个“价值不在预期的范围异常范围内”。有人可以告诉我为什么？

Answer 1

您的XML文档有两个根元素，都是“播放器”类型。

您的代码正在尝试将其加载到XDocument中，因此存在问题。

尝试将xml元素包装在容器节点中，如此...

<players>
    <player /> <!-- copied from above -->
    <player /> <!-- copied from above -->
</players>

然后，您需要重写查询以查看根元素的子节点。请注意，由于您有多个它们，您应该尝试将它们读入集合。

string xml = "<players>"
    + "    <player>"
    + "        <id>10101</id>"
    + "        <name>Ricardo Ferreira Rodrigues</name>"
    + "        <shirtnumber>1</shirtnumber>"
    + "        <position>Guarda Redes</position>"
    + "        <realteam>5</realteam>"
    + "    </player>"
    + "    <player>"
    + "        <id>10103</id>"
    + "        <name>Antonio Manuel</name>"
    + "        <shirtnumber>2</shirtnumber>"
    + "        <position>Defesa</position>"
    + "        <realteam>5</realteam>"
    + "    </player>"
    + "</players>";
        var doc = XDocument.Parse(xml);
        var rootNode = doc.Root;
        foreach (var child in rootNode.Descendants("player"))
        {
            // do something with the values of the child nodes here.
        }

请注意，在循环中将这些值分配给您拥有的文本控件是没有意义的，因为只有集合中的最后一个将以用户可以使用的方式写出来。

Answer 2

我想要的xml是：

        <player>
          <id>10101</id>
          <name>Ricardo Ferreira Rodrigues</name>
          <shirtnumber>1</shirtnumber>
          <position>Guarda Redes</position>
          <realteam>5</realteam>
       </player>
       <player>
          <id>10103</id>
          <name>Antonio Manuel</name>
          <shirtnumber>2</shirtnumber>
          <position>Defesa</position>
          <realteam>5</realteam>
      </player>

使用此xml我得到错误“值不在预期的范围异常范围内”。

    <TextBlock Name="txtnome" HorizontalAlignment="Left" Margin="178,275,0,0" TextWrapping="Wrap" VerticalAlignment="Top"/>
    <TextBlock Name="txtshirtnumber" HorizontalAlignment="Left" Margin="178,300,0,0" TextWrapping="Wrap" VerticalAlignment="Top"/>
    <TextBlock Name="XmlTextBlock" HorizontalAlignment="Left" Margin="178,250,0,0" TextWrapping="Wrap" VerticalAlignment="Top"/>
    <TextBlock Name="txtposition" HorizontalAlignment="Left" Margin="178,325,0,0" TextWrapping="Wrap" VerticalAlignment="Top"/>

这是我的文本块

值不在预期范围异常winrt内

2 个答案: