c# - 如何使用 C# 序列化和反序列化 XML 文件中的数据？

Question

我正在使用 winforms 和 c# 将数据保存在 xml 文件中。我成功地将我的数据插入 xml 文件并将其显示在我的 winform 中，但问题是当我关闭并再次打开表单以再次保存另一个数据时，系统显示此消息:

"The process can't access to the file "xmlfile path" because it's being in use by another process"

我使用下面的代码:

类信息.cs:

     private string id_x;
           private string id_y;
           private string fname_x;
private string fname_y;
     public string ID_X
           {  
                  get { return id_x; }
                  set { id_x = value; }
           }

           public string ID_Y
           {
               get { return id_y; }
               set { id_y = value; }
           }

           public string Fname_X
           {
               get { return fname_x; }

               set { fname_x = value; }
           }  

  public string Fname_Y
           {
               get { return fname_y; }

               set { fname_y = value; }
           }  

类 saveXML.cs:

 public static void SaveData(object obj, string filename)
           {
               XmlSerializer sr = new XmlSerializer(obj.GetType());
               TextWriter writer = new StreamWriter(filename);
               sr.Serialize(writer,obj);
               writer.Close();
           }

在加载表单中:

     if (File.Exists("Patient_Data.xml"))
                {

                    XmlSerializer xs = new XmlSerializer(typeof(Information));
                    FileStream read = new FileStream("Patient_Data.xml", FileMode.Open, FileAccess.Read);
                    Information info = (Information)xs.Deserialize(read);


                    int x1 = Int32.Parse(info.ID_X);
                    int y1 = Int32.Parse(info.ID_Y);
                    int x2 = Int32.Parse(info.Fname_X);
   int y2 = Int32.Parse(info.Fname_Y);
                this.tlp_id.Location = new Point(x1, y1);
                this.tlp_fname.Location = new Point(x2, y2);

Answer 1

在您从中读取所有信息后，您不会关闭 FileStream。

FileStream read = new FileStream("Patient_Data.xml", FileMode.Open, FileAccess.Read);
Information info = (Information)xs.Deserialize(read);
read.Close();

确保在发生异常时也关闭 FileStream 的更好方法是使用 using 语句。

using(FileStream read = new FileStream("Patient_Data.xml", FileMode.Open, FileAccess.Read)) {
  Information info = (Information)xs.Deserialize(read);
}