Question

这就是我的代码：

case "Creator":
    br.Read();
    br.MoveToContent();  // gives the content of the role
    tbComposer.Text = br.Value;
    br.Read();
    br.MoveToContent();  // gives the content of the role
    tbConductor.Text = br.Value;
    br.Read();
    br.MoveToContent();  // gives the content of the role
    tbOrchestra.Text = br.Value;
    break;

这是工作代码:(感谢大家的意见......如果没有你，就不可能做到！）Spokane-Dude

                case "Creator":
                    br.MoveToFirstAttribute();
                    if (br.Value == "Composer") {
                        br.Read();
                        tbComposer.Text = br.Value;
                    }
                    if (br.Value == "Conductor") {
                        br.Read();
                        tbConductor.Text = br.Value;
                    }
                    if (br.Value == "Orchestra") {
                        br.Read();
                        tbOrchestra.Text = br.Value;
                    }
                    break;

这就是我的XML：

<ItemLookupResponse>
    <OperationRequest/>
    <Items>
        <Request/>
        <Item>
            <ItemAttributes>
                <Binding>Audio CD</Binding>
                <CatalogNumberList>
                    <CatalogNumberListElement>43850</CatalogNumberListElement>
                </CatalogNumberList>
                <Creator Role="Composer">Gioachino Rossini</Creator>
                <Creator Role="Conductor">Riccardo Chailly</Creator>
                <Creator Role="Orchestra">National Philharmonic Orchestra</Creator>
            </ItemAttributes>
        </Item>
    </Items>
</ItemLookupResponse>

我需要知道我是否正在阅读创作者角色=“作曲家”或创作者角色=“指挥”等元素

因此，使用XMLTextReader，我如何确定元素文本是什么？

Answer 1

直到它实际阅读才能实现。 XmlTextReader按顺序读取流。

所以反过来说：当你到达属性Role="Composer"时，你可以知道你有什么元素。

考虑使用XPath，LINQ-To-XML或类似的：http://msdn.microsoft.com/en-us/library/bb156083.aspx

node.XPathSelectElement(@"*/Creator[@Role=""Conductor""]");

对于XmlTextReader，在某处有一个XPathReader组件：

What ever happened to XPathReader

Answer 2

这个样本怎么样？我希望它对你有用

   static void Main(string[] args)
    {

        string xmlStr = "<?xml version=\"1.0\" encoding=\"utf-8\" ?><Creators><Creator Role=\"Composer\">Gioachino Rossini</Creator><Creator Role=\"Conductor\">Riccardo Chailly</Creator><Creator Role=\"Orchestra\">National Philharmonic Orchestra</Creator></Creators>";
        using (XmlReader xmlReader = XmlTextReader.Create(new StringReader(xmlStr)))
        {
            xmlReader.MoveToContent();
            xmlReader.ReadStartElement("Creators" , "");
            SomeMethod("Composer", xmlReader);
            SomeMethod("Conductor", xmlReader);
            SomeMethod("Orchestra", xmlReader);
        }

        Console.WriteLine("........");
        Console.Read();
    }

    static void SomeMethod(string role, XmlReader xmlReader)
    {
        xmlReader.MoveToAttribute("Role");

        switch (role)
        {
            case "Composer":
                {
                    xmlReader.MoveToContent();
                    Console.WriteLine(string.Format("Composer:{0}", xmlReader.ReadElementContentAsString()));

                } break;
            case "Conductor":
                {
                    xmlReader.MoveToContent();
                    Console.WriteLine(string.Format("Conductor:{0}", xmlReader.ReadElementContentAsString()));

                } break;
            case "Orchestra":
                {
                    xmlReader.MoveToContent();
                    Console.WriteLine(string.Format("Orchestra:{0}", xmlReader.ReadElementContentAsString()));

                } break;

            default: break;
        }
    }

使用XMLTextReader，我怎么知道我在哪个元素？

2 个答案: