最好的.net方法来创建XML文档

时间:2010-01-16 06:36:07

标签: c# .net xml

我试图找出编写XML文档的最佳方法。下面是我试图从我的ERP系统中提取数据的一个简单示例。我已阅读有关XMLWriter的内容,但我想我会看看是否还有其他更好的方法。任何建议都将不胜感激。

示例XML:

<?xml version="1.0"?>
<Orders>
  <Order OrderNumber="12345">
    <ItemNumber>0123993587</ItemNumber>
    <QTY>10</QTY>
    <WareHouse>PA019</WareHouse>
  </Order>
  <Order OrderNumber="12346">
    <ItemNumber>0123993587</ItemNumber>
    <QTY>9</QTY>
    <WareHouse>PA019</WareHouse>
  </Order>
  <Order OrderNumber="12347">
    <ItemNumber>0123993587</ItemNumber>
    <QTY>8</QTY>
    <WareHouse>PA019</WareHouse>
  </Order>
</Orders>

11 个答案:

答案 0 :(得分:27)

Josh的回答显示了在LINQ to XML中创建单个元素是多么容易......它没有显示如何创建多个元素也非常容易。假设您有一个名为List<Order>的{​​{1}} ...您可以像这样创建整个文档:

orders

LINQ to XML使构建XML非常容易。它也支持XML命名空间,这也非常简单。例如,如果您希望元素位于特定的命名空间中,则只需要:

var xml = new XElement("Orders",
    orders.Select(order =>
        new XElement("Order",
            new XAttribute("OrderNumber", order.OrderNumber),
            new XElement("ItemNumber", order.ItemNumber),
            new XElement("QTY", order.Quantity),
            new XElement("Warehouse", order.Warehouse)
        ));
);

LINQ to XML是我使用过的最好的XML API ...它也非常适合查询。

答案 1 :(得分:9)

我建议使用System.Xml.Linq.dll中包含XML DOM API的类,由于构造函数的设计方式,它允许轻松构建XML结构。尝试使用System.Xml类创建XML结构非常痛苦,因为您必须创建它们分离然后单独将它们添加到文档中。

XLinq与System.Xml的

Here's an example从头开始创建DOM。当您看到System.Xml示例时,您的眼睛会流血。

以下是一个快速示例,说明如何使用XLinq构建部分文档。

var xml = new XElement("Orders",
    new XElement("Order",
        new XAttribute("OrderNumber", 12345),
        new XElement("ItemNumber", "01234567"),
        new XElement("QTY", 10),
        new XElement("Warehouse", "PA019")
    )
);

提示虽然它有点不正统(虽然不比最近流行的一些语言屠宰更糟糕),但我偶尔使用C#的类型别名功能来进一步减少代码:< / p>

using XE = System.Xml.Linq.XElement;
using XA = System.Xml.Linq.XAttribute;
...
var xml = new XE("Orders",
    new XE("Order",
        new XA("OrderNumber", 12345),
        new XA("ItemNumber", "01234567"),
        new XA("QTY", 10),
        new XA("Warehouse", "PA019")
    )
);

答案 2 :(得分:4)

这个怎么样:创建一个“Order”类和一个“Orders”,然后将它们序列化为XML - 对我来说似乎比从手工创建XML更容易....

既然你说你正在从你的ERP中提取数据,你可能已经有了“订单”的对象和类等等 - 也许只需要在你的类上添加一些[XmlElement]属性就可以了去吧!

using System;
using System.Collections.Generic;
using System.Xml.Serialization;

namespace XmlLinqTest
{
    [Serializable]
    [XmlRoot(Namespace = "")]
    public class Orders
    {
        private List<Order> _orders = new List<Order>();

        /// <remarks/>
        [XmlElement("Order")]
        public List<Order> OrderList
        {
            get { return _orders; }
        }
    }

    /// <remarks/>
    [Serializable]
    public class Order
    {
        /// <remarks/>
        [XmlElement]
        public string ItemNumber { get; set; }

        [XmlElement]
        public int QTY { get; set; }

        /// <remarks/>
        [XmlElement]
        public string WareHouse { get; set; }

        /// <remarks/>
        [XmlAttribute]
        public string OrderNumber { get; set; }
    }
}

并在您的主应用程序中使用以下内容:

Orders orders = new Orders();

Order work = new Order() { ItemNumber = "0123993587", OrderNumber = "12345", QTY = 10, WareHouse = "PA019" };
orders.OrderList.Add(work);

work = new Order() { ItemNumber = "0123993587", OrderNumber = "12346", QTY = 9, WareHouse = "PA019" };
orders.OrderList.Add(work);

work = new Order() { ItemNumber = "0123993587", OrderNumber = "12347", QTY = 8, WareHouse = "PA019" };
orders.OrderList.Add(work);

XmlSerializer ser = new XmlSerializer(typeof(Orders));

using(StreamWriter wr = new StreamWriter(@"D:\testoutput.xml", false, Encoding.UTF8))
{
    ser.Serialize(wr, orders);
}

使用对象然后将它们序列化到磁盘似乎比摆弄XDocument和其他API要容易得多。

答案 3 :(得分:2)

如果您的用例很简单,那么没有什么比XmlTextWriter更简单,更容易使用了。也就是说,一种替代方法是使用XmlDocument对象来创建和附加所有节点。但是,如果您从头开始创建文档而不是操作文档,我认为编写和维护使用XmlTextWriter的代码更容易。使用XmlTextWriter应该非常简单:

        StringBuilder output = new StringBuilder();
        XmlWriter writer = XmlWriter.Create(output);
        writer.WriteProcessingInstruction("xml", "version=\"1.0\"");
        writer.WriteStartElement("Orders");
        //...start loop...
        writer.WriteStartElement("Order");
        writer.WriteAttributeString("OrderNumber", "12345");
        writer.WriteElementString("ItemNumber", "0123993587");
        writer.WriteElementString("QTY", "10");
        writer.WriteElementString("WareHouse", "PA019");
        writer.WriteEndElement();
        //...loop...
        writer.WriteEndElement();
        writer.Close();

答案 4 :(得分:1)

有一种名为XCST的新语言编译为C#。

<c:template name='c:initial-template' expand-text='yes'>
   <c:param name='orders' as='IEnumerable&lt;Order>'/>

   <Orders>
      <c:for-each name='order' in='orders'>
         <Order OrderNumber='{order.Number}'>
            <ItemNumber>{order.ItemNumber}</ItemNumber>
            <QTY>{order.Quantity}</QTY>
            <WareHouse>{order.WareHouse}</WareHouse>
         </Order>
      </c:for-each>
   </Orders>
</c:template>

答案 5 :(得分:0)

我必须创建以下XML文档,其中一部分参数化。

<?xml version="1.0" encoding="utf-8"?>
<wap-provisioningdoc>
  <characteristic type="BOOTSTRAP">
    <parm name="NAME" value="SYNCSETTINGS" />
  </characteristic>
  <characteristic type="APPLICATION">
    <parm name="APPID" value="w5" />
    <parm name="TO-NAPID" value="INTERNET" />
    <parm name="NAME" value="SYNCSETTINGS" />
    <parm name="ADDR" value="http://syncserver/sync" />
    <characteristic type="RESOURCE">
      <parm name="URI" value="pb" />
      <parm name="NAME" value="Contacts DB" />
      <parm name="AACCEPT" value="text/x-vcard" />
    </characteristic>
    <characteristic type="RESOURCE">
      <parm name="URI" value="cal" />
      <parm name="NAME" value="Calendar DB" />
      <parm name="AACCEPT" value="text/x-vcalendar" />
    </characteristic>
    <characteristic type="RESOURCE">
      <parm name="URI" value="notes" />
      <parm name="NAME" value="Notes DB" />
      <parm name="AACCEPT" value="text/plain" />
    </characteristic>
    <characteristic type="APPAUTH">
      <parm name="AAUTHNAME" value="username" />
      <parm name="AAUTHSECRET" value="password" />
    </characteristic>
  </characteristic>
</wap-provisioningdoc>

这是我用单一LINQ语句执行此操作的代码。

请注意,使用LINQ创建上面的XML文档并将其保存到XML文件会保留XML文档格式并保留换行符和回车符,以使文档正确列表。

public string CreateOTAXmlFile(string Username, string Password)
    {
        var ota = new XDocument(
                    new XElement("wap-provisioningdoc",
                        new XElement("characteristic", new XAttribute("type", "BOOTSTRAP"),
                            new XElement("parm", new XAttribute("name", "NAME"), new XAttribute("value", "SYNCSETTINGS"))
                                    ),
                        new XElement("characteristic", new XAttribute("type", "APPLICATION"),
                            new XElement("parm", new XAttribute("name", "APPID"), new XAttribute("value", "w5")),
                            new XElement("parm", new XAttribute("name", "TO-NAPID"), new XAttribute("value", "INTERNET")),
                            new XElement("parm", new XAttribute("name", "NAME"), new XAttribute("value", "SYNCSETTINGS")),
                            new XElement("parm", new XAttribute("name", "ADDR"), new XAttribute("value", "http://syncserver/sync")),
                            new XElement("characteristic", new XAttribute("type", "RESOURCE"),
                                new XElement("parm", new XAttribute("name", "URI"), new XAttribute("value", "pb")),
                                new XElement("parm", new XAttribute("name", "NAME"), new XAttribute("value", "Contacts DB")),
                                new XElement("parm", new XAttribute("name", "AACCEPT"), new XAttribute("value", "text/x-vcard"))
                                        ),
                            new XElement("characteristic", new XAttribute("type", "RESOURCE"),
                                new XElement("parm", new XAttribute("name", "URI"), new XAttribute("value", "cal")),
                                new XElement("parm", new XAttribute("name", "NAME"), new XAttribute("value", "Calendar DB")),
                                new XElement("parm", new XAttribute("name", "AACCEPT"), new XAttribute("value", "text/x-vcalendar"))
                                        ),
                            new XElement("characteristic", new XAttribute("type", "RESOURCE"),
                                new XElement("parm", new XAttribute("name", "URI"), new XAttribute("value", "notes")),
                                new XElement("parm", new XAttribute("name", "NAME"), new XAttribute("value", "Notes DB")),
                                new XElement("parm", new XAttribute("name", "AACCEPT"), new XAttribute("value", "text/plain"))
                                        ),
                            new XElement("characteristic", new XAttribute("type", "APPAUTH"),
                                new XElement("parm", new XAttribute("name", "AAUTHNAME"), new XAttribute("value", Username)),
                                new XElement("parm", new XAttribute("name", "AAUTHSECRET"), new XAttribute("value", Password))
                                        )
                                    )
                                )
                            );

        ota.Save(Server.MapPath("~/OTA/") + Username + ".xml");
        return (ota.ToString());

    }

答案 6 :(得分:0)

// Create the xml document containe
XmlDocument doc = new XmlDocument();// Create the XML Declaration, and append it to XML document
XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", null, null);
doc.AppendChild(dec);// Create the root element
XmlElement root = doc.CreateElement("Library");
doc.AppendChild(root);
// Create Books
// Note that to set the text inside the element,
// you use .InnerText instead of .Value (which will throw an exception).
// You use SetAttribute to set attribute
XmlElement book = doc.CreateElement("Book");
book.SetAttribute("BookType", "Hardcover");
XmlElement title = doc.CreateElement("Title");
title.InnerText = "Door Number Three";
XmlElement author = doc.CreateElement("Author");
author.InnerText = "O'Leary, Patrick";
book.AppendChild(title);
book.AppendChild(author);
root.AppendChild(book);
book = doc.CreateElement("Book");
book.SetAttribute("BookType", "Paperback");
title = doc.CreateElement("Title");
title.InnerText = "Lord of Light";
author = doc.CreateElement("Author");
author.InnerText = "Zelanzy, Roger";
book.AppendChild(title);
book.AppendChild(author);
root.AppendChild(book);
string xmlOutput = doc.OuterXml;
The same code but using an XMLWriter to a memory stream.

XmlWriterSettings wSettings = new XmlWriterSettings();
wSettings.Indent = true;
MemoryStream ms = new MemoryStream();
XmlWriter xw = XmlWriter.Create(ms, wSettings);// Write Declaration
xw.WriteStartDocument();
// Write the root node
xw.WriteStartElement("Library");
// Write the books and the book elements
xw.WriteStartElement("Book");
xw.WriteStartAttribute("BookType");
xw.WriteString("Hardback");
xw.WriteEndAttribute();
xw.WriteStartElement("Title");
xw.WriteString("Door Number Three");
xw.WriteEndElement();
xw.WriteStartElement("Author");
xw.WriteString("O'Leary, Patrick");
xw.WriteEndElement();
xw.WriteEndElement();
// Write another book
xw.WriteStartElement("Book");
xw.WriteStartAttribute("BookType");
xw.WriteString("Paperback");
xw.WriteEndAttribute();
xw.WriteStartElement("Title");
xw.WriteString("Lord of Light");
xw.WriteEndElement();
xw.WriteStartElement("Author");
xw.WriteString("Zelanzy, Roger");
xw.WriteEndElement();
xw.WriteEndElement();
// Close the document
xw.WriteEndDocument();
// Flush the write
xw.Flush();
Byte[] buffer = new Byte[ms.Length];
buffer = ms.ToArray();
string xmlOutput = System.Text.Encoding.UTF8.GetString(buffer);

答案 7 :(得分:0)

如果您不想(或不能)使用LINQ to XML,既不要复制Order类以包含XML序列化,也认为XmlWriter过于冗长,你可以使用简单的经典XmlDocument类:

// consider Order class that data structure you receive from your ERP system
List<Order> orders = YourERP.GetOrders();
XmlDocument xml = new XmlDocument();
xml.AppendChild(xml.CreateElement("Orders"));
foreach (Order order in orders)
{
    XmlElement item = xml.CreateElement("Order");
    item.SetAttribute("OrderNumber", order.OrderNumber);
    item.AppendChild(xml.CreateElement("ItemNumber")).Value = order.ItemNumber;
    item.AppendChild(xml.CreateElement("QTY"       )).Value = order.Quantity;
    item.AppendChild(xml.CreateElement("WareHouse" )).Value = order.WareHouse;
    xml.DocumentElement.AppendChild(item);
}

答案 8 :(得分:0)

这个帖子中有很多好的建议,但是没有提到过:定义ADO DataSet并使用ReadXmlWriteXml方法序列化/反序列化。这可以是一个非常简单和有吸引力的解决方案你的XML格式不是很合适,但它很接近。

答案 9 :(得分:0)

我发现它在很大程度上取决于原始数据的复杂程度。

如果您的数据在对象中组织得很好并且将其转储为XML就足够了,Linq非常冗长且功能强大。但是只要存在对象相互依赖关系,我就不会认为你想要使用Linq one-liner,因为这是调试和/或扩展的真正痛苦。

对于这些情况,我更喜欢使用XmlDocument,创建一个帮助方法以便于向元素添加属性(见下文),并在围绕XML创建块的foreach循环中使用Linq。

private void XAttr(ref XmlNode xn, string nodeName, string nodeValue)
{
    XmlAttribute result = xn.OwnerDocument.CreateAttribute(nodeName); 
    result.InnerText = nodeValue;
    xn.Attributes.Append(result);
}

答案 10 :(得分:-2)

您只需右键单击代码窗口,然后选择InsertSnippet  点击此链接

 Data-Xml.....>Xml>Xmlcreate

非常容易