Question

应用程序应不时将节点添加到Goals.xml文件。所以dynamic。添加节点的代码：

XmlWriterSettings settings=new XmlWriterSettings();  
settings.OmitXmlDeclaration= true;
settings.Indent = true;
settings.IndentChars = ("\t");

using (IsolatedStorageFile myIsolatedStorage = 
    IsolatedStorageFile.GetUserStoreForApplication())
using (IsolatedStorageFileStream stream = 
    myIsolatedStorage.OpenFile("Goals.xml", FileMode.Append))
{
    XmlSerializer serializer = new XmlSerializer(typeof(List<Goals>));
    using (XmlWriter xmlWriter = XmlWriter.Create(stream, settings))
    {
        serializer.Serialize(
            xmlWriter, 
            GenerateGoalsData(name, description, progress));
    }
}

和

private List<Goals> GenerateGoalsData(
    string name, 
    string description, 
    string progress)
{
    List<Goals> data = new List<Goals>();
    data.Add(new Goals() { 
            Name=name, 
            Description=description, 
            Progress=progress});
    return data;
}

我还有班级Goals。但它会产生错误的XML：

<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Goals>
        <Name>Jack</Name>
        <Description>lalala</Description>
        <Progress>97</Progress>
    </Goals>
</ArrayOfGoals>
<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Goals>
        <Name>Taaaaaa</Name>
        <Description>nanana</Description>
        <Progress>50</Progress>
    </Goals>
</ArrayOfGoals>

如何删除重复的XML：

</ArrayOfGoals>
<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">

所以XML看起来像那样：

<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Goals>
        <Name>Jack</Name>
        <Description>lalala</Description>
        <Progress>97</Progress>
    </Goals>
    <Goals>
        <Name>Taaaaaa</Name>
        <Description>nanana</Description>
        <Progress>50</Progress>
    </Goals>
</ArrayOfGoals>

或者如何在没有自动添加该字符串的情况下附加节点？

Answer 1

反序列化数据，添加新值并序列化。但使用FileMode.Create代替FileMode.Append

Answer 2

生成的文件是无效的XML，因此您无法将其直接用于反序列化为有效的Xml。

但它实际上是有效的“Xml片段”，可以用标准类读取：XmlReader可以在XmlReader.Create调用的XmlReaderSettings中指定ConformanceLevel.Frament时读取片段。我想你甚至可以直接从这样的读者反序列化类（不确定）。

旁注：阅读旧数据会更容易（但问题和错误更少），附加您需要的内容并序列化为整个文件。

Answer 3

XmlRootAttribute root = new XmlRootAttribute("Goals");     
XmlSerializer serializer = new XmlSerializer(typeof(List<Goals>), root);
XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
ns.Add(string.Empty, string.Empty);   
using (XmlWriter xmlWriter = XmlWriter.Create(stream, settings))
{
    serializer.Serialize(xmlWriter, GenerateGoalsData(name, description, progress), ns)
}

删除XML中的多个XML声明

3 个答案: