c# 解析Xml文件

c# Xml解析类和应用

 

这是面向对象的课程设计作业，就是自己写xml解析类并且完成由xml文件向图形的转化。

这里用了两种方法，第一种是c#自己提供的xml解析函数，第二种是自己的xml解析函数。

 

xml解析函数（原创）

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

 

namespace WindowsFormsApplication1

{

  public class xmlParser

    {

 

       string s = null;

        string temp;

       bool isnull = false;

       byte[] byteArray = new byte[1];

       Stack<TreeNode> nodeStack = new Stack<TreeNode>();

       List<string> contents = new List<string>();

       bool newline = false;

 

      public TreeNode xmlParse(string addr)

      {

          TreeNode elemNode = new TreeNode();

          FileStream f = new FileStream(addr, FileMode.Open, FileAccess.Read);

          

 

          while (isnull == false)

          {

               

               int i = f.Read(byteArray, 0, 1);

               temp =System.Text.Encoding.Default.GetString(byteArray);

               if (i < 1)

               {

                   isnull = true;

                   break;

               }

              if (temp == null)

               {

                   break;

               }

               if (newline == true &&temp == " ")

               {

                   continue;

               }

 

               if (temp == " " ||temp == "\r" || temp == ">" || temp == "\n")

               {

                   if (s.Contains('<')&& !s.Contains('/'))

                   {

                       //元素 1

                       string[] t =s.Split('<');

 

                       TreeNode tn1 = newTreeNode();

                       tn1.Text = t[1];

                       tn1.Tag = 1;

                       if (nodeStack.Count >0)

                       {

                          nodeStack.Peek().Nodes.Add(tn1);

                       }

                       else

                       {

                           elemNode = tn1;

                       }

                       nodeStack.Push(tn1);

                       s = "";

 

                   }

                  

                   else if (s.Contains('/'))

                   {

                       //文本节点 3

                       string[] t =s.Split('/');

                       string[] t1 =t[0].Split('<');

 

                       if (t1[0] !="")

                       {

                           contents.Add(t1[0]);

                           TreeNode tn3 = newTreeNode();

                           tn3.Text = t1[0];

                           tn3.Tag = 3;

                          nodeStack.Peek().Nodes.Add(tn3);

                       }

                       s = "";nodeStack.Pop();

                   }

                   else if (temp =="\n")

                   {

                       s = "";

                       newline = true;

                   }

 

                   else if (temp =="\r" || s == null || s == " ")

                   {

                       s = "";

                   }

                   else

                   {

                       //属性节点 2

                       string s2 = s.Insert(0,"@");

                       contents.Add(s2);

 

                       TreeNode tn2 = newTreeNode();

                       tn2.Text = s2;

                       tn2.Tag = 2;

                      nodeStack.Peek().Nodes.Add(tn2);

                       s = "";

                       s2 = "";

                   }     

               }

              

               else

               {

                   s += temp;

                   newline = false;

               }

          }

 

          isnull = false;

          f.Close();

          return elemNode;

      }

    }

}

思路：这里只用了一个栈，基本思路就是不断的一个字符一个字符读取，当遇到特殊字符的时候，判断，如果是节点例如<A>那么就进栈作为父节点，然后所有的属性都算成是子节点，如果在</a>之前又有了新的节点，那么也是<a>的子节点，以此一直向下读取，然后写入到树结构中，这里的树结构利用的是c#自带的。

 

然后就是绘图，程序结构是

每个节点都是一个类，并继承treenode类，然后有个节点管理类主要负责节点的管理，保存所有的节点，对位置，内容等进行管理。

 

还有个画图类，和画图管理类，主要是对picturebox中的画图进行管理，绘制节点管理中的所有节点。

然后就完成了。】

 

应用程序源代码稍后传上来。下载地址：http://download.csdn.net/detail/bjut_yue/5276322

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