1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Xml;
6
7 namespace ZW.ClassLibrary
8 {
9 public class XmlHelpers
10 {
11 /// <summary>
12 /// XML文档
13 /// </summary>
14 XmlDocument xd = new XmlDocument();
15
16 /// <summary>
17 /// 从文件中获取XmlDocument对象
18 /// </summary>
19 /// <param name="file">xml文档</param>
20 /// <param name="type">文档类型</param>
21 public XmlHelpers(string file, string type)
22 {
23 if (type == "path")
24 {
25 XmlTextReader xr = new XmlTextReader(file);
26 xd.Load(xr);
27 xr.Close();
28 }
29
30 if (type == "text")
31 {
32 xd.LoadXml(file);
33 }
34 }
35
36 /// <summary>
37 /// 获取第一个匹配节点的属性值
38 /// </summary>
39 /// <param name="nodePath"></param>
40 /// <param name="attrName"></param>
41 /// <returns></returns>
42 public string GetAttribute(string nodePath, string attrName)
43 {
44 XmlNode xn = xd.SelectSingleNode(nodePath);
45 if (xn == null) //检测节点是否存在
46 {
47 return "";
48 }
49 if (xn.Attributes[attrName] == null) //检测属性是否存在
50 {
51 return "";
52 }
53
54 return xn.Attributes[attrName].Value;
55 }
56
57 /// <summary>
58 /// 获取某个节点
59 /// </summary>
60 /// <param name="nodePath"></param>
61 /// <returns></returns>
62 public XmlNode GetNode(string nodePath)
63 {
64 XmlNode xn = xd.SelectSingleNode(nodePath);
65 return xn;
66 }
67
68 /// <summary>
69 /// 获取某个节点子集合指定属性值的节点
70 /// </summary>
71 /// <param name="nodePath">父节点</param>
72 /// <returns></returns>
73 public XmlNode GetNode(string nodePath, string attrName, string attrValue)
74 {
75 XmlNodeList xl = GetChildNode(nodePath);
76 if (xl != null)
77 {
78 foreach (XmlNode node in xl)
79 {
80 if (node.Attributes[attrName] != null) //检测属性是否存在
81 {
82 if (node.Attributes[attrName].Value.Trim() == attrValue)
83 {
84 return node;
85 }
86 }
87 }
88 }
89 return null;
90 }
91
92 /// <summary>
93 /// 获取某个节点上的子节点
94 /// </summary>
95 /// <param name="nodePath"></param>
96 /// <returns></returns>
97 public XmlNodeList GetChildNode(string nodePath)
98 {
99 XmlNodeList xl = null;
100 XmlNode xn = xd.SelectSingleNode(nodePath);
101 if (xl != null)
102 {
103 xl = xd.ChildNodes;
104 }
105 return xl;
106 }
107 }
108 }
