Question

this is the code in question:

using (var file = MemoryMappedFile.OpenExisting("AIDA64_SensorValues"))
{
    using (var readerz = file.CreateViewAccessor(0, 0))
    {
        var bytes = new byte[567];
        var encoding = Encoding.ASCII;
        readerz.ReadArray<byte>(0, bytes, 0, bytes.Length);

        File.WriteAllText("C:\\myFile.txt", encoding.GetString(bytes));

        var readerSettings = new XmlReaderSettings { ConformanceLevel = ConformanceLevel.Fragment };
        using (var reader = XmlReader.Create("C:\\myFile.txt", readerSettings))
        {

This is what myfile.txt looks like:

<sys><id>SCPUCLK</id><label>CPU Clock</label><value>1598</value></sys><sys><id>SCPUFSB</id><label>CPU FSB</label><value>266</value></sys><sys><id>SMEMSPEED</id><label>Memory Speed</label><value>DDR2-667</value></sys><sys><id>SFREEMEM</id><label>Free Memory</label><value>415</value></sys><sys><id>SGPU1CLK</id><label>GPU Clock</label><value>562</value></sys><sys><id>SFREELVMEM</id><label>Free Local Video Memory</label><value>229</value></sys><temp><id>TCPU</id><label>CPU</label><value>42</value></temp><temp><id>TGPU1</id><label>GPU</label><value>58</value></temp>

if i write the data to a txt file on the hard drive with:

File.WriteAllText("C:\\myFile.txt", encoding.GetString(bytes));

then read that same text file with the fragment XmlReader:

 XmlReader.Create("C:\\myFile.txt");

it reads it just fine, the program runs and completes like it supposed to, but then if i directly read with the fragment XmlReader like:

XmlReader.Create(encoding.GetString(bytes));

I get exception when run ” illegal characters in path” on the XmlReader.Create line.

ive tried writing it to a separate string first and reading that with xmlreader, and it wouldn’t help to try to print it to CMD to see what it looks like because CMD wouldnt show the invalid characters im dealing with right?

but oh well i did Console.WriteLine(encoding.GetString(bytes)); and it precisely matched the txt file.

so somehow writing it to the text file is removing some “illegal characters”? what do you guys think?

Answer 1

XmlReader.Create(encoding.GetString(bytes));

XmlReader.Create() interprets your string as the URI where it should read a file from. Instead encapsulate your bytes in a StringReader:

StringReader sr = new StringReader(encoding.GetString(bytes));
XmlReader.Create(sr);