DynamicXMLNode C#

本文关键字：DynamicXMLNode | 更新日期: 2023-09-27 18:06:04

我想使用dynamicXMLNode从集合(List对象)生成xml文档。需要创建的XML具有重复的元素，如元素。在创建DynamicXMLNode时，不能创建该元素两次。它覆盖了前一个节点的值。下面显示一些代码。如有任何建议，我将不胜感激。

<FileContents>
<FileContent>
<Metadata>
<Country>UK</Country>
<CounterPartyType>Legal</CounterPartyType>
</Metadata>
</FileContent>
<FileContent>
<Metadata>
<Country>USA</Country>
<CounterPartyType>Legal</CounterPartyType>
</Metadata>
</FileContent>
//Node 1
dynamic topNode = new DynamicXMLNode("FileContents");
topNode.FileContent = new DynamicXMLNode("FileContent");
topNode.FileContent.Metadata = new DynamicXMLNode("MetaData");
topNode.FileContent.Metadata.Country= "UK";
topNode.FileContent.Metadata.CounterpartyType= "Legal";
//Node 2
topNode.FileContent = new DynamicXMLNode("FileContent1");
topNode.FileContent.Metadata = new DynamicXMLNode("MetaData1");
//This is overriding the values set in the prev node. However if I do 
topNode.FileContent1 then my xml element is named as FileContent1 which is not what I want. I beleieve this must be something I need to tweak in the DynamicXMLNode class.

公共类DynamicXMLNode: DynamicObject{XElement _node;

    public DynamicXMLNode(XElement node)
    {
        this._node = node;
    }
    public DynamicXMLNode(string name)
    {
        _node = new XElement(name);
    }
    public static DynamicXMLNode Parse(string text)
    {
        return new DynamicXMLNode(XElement.Parse(text));
    }
    public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
    {
        Type xmlType = typeof(XElement);
        try
        {                
            List<object> newargs = null;
            var argtypes = args.Select(x => x.GetType()); 
            if (argtypes.Contains(typeof(DynamicXMLNode)) || argtypes.Contains(typeof(DynamicXMLNode[])))
            {
                newargs = new List<object>();
                foreach (var arg in args)
                {
                    if (arg.GetType() == typeof(DynamicXMLNode))
                    {
                        newargs.Add(((DynamicXMLNode)arg)._node);
                    }
                    else if (arg.GetType() == typeof(DynamicXMLNode[]))
                    {                           
                        newargs.Add(((DynamicXMLNode[])arg).Select(x => (x)._node));
                    }
                    else
                    {
                        newargs.Add(arg);
                    }
                }
            }
            result = xmlType.InvokeMember(
                      binder.Name,
                      BindingFlags.InvokeMethod |
                      BindingFlags.Public |
                      BindingFlags.Instance,
                      null, _node, newargs == null ? args : newargs.ToArray());
            if (result != null && typeof(IEnumerable<XElement>).IsAssignableFrom(result.GetType()))
            {
                result = ((IEnumerable<XElement>)result).Select(x => new DynamicXMLNode(x));
            }
            return true;
        }
        catch
        {
            result = null;
            return false;
        }
    }

    public override bool TrySetMember(SetMemberBinder binder, object value)
    {
        XElement setNode = _node.Element(binder.Name);
        if (setNode != null)
            setNode.SetValue(value);
        else
        {
            if (value.GetType() == typeof(DynamicXMLNode))
                _node.Add(new XElement(binder.Name));
            else
                _node.Add(new XElement(binder.Name, value));
        }
        return true;
    }
    public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
        XElement getNode = _node.Element(binder.Name);
        if (getNode != null)
        {
            result = new DynamicXMLNode(getNode);
            return true;
        }
        else
        {
            result = null;
            return false;
        }
    }
    public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
    {
        string name = (string)indexes[0];
        result = _node.Attribute(name); //maybe check for null here
        return true;
    }
    public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
    {
        string name = (string)indexes[0];
        _node.SetAttributeValue(name, value);
        return true;
    }
}

DynamicXMLNode C#

尝试XML Linq

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //<FileContents>
            //<FileContent>
            //<Metadata>
            //<Country>UK</Country>
            //<CounterPartyType>Legal</CounterPartyType>
            //</Metadata>
            //</FileContent>
            //<FileContent>
            //<Metadata>
            //<Country>USA</Country>
            //<CounterPartyType>Legal</CounterPartyType>
            //</Metadata>
            //</FileContent
            XElement filecontents = new XElement("FileContents");
            XElement filecontent = null;
            XElement metadata = null;
            filecontent = new XElement("FileContent");
            filecontents.Add(filecontent);
            metadata = new XElement("Metadata");
            filecontent.Add(metadata);
            metadata.Add(new XElement("Country","UK"));
            metadata.Add(new XElement("CounterPartyType","Legal"));

            filecontent = new XElement("FileContent");
            filecontents.Add(filecontent);
            metadata = new XElement("Metadata");
            filecontent.Add(metadata);
            metadata.Add(new XElement("Country", "USA"));
            metadata.Add(new XElement("CounterPartyType", "Legal"));
        }
    }
}