XML Reading and Writing with SD card

Archive
41

Thanks :smiley:

42

-1000 experience points! :wink:

43

lol

44

Writing is now working fine, thank you all.
Only thing left is reading. I cannot get a working way of how to transform from a memory reader to a actual sd reader.

This is what I have so far, Is this correct, what to change to make it work? Note the comment on where I do not know what to do.

public void ReadXml(string XmlFile)
        {
            // SD Card is inserted  
            // Create a new storage device  
            PersistentStorage sdPS = new PersistentStorage("SD");

            // Mount the file system  
            sdPS.MountFileSystem();

            // Assume one storage device is available, acces it through  
            // Micro Framework and display available files and folders:  
            // Debug.Print("Getting files and folders: ");  
            string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;
 
            try
            {
                FileStream
                    FileHandle = new FileStream(rootDirectory + @ "\" + XmlFile + ".xml",
                                                FileMode.Open, FileAccess.Read);

                byte[] data = null; //what to do? 
                char[] cc = System.Text.UTF8Encoding.UTF8.GetChars(data);

                string str = new string(cc);
                Debug.Print(str);

                MemoryStream rms = new MemoryStream(data);

                XmlReaderSettings ss = new XmlReaderSettings();
                ss.IgnoreWhitespace = true;
                ss.IgnoreComments = false;

                XmlReader xmlr = XmlReader.Create(rms, ss);
                while (!xmlr.EOF)
                {
                    xmlr.Read();
                    switch (xmlr.NodeType)
                    {
                        case XmlNodeType.Element:
                            Debug.Print("element: " + xmlr.Name);
                            break;
                        case XmlNodeType.Text:
                            Debug.Print("text: " + xmlr.Value);
                            break;
                        case XmlNodeType.XmlDeclaration:
                            Debug.Print("decl: " + xmlr.Name + ", " + xmlr.Value);
                            break;
                        case XmlNodeType.Comment:
                            Debug.Print("comment " + xmlr.Value);
                            break;
                        case XmlNodeType.EndElement:
                            Debug.Print("end element");
                            break;
                        case XmlNodeType.Whitespace:
                            Debug.Print("white space");
                            break;
                        case XmlNodeType.None:
                            Debug.Print("none");
                            break;
                        default:
                            Debug.Print(xmlr.NodeType.ToString());
                            break;
                    }
                }
                sdPS.UnmountFileSystem();
                sdPS.Dispose();
            }

            catch(Exception e)
            {
                Debug.Print("exception: " + e.ToString());
            }
        }
    }

I think I might overlook some stupid mistake again. Have tried several things, so I just added a “null” to it. Hope you can help me :wink:

Thanks again! :wink:

45

See what methods are in the FileStream class. One of them is a read function, IIRC.

46

Tried that one before, then the program hang, the lcd went black and the emx chip was heating, lol.

Will try it again later on, thanks

47

YES!! I finally got it to work!

I wrote this to a XML file on the SD in the program.cs:


write.WriteXml("XML1", "Foekie", "On");]

Then I read the xml file using the xml reader in the xml read class:

And it returned:


<?xml version="1.0" encoding="utf-8"?>


<FEZProto_UserData>
	<UserName>Foekie</UserName>
	<Sound>On</Sound>
</FEZProto_UserData>
decl: xml, 
comment All the user data will be stored in this file.
element: FEZProto_UserData
element: UserName
text: Foekie
end element
element: Sound
text: On
end element
end element
none

@ Chris: this is the working solution to reading the file:

byte[] data = new byte[FileHandle.Length];
FileHandle.Read(data, 0, data.Length);
char[] cc = System.Text.UTF8Encoding.UTF8.GetChars(data);

Thank ALL of you! You have been a great help for me! :clap: