C#动态生成XML

通过C#动态生成图书信息XML文件（Books.xml），文件如下：

<?xml version="1.0" encoding="iso-8859-1"?>
<bookstore>

<book id="1" category="CHILDREN">
<title>Harry Potter</title>
<author>J K. Rowling</author>
<publishDate>2005-08-15</publishDate>
<price>29.99</price>
</book>

<book id="2" category="WEB">
<title>Learning XML</title>
<author>Erik T. Ray</author>
<publishDate>2003-10-18</publishDate>
<price>39.95</price>
</book>

</bookstore>

1、方法1：使用StringBuilder拼接XML

/// <summary>
/// 创建图书信息XML
/// </summary>
public void CreateBookXML(string fileName)
{
StringBuilder xmlResult = new StringBuilder("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
List<BookInfo> bookList = GetBookList();    //获取图书列表
if (bookList != null && bookList.Count > 0)
{
xmlResult.Append("<bookstore>");
foreach (BookInfo book in bookList)
{
xmlResult.AppendFormat("<book id=\"{0}\" category=\"{1}\">", book.BookId, book.Category);
xmlResult.AppendFormat("<title>{0}</title>", book.Title);
xmlResult.AppendFormat("<author>{0}</author>", book.Author);
xmlResult.AppendFormat("<publishDate>{0}</publishDate>", book.PublishDate.ToString("yyyy-MM-dd"));
xmlResult.AppendFormat("<price>{0}</price>", book.Price);
xmlResult.Append("</book>");
}
xmlResult.Append("</bookstore>");
}

//写入文件
try
{
//1.创建文件流
FileStream fileStream = new FileStream(fileName, FileMode.Create);
//2.创建写入器
StreamWriter streamWriter = new StreamWriter(fileStream);
//3.将内容写入文件
streamWriter.WriteLine(xmlResult);
//4.关闭写入器
streamWriter.Close();
//5.关闭文件流
fileStream.Close();
}
catch (Exception e)
{ }
}

2、 方法2：使用XmlTextWriter类创建XML

/// <summary>
/// 创建图书信息XML
/// </summary>
/// <param name="fileName"></param>
public void CreateBookXML(string fileName)
{
try
{
FileStream fileStream = new FileStream(fileName, FileMode.Create);
XmlTextWriter writer = new XmlTextWriter(fileStream, Encoding.UTF8);
List<BookInfo> bookList = GetBookList();    //获取图书列表
if (bookList != null && bookList.Count > 0)
{
writer.WriteStartDocument();
writer.WriteStartElement("bookstore");    //创建父节点
foreach (BookInfo book in bookList)
{
writer.WriteStartElement("book");    //创建子节点
writer.WriteAttributeString("id", book.BookId.ToString());    //添加属性
writer.WriteAttributeString("category", book.Category);
//图书名称节点
writer.WriteStartElement("title");
writer.WriteValue(book.Title);    //节点赋值
writer.WriteEndElement();
//图书作者节点
writer.WriteStartElement("author");
writer.WriteValue(book.Author);
writer.WriteEndElement();
//出版时间节点
writer.WriteStartElement("publishDate");
writer.WriteValue(book.PublishDate.ToString("yyyy-MM-dd"));
writer.WriteEndElement();
//销售价格节点
writer.WriteStartElement("price");
writer.WriteValue(book.Price);
writer.WriteEndElement();

writer.WriteEndElement();    //子节点结束
}
writer.WriteEndElement();    //父节点结束
}
writer.WriteEndDocument();
writer.Close();
fileStream.Close();
}
catch (Exception e)
{ }
}

XmlTextWriter类：表示提供快速、非缓存、只进方法的编写器，该方法生成包含 XML 数据的流或文件。

WriteStartDocument()方法：编写XML的声明。

WriteEndDocument()方法：关闭任何打开的元素或属性并将编写器重新设置为 Start 状态。

WriteStartElement(string localName)方法：创建一个节点的开始。

WriteAttributeString(string localName, string value)方法：给节点添加属性。

WriteValue(value)方法：给节点赋值。

3、其他代码

3.1 获取图书列表

/// <summary>
/// 获取图书列表
/// </summary>
/// <returns></returns>
public List<BookInfo> GetBookList()
{
List<BookInfo> bookList = new List<BookInfo>();
BookInfo book1 = new BookInfo() {
BookId = 1,
Category = "CHILDREN",
Title = "Harry Potter",
Author = "J K. Rowling",
PublishDate = new DateTime(2005,08,15),
Price = 29.99
};
bookList.Add(book1);
BookInfo book2 = new BookInfo()
{
BookId = 2,
Category = "WEB",
Title = "Learning XML",
Author = "Erik T. Ray",
PublishDate = new DateTime(2003,10,18),
Price = 39.95
};
bookList.Add(book2);
return bookList;
}

3.2 图书信息实体类

/// <summary>
/// 图书信息实体类
/// </summary>
public class BookInfo
{
public int BookId { set; get; }             //图书ID
public string Title { set; get; }           //图书名称
public string Category { set; get; }        //图书分类
public string Author { set; get; }          //图书作者
public DateTime PublishDate { set; get; }   //出版时间
public Double Price { set; get; }           //销售价格
}