项目：基于GIS操作语义的制图系统
需求：将点采集操作封装，写入和读取XML
1 xml结构设计
<?xml version="1.0" ecoding="UTF-8">
<Project ID="">
<CooperationMap ID="">
<Layer Name="" Type="">
<Point Operation=""></Point>
</Layer>
</CooperationMap>
</Project>
<工程 ID=“”>
<协作区域 ID="”>
<图层 名称="" 类型=“点”>
<点 操作类型="采集">坐标信息<点>
</图层>
</协作区域ID>
</工程ID>
2 消息体封装
public enum OperationEnum
{
Add,
Remove
}
class OperationInformation
{
public string Project { get; set; }
public string CooperationMap { get; set; }
public string LayerName { get; set; }
public string LayerType { get; set; }
public OperationEnum OperationEnum { get; set; }
public IPointCollection PointCollection;
}
几何(Geometry)属性用点集(IPointCollection)存储。
3 读写xml
写入xml
public void WriteXML(string absolutePath)
{
IPoint point = PointCollection.get_Point(0);
//创建节点
XElement project = new XElement("Project",
new XAttribute("ID", this.Project));
XElement cooperationMap = new XElement("CooperationMap",
new XAttribute("ID", this.CooperationMap));
XElement layer = new XElement("Layer",
new XAttribute("Name", this.LayerName),
new XAttribute("Type", this.LayerType));
XElement geometry = new XElement("Point",
new XAttribute("Operation", this.OperationEnum),
point.X," ", point.Y);
//添加节点
project.Add(cooperationMap);
cooperationMap.Add(layer);
layer.Add(geometry);
//保存
project.Save(absolutePath);
}
读取xml
public void ReadXML(string absolutePath)
{
//加载文档
XDocument document = XDocument.Load(absolutePath);
//获取节点
XElement project = document.Root;
XElement cooperationMap = project.Element("CooperationMap");
XElement layer = cooperationMap.Element("Layer");
XElement geometry = layer.Element("Point");
//获取参数
this.Project = project.Attribute("ID").Value;
this.CooperationMap = cooperationMap.Attribute("ID").Value;
this.LayerName = layer.Attribute("Name").Value;
this.LayerType = layer.Attribute("Type").Value;
//字符串转枚举
this.OperationEnum = (OperationEnum)Enum.Parse(typeof(OperationEnum), geometry.Attribute("Operation").Value);
string[] sPoint = geometry.Value.Split(' ');
IPoint point = new PointClass();
point.X = double.Parse(sPoint[0]);
point.Y = double.Parse(sPoint[1]);
this.PointCollection = new PolylineClass();
this.PointCollection.AddPoint(point);
}
引用
private void m_EngineEditEvent_OnSketchFinished()
{
string relatePath = Application.StartupPath + @"......Data789.xml";
string absolutePath = System.IO.Path.GetFullPath(relatePath);
OperationInformation operationInformation = new OperationInformation()
{
Project = "123",
CooperationMap = "123",
LayerName = axMapControl1.get_Layer(0).Name,
LayerType = "Point",
OperationEnum = OperationEnum.Add,
};
operationInformation.PointCollection = new PolygonClass();
operationInformation.PointCollection.AddPoint(point);
operationInformation.WriteXML(absolutePath);
}
private void 读取xmlToolStripMenuItem_Click(object sender, EventArgs e)
{
OperationInformation operationInformation = new OperationInformation();
string relatePath = Application.StartupPath + @"......Data789.xml";
string absolutePath = System.IO.Path.GetFullPath(relatePath);
operationInformation.ReadXML(absolutePath);
}