C#通过XML文件对数据进行读写操作

C#通过XML文件对数据进行读写操作

1.定义将要操作的数据结构

public class EditPoint
	{
    
    
		public double x {
    
     get; set; }
		public double y {
    
     get; set; }
		public int ID {
    
     get; set; }
		public bool visible = false;

		public EditPoint(int id, double x, double y, bool visible)
		{
    
    
			this.x = x;
			this.y = y;
			this.ID = id;
			this.visible = visible;
		}
	}

	public class EditEdge
	{
    
    
		public int ID {
    
     get; set; }
		public int Src_ID {
    
     get; set; }
		public int Dst_ID {
    
     get; set; }
		public bool Directional = false;

		public EditEdge(int id, int src_id, int dst_id, bool directional)
		{
    
    
			this.ID = id;
			this.Src_ID = src_id;
			this.Dst_ID = dst_id;
			this.Directional = directional;
		}
	}

2.写操作

private void Save_XML()
{
    
    
	try
	{
    
    
	    //获取根节点对象
	    XDocument document = new XDocument();
	    XElement root = new XElement("map");
		//设置根节点属性
	    root.SetAttributeValue("generator", "map editor");
		root.SetAttributeValue("upload", "true");
		root.SetAttributeValue("version", "0.6");

		XElement vertex = new XElement("vertex");
	    vertex.SetAttributeValue("id", Global.editPoints[i].ID.ToString("0000"));
		vertex.SetAttributeValue("visible", Global.editPoints[i].visible.ToString());
		vertex.SetAttributeValue("x", Global.editPoints[i].x.ToString("0.0000000"));
		vertex.SetAttributeValue("y", Global.editPoints[i].y.ToString("0.0000000"));
		root.Add(vertex);

		XElement edge = new XElement("edge");
		edge.SetAttributeValue("id", Global.editEdges[j].ID.ToString("0000"));
		edge.SetAttributeValue("src_id", Global.editEdges[j].Src_ID.ToString("0000"));
		edge.SetAttributeValue("dst_id", Global.editEdges[j].Dst_ID.ToString("0000"));
		edge.SetAttributeValue("directional", Global.editEdges[j].Directional.ToString());
		root.Add(edge);

		System.Windows.Forms.SaveFileDialog sfd = new System.Windows.Forms.SaveFileDialog();
		sfd.Filter = "地图数据文件(*.xml)|*.xml|所有文件|*.*";//设置文件类型
		sfd.FileName = "road_map";//设置默认文件名
		sfd.DefaultExt = "xml";//设置默认格式（可以不设）
		sfd.AddExtension = true;//设置自动在文件名中添加扩展名

        //设置保存路径
		if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
		{
    
    
			root.Save(sfd.FileName);
		}
		else
		{
    
    
			root.Save(System.Environment.CurrentDirectory+ @"\road_map.xml");
		}
		catch (Exception)
		{
    
    
			return;
		}
	}

3.读操作

private void Read_XML()
{
    
    
	string szXMLFullPathName = System.Environment.CurrentDirectory+ @"\road_map.xml";
	if (File.Exists(szXMLFullPathName))
	{
    
    
		载入路网数据
		//将XML文件加载进来
		XDocument document = XDocument.Load(szXMLFullPathName);
		//获取到XML的根元素进行操作
		XElement root = document.Root;
		XElement vertex = new XElement("vertex");
		XElement edge = new XElement("edge");
	
		//获取根元素下的所有子元素
		IEnumerable<XElement> enumerable = root.Elements();
	
		foreach (XElement item in enumerable)
		{
    
    
			if (item.Name == "vertex")
			{
    
    
				EditPoint editPoint = new EditPoint(int.Parse(item.Attribute("id").Value), double.Parse(item.Attribute("x").Value), double.Parse(item.Attribute("y").Value), bool.Parse(item.Attribute("visible").Value));
			}
			else if (item.Name == "edge")
			{
    
    
				EditEdge editEdge = new EditEdge(int.Parse(item.Attribute("id").Value), int.Parse(item.Attribute("src_id").Value), int.Parse(item.Attribute("dst_id").Value), bool.Parse(item.Attribute("directional").Value));
			}
		}
}