Lecture – XML-Reflection-Inheritance Part 2

XML-Reflection-Inheritance Part 2

Prerequisites

Part of Topic – Creating a Single Table Database Object Storage

Lecture – XML-Reflection-Inheritance

next Lecture: Lecture – XML-Reflection-Inheritance Part 3

Summary

Topics Covered in this Video;

-Recap of Part 1
-XML Representation of SamplePropertiesInherited
-btnGet_Click
-getPropertyFromXml
-XDocument
-System.Xml.Linq
-try – catch
-lblValue
-Breakpoint
-PropertyInfo

Video 

Reference Materials

Code for XMLPropertyObject

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Reflection;
using System.Xml.Linq;
namespace DatabaseSample1.App_Code
{
    interface IXmlPropertyObject<T>
    {
        string asXML();
        string getPropertyFromXml();
    }
    public class XmlPropertyObject
    {
        public string Name { get; set; }
        public string Description { get; set; }
        public string asXML()
        {
            string s = String.Empty;
            string fc = className();
            while (fc.Contains("."))
            {
                fc = fc.Substring(fc.IndexOf(".") + 1);
            }
            s += "<" + fc + ">\n";
            foreach (var property in this.GetType().GetProperties())
            {
                s += " <" + property.Name + ">";
                s += property.GetValue(this);
                s += "</" + property.Name + ">";
                s += "\n";
            }
            s += "</" + fc + ">";
            return s;
        }
        private string className()
        {
            string fc = this.GetType().ToString();
            while (fc.Contains("."))
            {
                fc = fc.Substring(fc.IndexOf(".") + 1);
            }
            return fc;
        }
        public string getPropertyFromXml(string property, string xml)
        {
            XDocument doc = XDocument.Parse(xml);
            // Gets the value fom XML
            try  {return doc.Root.Element(property).Value; }
            catch {return String.Empty; }
        }
        public void setPropertyFromXml(string property, string xml)
        {
            string value = getPropertyFromXml(property, xml);
            setProperty(property, value);
        }
        public void setProperty(string name, string value)
        {
            PropertyInfo pi = this.GetType().GetProperty(name, BindingFlags.Public | BindingFlags.Instance);
            if (null != pi && pi.CanWrite)
            {
                pi.SetValue(this, value, null);
            }
        }
    }
    public class SamplePropertiesInherited : XmlPropertyObject
    {
        public string Content { get; set;}
    }
} 

Code for Interface

       protected void btnGet_Click(object sender, EventArgs e)
        {
            SamplePropertiesInherited s = new SamplePropertiesInherited();
//            lblValue.Text = s.getPropertyFromXml(tbProperty.Text, tbResults.Text);
            s.setPropertyFromXml(tbProperty.Text, tbResults.Text);
            lblValue.Text = s.Name;
        } 

Additional Information

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