// Read and output every other node
int i=0;
while(reader.Read())
{
if (i % 2)
writer.WriteNode(reader, false);
i++;
}
// Close the root
writer.WriteEndElement();
// Close reader and writer
writer.Close();
reader.Close();
我的XmlTextReadWriter类并没有从XmlReader或者XmlWriter类中继承。取而代之的是另外两个类，一个是基于只读流(stream)的操作类,另一个是基于只写流的操作类。XmlTextReadWriter类的方法用Reader对象读数据，写入到Writer对象。为了适应不同的需求，内部的Reader和Writer 对象分别通过只读的Reader和Writer属性公开。图十一列出了该类的一些方法：
Figure 11 XmlTextReadWriter Class Methods
Method
Description
AddAttributeChange
Caches all the information needed to perform a change on a node attribute. All the changes cached through this method are processed during a successive call to WriteAttributes.
Read
Simple wrapper around the internal reader’s Read method.
WriteAttributes
Specialized version of the writer’s WriteAttributes method, writes out all the attributes for the given node, taking into account all the changes cached through the AddAttributeChange method.
WriteEndDocument
Terminates the current document in the writer and closes both the reader and the writer.
WriteStartDocument
Prepares the internal writer to output the document and add a default comment text and the standard XML prolog.
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