使用XmlDocument创建XML文档及增加删除更新节点 xml增加节点

1. usingSystem;
2. usingSystem.Collections.Generic;
3. usingSystem.ComponentModel;
4. usingSystem.Data;
5. usingSystem.Drawing;
6. usingSystem.Text;
7. usingSystem.Windows.Forms;
8. usingSystem.Xml;
9. namespaceXMLDOMDemo
10. {
11. publicpartialclassForm1:Form
12. {
13. publicForm1()
14. {
15. InitializeComponent();
16. }
19. privatevoidbtnLoad_Click(objectsender,EventArgse)
20. {
21. XmlDocumentxmlDoc=newXmlDocument();
22. xmlDoc.Load("Books.xml");
23. MessageBox.Show(xmlDoc.InnerXml);
24. }
25. //创建文档
26. privatevoidbtnCreate_Click(objectsender,EventArgse)
27. {
28. XmlDocumentxmlDoc=newXmlDocument();
30. //建立Xml的定义声明
31. XmlDeclarationdec=xmlDoc.CreateXmlDeclaration("1.0","GB2312",null);
32. xmlDoc.AppendChild(dec);
34. //创建根节点
35. XmlElementroot=xmlDoc.CreateElement("Books");
36. xmlDoc.AppendChild(root);
39. XmlNodebook=xmlDoc.CreateElement("Book");
41. XmlElementtitle=xmlDoc.CreateElement("Title");
42. title.InnerText="SQLServer";
43. book.AppendChild(title);
45. XmlElementisbn=xmlDoc.CreateElement("ISBN");
46. isbn.InnerText="444444";
47. book.AppendChild(isbn);
49. XmlElementauthor=xmlDoc.CreateElement("Author");
50. author.InnerText="jia";
51. book.AppendChild(author);
53. XmlElementprice=xmlDoc.CreateElement("Price");
54. price.InnerText="120";
55. price.SetAttribute("Unit","___FCKpd___0quot;);
57. book.AppendChild(price);
58. root.AppendChild(book);
60. xmlDoc.Save("Books.xml");
61. }
63. privatevoidbtnInsert_Click(objectsender,EventArgse)
64. {
65. XmlDocumentxmlDoc=newXmlDocument();
66. xmlDoc.Load("Books.xml");
68. XmlNoderoot=xmlDoc.SelectSingleNode("Books");
70. XmlElementbook=xmlDoc.CreateElement("Book");
72. XmlElementtitle=xmlDoc.CreateElement("Title");
73. title.InnerText="XML";
74. book.AppendChild(title);
76. XmlElementisbn=xmlDoc.CreateElement("ISBN");
77. isbn.InnerText="333333";
78. book.AppendChild(isbn);
80. XmlElementauthor=xmlDoc.CreateElement("Author");
81. author.InnerText="snow";
82. book.AppendChild(author);
84. XmlElementprice=xmlDoc.CreateElement("Price");
85. price.InnerText="120";
86. price.SetAttribute("Unit","___FCKpd___0quot;);
88. book.AppendChild(price);
90. root.AppendChild(book);
92. xmlDoc.Save("Books.xml");
93. MessageBox.Show("数据已写入！");
94. }
96. privatevoidbtnUpdate_Click(objectsender,EventArgse)
97. {
98. XmlDocumentxmlDoc=newXmlDocument();
99. xmlDoc.Load("Books.xml");
101. //"//Book[@Unit="$"]"
102. //获取Books节点的所有子节点
103. XmlNodeListnodeList=xmlDoc.SelectSingleNode("Books//Book").ChildNodes;
105. //遍历所有子节点
106. foreach(XmlNodexninnodeList)
107. {
108. //将子节点类型转换为XmlElement类型
109. XmlElementxe=(XmlElement)xn;
110. if(xe.Name=="Author")
111. {
112. xe.InnerText="amandag";
113. }
115. if(xe.GetAttribute("Unit")=="___FCKpd___0quot;)
116. {
117. xe.SetAttribute("Unit","￥");
118. }
119. //break;
120. }
122. //XmlNodeListnodeList=xmlDoc.SelectNodes("Books//Book");
123. //foreach(XmlNodexninnodeList)
124. //{
125. //foreach(XmlNodexinxn.ChildNodes)
126. //{
127. ////将子节点类型转换为XmlElement类型
128. //XmlElementxe=(XmlElement)x;
129. //if(xe.Name=="Author")
130. //{
131. //xe.InnerText="amandag";
132. //}
134. //if(xe.GetAttribute("Unit")=="___FCKpd___0quot;)
135. //{
136. //xe.SetAttribute("Unit","￥");
137. //}
138. ////break;
139. //}
140. //}
141. xmlDoc.Save("Books.xml");
142. }
144. privatevoidbtnDelete_Click(objectsender,EventArgse)
145. {
146. XmlDocumentxmlDoc=newXmlDocument();
147. xmlDoc.Load("Books.xml");
149. XmlNodeListnodeList=xmlDoc.SelectSingleNode("Books//Book").ChildNodes;
151. //遍历所有子节点
152. foreach(XmlNodexninnodeList)
153. {
154. //将子节点类型转换为XmlElement类型
155. XmlElementxe=(XmlElement)xn;
156. if(xe.Name=="Author")
157. {
158. xe.RemoveAll();
159. }
161. if(xe.GetAttribute("Unit")=="￥")
162. {
163. xe.RemoveAttribute("Unit");
164. }
165. }
166. xmlDoc.Save("Books.xml");
167. }
168. }
169. }

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