I am trying to load into my Maui/Blazor app an XML file with Customers in it.
This data.xml is in a different project to where my UI-Components are (one of which, calls the DemoData to be display on client request). The problem I have is that I cant get the path of this file to load the document.
I have tried this way:
XmlDocument doc = new XmlDocument();
var ass = Assembly.GetExecutingAssembly();
string assemblyPath = ass.Location;
string assemblyDirectory = Path.GetDirectoryName(assemblyPath);
string filePath = Path.Combine(assemblyDirectory, "Data","demodata", "data.xml");
doc.Load(filePath);
But the assemblyPath return null.
Related
I'm trying to edit xml file.
but document.Save() method has to use another file name.
Is there any way to use same file? or other method. Thank you!
string path = "test.xml";
using (FileStream xmlFile = File.OpenRead(path))
{
XDocument document = XDocument.Load(xmlFile);
var setupEl = document.Root;
var groupEl = setupEl.Elements().ElementAt(0);
var valueEl = groupEl.Elements().ElementAt(1);
valueEl.Value = "Test2";
document.Save("test-result.xml");
// document.Save("test.xml"); I want to use this line.
}
I receive the error:
The process cannot access the file '[...]\test.xml' because it is being used by another process.
The problem is that you are trying to write to the file while you still have it open. However, you have no need to have it open once you've loaded the XML file. Simply scoping your code more granularly will solve the issue:
string path = "test.xml";
XDocument document;
using (FileStream xmlFile = File.OpenRead(path))
{
document = XDocument.Load(xmlFile);
}
// the rest of your code
I have some names of files. I am creating a XML file to store them. When application runs second time it should recognize those file names. Here is my code:
XmlWriter writer = XmlWriter.Create("settings.xml");
writer.WriteStartElement("DialogCreater");
writer.WriteElementString("conditionsFile", conditionsFile);
writer.WriteEndElement();
writer.Close();
But when I use those file names like this:
string[] lines = File.ReadAllLines(charactersFile);
It gives me an error.
System.NotSupportedException
Here how I read them from XML file:
XmlDocument doc = new XmlDocument();
doc.Load("settings.xml");
XmlNodeList node = doc.GetElementsByTagName("files");
foreach (XmlNode n in node[0].ChildNodes)
{
if (n.Name == "conditionsFile") conditionsFile = n.InnerText;
}
NotSupportedException
path is in an invalid format according to msdn documentation. you can fix it by checking path exist or not before reading from itMore info
string path = #"c:\temp\MyTest.txt";
// This text is added only once to the file.
if (!File.Exists(path))
{
//file exist
}
I am trying to write a C# class that validates a xml file using a DTD file located in another folder that is not in a relative location with the DOCTYPE string, so far, my code is like this:
var settings = new XmlReaderSettings();
settings.DtdProcessing = DtdProcessing.Parse;
settings.ValidationType = ValidationType.DTD;
settings.XmlResolver = new XmlUrlResolver();
settings.ValidationEventHandler += new ValidationEventHandler(IsLoaded);
using (var reader = XmlReader.Create(new StringReader(xmlString), settings))
{
while (reader.Read()) { }
reader.Close();
}
So far this works fine loading the DTD file from the DOCTYPE string included in the xml file, but the DTD file itself must be kept in a folder that is relative to where the program is being excuted. Is there a way to mingle with the XmlResolver class where I can ask it to get a DTD file from another location on my hard drive, like an absoute path being passed in the find the DTD files instead of using the DOCTYPE string?
In C# am trying to check to see if an XML file is created, if not create the file and then create the xml declaration, a comment and a parent node.
When I try to load it, it gives me this error:
"The process cannot access the file 'C:\FileMoveResults\Applications.xml' because it is being used by another process."
I checked the task manager to ensure it wasn't open and sure enough there were no open applications of it. Any ideas of what's going on?
Here is the code I am using:
//check for the xml file
if (!File.Exists(GlobalVars.strXMLPath))
{
//create the xml file
File.Create(GlobalVars.strXMLPath);
//create the structure
XmlDocument doc = new XmlDocument();
doc.Load(GlobalVars.strXMLPath);
//create the xml declaration
XmlDeclaration xdec = doc.CreateXmlDeclaration("1.0", null, null);
//create the comment
XmlComment xcom = doc.CreateComment("This file contains all the apps, versions, source and destination paths.");
//create the application parent node
XmlNode newApp = doc.CreateElement("applications");
//save
doc.Save(GlobalVars.strXMLPath);
Here is the code I ended up using to fix this issue:
//check for the xml file
if (!File.Exists(GlobalVars.strXMLPath))
{
using (XmlWriter xWriter = XmlWriter.Create(GlobalVars.strXMLPath))
{
xWriter.WriteStartDocument();
xWriter.WriteComment("This file contains all the apps, versions, source and destination paths.");
xWriter.WriteStartElement("application");
xWriter.WriteFullEndElement();
xWriter.WriteEndDocument();
}
File.Create() returns a FileStream that locks the file until it's closed.
You don't need to call File.Create() at all; doc.Save() will create or overwrite the file.
I would suggest something like this:
string filePath = "C:/myFilePath";
XmlDocument doc = new XmlDocument();
if (System.IO.File.Exists(filePath))
{
doc.Load(filePath);
}
else
{
using (XmlWriter xWriter = XmlWriter.Create(filePath))
{
xWriter.WriteStartDocument();
xWriter.WriteStartElement("Element Name");
xWriter.WriteEndElement();
xWriter.WriteEndDocument();
}
//OR
XmlDeclaration xdec = doc.CreateXmlDeclaration("1.0", null, null);
XmlComment xcom = doc.CreateComment("This file contains all the apps, versions, source and destination paths.");
XmlNode newApp = doc.CreateElement("applications");
XmlNode newApp = doc.CreateElement("applications1");
XmlNode newApp = doc.CreateElement("applications2");
doc.Save(filePath); //save a copy
}
The reason your code is currently having problems is because of: File.Create creates the file and opens the stream to the file, and then you never make use of it (never close it) on this line:
//create the xml file
File.Create(GlobalVars.strXMLPath);
if you did something like
//create the xml file
using(Stream fStream = File.Create(GlobalVars.strXMLPath)) { }
Then you would not get that in use exception.
As a side note XmlDocument.Load will not create a file, only work with an already create one
You could create a stream, setting the FileMode to FileMode.Create and then use the stream to save the Xml to the path specified.
using (System.IO.Stream stream = new System.IO.FileStream(GlobalVars.strXMLPath, FileMode.Create))
{
XmlDocument doc = new XmlDocument();
...
doc.Save(stream);
}
I have an xml file that refers to a local dtd file. But the problem is that my files are being compressed into a single file (I am using Unity3D and it puts all my textfiles into one binary). This question is not Unity3D specific, it is useful for anyone that tries to load a DTD schema from a string.
I have thought of a workaround to load the xml and load the dtd separately and then add the dtd file to the XmlSchemas of my document. Like so:
private void ReadConfig(string filePath)
{
// load the xml file
TextAsset text = (TextAsset)Resources.Load(filePath);
StringReader sr = new StringReader(text.text);
sr.Read(); // skip BOM, Unity3D catch!
// load the dtd file
TextAsset dtdAsset = (TextAsset)Resources.Load("Configs/condigDtd");
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add(...); // my dtd should be added into this schemaset somehow, but it's only a string and not a filepath.
XmlReaderSettings settings = new XmlReaderSettings() { ValidationType = ValidationType.DTD, ProhibitDtd = false, Schemas = schemaSet};
XmlReader r = XmlReader.Create(sr, settings);
XmlDocument doc = new XmlDocument();
doc.Load(r);
}
The xml starts like this, but the dtd cannot be found. Not strange, because the xml file was loaded as a string, not from a file.
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Scene SYSTEM "configDtd.dtd">
XmlSchema has a Read method that takes in a Stream and a ValidationEventHandler. If the DTD is a string, you could convert it to a stream
System.Text.Encoding encode = System.Tet.Encoding.UTF8;
MemoryStream ms = new MemoryStream(encode.GetBytes(myDTD));
create the XmlSchema
XmlSchema mySchema = XmlSchema.Read(ms, DTDValidation);
add this schema to the XmlDocument containing the xml you are validating
myXMLDocument.Schemas.Add(mySchema);
myXMLDocument.Schemas.Compile();
myXMLDocument.Validate(DTDValidation);
The DTDValidation() handler would contain code handling what to do if the xml is invalid.