problem with Xml Serialization

1

i make a game guiding with Tutorial(C# Monogame RPG Made Easy Tutorial 3 - Xml Serialization)
and i have some error
`using System;
using System.Xml.Serialization;
using System.IO;

namespace CatRocks
{
    public class xmlManager<T>
    {
        public Type Type ; 

        public T Load(string path) {
            T instance;
            using (TextReader reader = new StreamReader(path))
            {

                XmlSerializer xml = new XmlSerializer(Type);
                instance = (T)xml.Deserialize(reader);
            }
            return instance;
        }
        public void Save(string path,object obj) {
            using (TextWriter writer = new StreamWriter(path))
            {
                XmlSerializer xml = new XmlSerializer(Type);
                xml.Serialize(writer, obj);
            }
        }
    }
}

and i have this error Severity Code Description Project File Line Suppression State
Error CS1503 Argument 1: cannot convert from ‘string’ to ‘System.IO.Stream’ CatRocks C:\Users\Pedro\documents\visual studio 2015\Projects\CatRocks\CatRocks\xmlManager.cs 13 Active
Error CS1503 Argument 1: cannot convert from ‘string’ to ‘System.IO.Stream’ CatRocks C:\Users\Pedro\documents\visual studio 2015\Projects\CatRocks\CatRocks\xmlManager.cs 22 Active
but in Tutorial don´t existe
i using the monogame 3.5
can someone help-me

2

Haven’t had time to find exactly the error you’ve made, but converted the class to static, removed the unnecessary Type-parameter (can be inferred) and tested it… works now; at least on my system…
here it is:

public static class XmlManager
{
    public static T Load<T>(string path)
    {
        using (TextReader reader = new StreamReader(path))
        {
            XmlSerializer xml = new XmlSerializer(typeof(T));
            return (T)xml.Deserialize(reader);
        }
    }

    public static void Save<T>(string path, T obj)
    {
        using (TextWriter writer = new StreamWriter(path))
        {
            XmlSerializer xml = new XmlSerializer(typeof(T));
            xml.Serialize(writer, obj);
        }
    }
}

Here’s how you’d use it:

[Test]
public void Ttt()
{
    XmlManager.Save("test.xml", "This is a test.");
    string s = XmlManager.Load<string>("test.xml");
    Console.Out.WriteLine(s);
}
3

the problem i think is becouse i using monogame project universal windows

4

Have you tried my code?
Does it fail as well?
At what line, what error and what was the command that failed (save or load)?
thx, cu.

5

yes and i have the same error
but when i create a new project using monogame desktop project the code work
this is the error i have in the project universal windows
public T Load(string path) {
T instance;
using (TextReader reader = new StreamReader(path)) //cannot convert from ‘string’ to ‘System.IO.Stream’
{

            XmlSerializer xml = new XmlSerializer(Type);
            instance = (T)xml.Deserialize(reader);
        }
        return instance;
    }
    public void Save(string path,object obj) {
        using (TextWriter writer = new StreamWriter(path)) //cannot convert from 'string' to 'System.IO.Stream' 
        {
            XmlSerializer xml = new XmlSerializer(Type);
            xml.Serialize(writer, obj);
        }
    }
6

Hmmm. Indeed… You’ve diagnosed it right.
Here’s a more detailed answer from StackOverflow describing your problem, and a solution.

Seems that you’re not allowed to just read/write to files out of a Windows Universal App.
You’d have to use specially protected storage like in the answer above.

Here’s a more detailed answer with examples for reading and writing from/to such a storage file.
You’d have to serialize the objects to a XML-string and then save that to the storage.

Here’s my code for string - serialization:

public static string XmlSerialization(object inputObject, Encoding encodingType)
{
	string xmlResult;
	using (Stream stream = new MemoryStream())
	{
		XmlSerializer s = new XmlSerializer(inputObject.GetType());
		s.Serialize(stream, inputObject);
		stream.Position = 0;
		byte[] b = new byte[stream.Length];
		stream.Read(b, 0, (int) stream.Length);
		xmlResult = encodingType.GetString(b, 0, b.Length);
	}
	return xmlResult;
}

aaaaand here…

public static T XmlDeserialization<T>(string inputString, Encoding encodingType)
{
	Object obj;
	using (new StringReader(inputString))
	{
		byte[] b;
		b = encodingType.GetBytes(inputString);
		Stream stream = new MemoryStream(b);
		XmlSerializer s = new XmlSerializer(typeof (T));
		obj = s.Deserialize(stream);
	}
	return (T) obj;
}

EncodingType would be Encoding.UTF8 most of the time.

Hope that helps,
Psilo

7

thanks for the help
i put the project universal windows in stand by for now
i now make the game for desktop

8

Np. Anytime.
Post when you need help.
Cu