c # xml file operation (read and write)

According to project requirements, we need to record user activity traces, the next time the user login operation with a file, the page displayed to the user on the user's track once performed, we consider the history of the user's written into the xml file.

Xml data structures stored in:

 

XML operations categories:

  1 using System;
  2 using System.Collections.Generic;
  3 using System.IO;
  4 using System.Linq;
  5 using System.Text;
  6 using System.Threading.Tasks;
  7 using System.Xml;
  8 
  9 namespace iImgEnh.UI.AuthenticateImage.AuthImageMethods.Model
 10 {
 11     public class VideoContinuityReadWriteRecord
 12     {
 13         #region 属性
 14         /// <summary>
 15         /// storing xml content folder under the file name
 16          ///  </ Summary> 
. 17          Private  String DicFileName = " Resources / Xmlfile.xml " ;
 18 is  
. 19          #endregion 
20 is  
21 is          #region write xml
 22 is          ///  < Summary> 
23 is          ///  
24          ///  </ Summary> 
25          ///  <param name = "File"> </ param> 
26 is          ///  <param name = "Content"> </ param> 
27          ///  <param name = "dateTimeStr"> </ param>
 28         public void WriteDoc(stringFile, String Content, String dateTimeStr)
 29          {
 30              String SavePath = Path.Combine (Directory.GetCurrentDirectory (), " Resources " );
 31 is  
32              // determines whether there is a folder 
33 is              var DirectoryPath = Path.GetDirectoryName (SavePath);   / / Get the path to the folder where 
34 is              IF (! Directory.Exists (SavePath))
 35              {
 36                  Directory.CreateDirectory (SavePath);   // create a folder 
37              }
 38             DOC = the XmlDocument new new the XmlDocument ();
 39              IF (the File.Exists (DicFileName))
 40              {
 41 is                  // If the file exists to load the XML 
42 is                  doc.Load (DicFileName);
 43 is                  // root file obtained 
44 is                  an XmlNodeList XNL = DOC. the SelectNodes ( " / the Positions / the Position / Item " );
 45                  IF (xnl.Count < . 1 )
 46 is                  {
 47                     CreateDoc (File, Content, dateTimeStr);
 48                  }
 49                  the else 
50                 {
 51                     XmlNode PNode = null;
 52                     var isHave = false;
 53                     foreach (XmlNode item in xnl)
 54                     {
 55                         PNode = item.ParentNode;
 56                         var name = item.Attributes["Name"].Value;
 57                         //var text = item.Attributes["Content"].Value;
 58                         if (name == file)
 59                         {
 60                             isHave = true;
 61                             item.Attributes["Content"].Value = content;
 62                             item.Attributes["Time"].Value = dateTimeStr;
 63                             break;
 64                         }
 65                     }
 66                     if (!isHave)
 67                     {
 68                         var en = doc.DocumentElement;
 69                         XmlElement name1 = doc.CreateElement("Item");
 70                         name1.SetAttribute("Name", file);
 71                         name1.SetAttribute("Content", content);
 72                         name1.SetAttribute("Time", dateTimeStr);
 73                         PNode.AppendChild(name1);
 74 
 75                         if (xnl.Count > 20)
 76                         {
 77                             PNode.RemoveChild(xnl[0]);
 78                         }
 79 
 80                     }
 81                 }
 82                 doc.Save(DicFileName);
 83             }
 84             else
 85             {
 86                 CreateDoc(file, content,dateTimeStr);
 87             }
 88         }
 89 
 90         /// <summary>
 91         /// 读取XML文件
 92         /// </summary>
 93         /// <param name = "File"> </ param> 
94          ///  <Returns> </ Returns> 
95          public RecordInfo ReadDoc ( String File)
 96          {
 97              RecordInfo info = new new RecordInfo ();
 98              the XmlDocument DOC = new new the XmlDocument () ;
 99              IF (the File.Exists (DicFileName))
 100              {
 101                  // If the file exists to load the XML 
102                  doc.Load (DicFileName);
 103                  // get the root file 
104                  an XmlNodeList XNL = doc.SelectNodes ( "/Positions/Position/Item");
105                 if (xnl.Count > 0)
106                 {
107                     foreach (XmlNode item in xnl)
108                     {
109                         if (item.Attributes["Name"].Value == file)
110                         {
111                             info.Position = item.Attributes["Content"].Value;
112                             info.Time = item.Attributes["Time"].Value;
113                         }
114                     }
115                 }
116             }
117             return info;
118         }
119 
120         /// <summary>
121         /// 创建XML文件
122         /// </summary>
123         /// <param name="file"></param>
124         /// <param name="content"></param>
125         /// <param name="dateTimeStr"></param>
126         private void CreateDoc(string file, stringContent, String dateTimeStr)
 127          {
 128              the XmlDocument doc = new new the XmlDocument ();
 129              // . 3, creating a first description line, and added to the document doc 
130.              the XmlDeclaration On Dec = doc.CreateXmlDeclaration ( " 1.0 " , " UTF- . 8 " , null );
 131 is              doc.AppendChild (On Dec);
 132              // . 4, to create a root node 
133              the XmlElement Books = doc.createElement ( " the Positions " );
 134              // root node added to the document 
135             doc.AppendChild (Books);
 136  
137              // . 5, to create a child node of the root node Books 
138              the XmlElement Book1 = doc.createElement ( " the Position " );
 139              // Add the book to the root node 
140              books.AppendChild (Book1);
 141              // 6, the child is added to Book1 
142              the XmlElement NAME1 = doc.createElement ( " Item " );
 143              name1.SetAttribute ( " the Name " , File);
 144              name1.SetAttribute ( " the Content " , Content);
145             name1.SetAttribute("Time", dateTimeStr);
146             book1.AppendChild(name1);
147 
148             doc.Save(DicFileName);
149         }
150 
151         #endregion
152     }
153 
154     public class RecordInfo
155     {
156         /// <summary>
157         /// 位置
158         /// </summary>
159         public string Position { get; set; }
160 
161          ///  <Summary> 
162          /// Time Format
 163          ///  </ Summary> 
164 is          public  String Time { GET ; SET ;}
 165      }
 166 }