Currently trying to make a method to read in XML files at the moment 50 lines at a time this will be increased to allow larger files to be used in the program.
At the moment i am trying to accomplish this with the following code.
List<dataclass.DataRecord> list = new List<dataclass.DataRecord>();
string filename = "FileLocation"
XmlDocument testing = new XmlDocument();
//using (StreamReader streamreader = new StreamReader(filename))
using (XmlTextReader reader = new XmlTextReader(new StringReader(filename)))
{
while (reader.Read() != null)
{
for (int i = 0; i < 50; i++)
{
testing.Load(reader);
//list.add(line);
Console.WriteLine(testing);
//testing.Load(reader);
}
}
}
commented lines are just from previous ideas i used to accomplish my goal and the filename has been taken out as i just prefer not to place that online.
Basically at the moment i keep getting the following error:
Data at the root level is invalid. Line 1, position 1.
So i dunno if I am:
A. Going about this the right way.
B. Is the only way to fix this error is by surrounding the "testing.load" by "root + /root" tags
hope someone can help thank.
As I explained in my comment XML consists of nodes whereas you are looking at it as though it were a flat-file with lines.
There are a couple of Stackoverflow questions with answers that match what you are trying to do. The real question is "How can you load a large XML file". The answer is to use a stream rather than loading in one big chunk, following on from there you can find lots of resources about using XmlReader.
Couple of pointers to other SO articles:
C# and Reading Large XML Files
Reading large XML documents in .net
Hope that helps!
If you are only trying to load xml into XmlDocument - why not just
XmlDocument testing = new XmlDocument();
testing.Load(filename);
If your XML file is really big, you're better off using some sort of pull parser (parses tag-by-tag, attribute-by-attribute, etc) rather than DOM parser (loads whole document during parsing, keeps it in memory).
Related
I'm trying to learn Spanish and making some flash cards (for my personal use) to help me learn the verbs.
Here is an example, page example. So near the top of the page you will see the past participle: bloqueado & gerund: bloqueando. It is these two values that I wish to obtain in my code and use for my flash cards.
If this is possible I will use a C# console application. I am aware that scraping data from a website is not ideal however this is a once off.
Any guidance on how to start something like this and pitfalls to avoid would be very helpful!
I know this isn't an exact answer, but here is the process I would suggest.
https://www.gnu.org/software/wget/ and mirror the website to a
folder. Wget is a web spider and will follow the links on the site until it has downloaded everything. You'll have to run it with a few different parameters until you figure out the correct settings you want.
Use C# to run through each file in the folder and extract the
words from <section class="verb-mood-section"> in each file. It's your choosing of whether you want to output them to the console or store them in a database or flat file.
Should be that easy, in theory.
Use SGMLReader. SGMLReader is a versatile and robust component that will stream HTML to an XMLReader:
XmlDocument FromHtml(TextReader reader) {
// setup SgmlReader
Sgml.SgmlReader sgmlReader = new Sgml.SgmlReader();
sgmlReader.DocType = "HTML";
sgmlReader.WhitespaceHandling = WhitespaceHandling.All;
sgmlReader.CaseFolding = Sgml.CaseFolding.ToLower;
sgmlReader.InputStream = reader;
// create document
XmlDocument doc = new XmlDocument();
doc.PreserveWhitespace = true;
doc.XmlResolver = null;
doc.Load(sgmlReader);
return doc;
}
You can see that you need to create a TextReader first. TThis would in reality be a StreamReader as a TextReader is an abstract class.
Then you create the XMLDocument over that. Once you've got it into the XMLDocument you can use the various methods supported by XMLDocument to isolate and extract the nodes you need. I'll leave you to explore that aspect of it.
You might try using the XDocument class as it's a lot easier to handle than the XMLDocument, especially if you're a newbie. It also supports LINQ.
I need to read an xml file using c#/.net from a source like so: https://10.1.12.15/xmldata?item=all
That is basically just an xml file.
StreamReader does not like that.
What's the best way to read the contents of that link?
The file looks like so:
- <RIMP>
- <HSI>
<SBSN>CZ325000123</SBSN>
<SPN>ProLiant DL380p Gen8</SPN>
<UUID>BBBBBBGGGGHHHJJJJ</UUID>
<SP>1</SP>
<cUUID>0000-000-222-22222-333333333333</cUUID>
- <VIRTUAL>...
You'll want to use LINQ to XML to process the XML file. The XDocument.Load Method supports loading an XML document from an URI:
var document = XDocument.Load("https://10.1.12.15/xmldata?item=all");
Another way to do this is using the XmlDocument class. A lot of servers around the world are still running .Net Framework < 3.0 so it's good to know that this class still exists alongside XDocumentin case you're developing an application that will be run on a server.
string url = #"https://10.1.12.15/xmldata?item=all";
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(url);
Maybe the correct answer must starting by reading the initial question about how to "Read an XML file from a URL (or in this case from a Http address)".
I think that can be the best for you see the next easy demos:
(In this case XmlTextReader but today you can use XmlReader instead of XmlTextReader)
http://support.microsoft.com/en-us/kb/307643
(Parallel you could read this documentation too).
https://msdn.microsoft.com/en-us/library/system.xml.xmlreader(v=vs.110).aspx
regards
Im making a game, where i generate the map from a xml file.
Does not WP7 support regular xml? also tried to wrap it inside a XnaContent xml file, but all my nodes a invalid.
How do I go about to load a regular xml file into my c# WP7 project?
I think Jon Skeet nailed it on the head, but I had an example where I am doing a read of an xml file from isolated memory I thought I would share.
private const string filePath = "TimeKeeperData.xml";
private static XDocument ReadDataFromIsolatedStorageXmlDoc()
{
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (!storage.FileExists(filePath))
{
return new XDocument();
}
using (var isoFileStream = new IsolatedStorageFileStream(filePath, FileMode.OpenOrCreate, storage))
{
using (XmlReader reader = XmlReader.Create(isoFileStream))
{
return XDocument.Load(reader);
}
}
}
}
Yes, Windows Phone 7 definitely supports regular XML, and it works fine using LINQ to XML to load XML data either from isolated storage, or fetched from the web, or fetched from a resource.
It's unclear exactly what you're trying to do or what's going wrong (partly because you've shown no code) but you can certainly use XML in Windows Phone 7. Not being an XNA developer, I don't know about XnaContent, but you should potentially try loading it as an XDocument first just to check whether that works, and go from there.
When you say all your nodes are invalid, it makes me think you might not be handling xml namespaces correctly. Are you taking them into account, if required?
I have this code on my program that actually loads 500 MB and up files.
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(reader);
reader.Close();
I get this kind of error and don't know how to resolve the problem. Please send me some advice.
I would use an XmlReader to parse the document, providing forward only access to the data and cleans itself up nicely in memory -- of course, it can be much more complex without the convenience of the XmlDocument class.
This simple sample will start by starting to read the file line by line, providing an XmlReader for each line.
using (var rdr = XmlReader.Create(new StreamReader("File.xml")))
{
while (rdr.Read())
{
//do what you will with the line
}
}
See the methods and properties available to you when using the XmlReader at XmlReader Properties (MSDN)
you need something like SAX but for .NET.
http://sourceforge.net/projects/saxdotnet/ or the XmlReader, basically a stream based parser.
HTH
I'm trying to make a report generator inside of a C# application for my boss, I came across this page and looked into RichTextBoxes and think that I can build on this idea to do what my boss is looking for. http://openxmldeveloper.org/articles/OpenXMLDocFromDotNet.aspx
The issue I'm running into is their example code for the XML portion assumed you were creating an application in an Office 2007 beta. The schema listed here doesn't work for retail Office 2007. Can anyone show me where I can look to find out more about schema in general, or explain what the code is doing here? Alternatively, if anyone has a different suggestion for creating a .docx file based on the contents of a rich text box, that would be greatly appreciated. I found different resources that offered advice similar to this: http://nishantrana.wordpress.com/2007/11/03/creating-word-document-using-c/
But I kept having issues getting it to recognize what a WordApp was.
Here's the code from the first link with the schema issues.
private void GenerateDocument_Click(object sender, EventArgs e)
{
string _nameSpaceURI = "http://schemas.microsoft.com/office/word/2005/10/wordml";
string docFileName = GetSavePath();
//-- Step 1 - Creating the document xml
XmlDocument doc = new XmlDocument();
XmlElement _wWordDoc = doc.CreateElement("w:wordDocument", _nameSpaceURI);
doc.AppendChild (_wWordDoc);
XmlElement _wbody = doc.CreateElement("w:body",_nameSpaceURI);
_wWordDoc.AppendChild(_wbody);
// Check if the string contains a line feed
string[] _SplitStr = mleTextForDocument.Text.Split('\n');
// if it contains line feed then each entry with a line feed goes to a new paragraph.
for (int row = 0; row < _SplitStr.Length; row++)
{
XmlElement _wp1 = doc.CreateElement("w:p",_nameSpaceURI);
_wbody.AppendChild(_wp1);
XmlElement _wr1 = doc.CreateElement("w:r", _nameSpaceURI);
_wp1.AppendChild(_wr1);
XmlElement _wt11 = doc.CreateElement("w:t", _nameSpaceURI);
_wr1.AppendChild(_wt11);
XmlNode _wt1 = doc.CreateNode(XmlNodeType.Text, "w:t",_nameSpaceURI);
_wt1.Value = _SplitStr[row];
_wt11.AppendChild(_wt1);
}
//-- Step 2 - Creating the Package
Package package = null;
package = Package.Open(docFileName, FileMode.Create, FileAccess.ReadWrite);
//-- Step 3 - Create the main document part (document.xml)
Uri uri = new Uri("/word/document.xml", UriKind.Relative);
PackagePart part = package.CreatePart(uri, "application/vnd.ms-word.main+xml");
StreamWriter partWrt = new StreamWriter(part.GetStream(FileMode.Create, FileAccess.Write));
doc.Save(partWrt);
partWrt.Close();
package.Flush();
//-- Step 4 - Create the relationship file
uri = new Uri("/word/document.xml", UriKind.Relative);
PackageRelationship rel = package.CreateRelationship(uri, TargetMode.Internal, "http://schemas.microsoft.com/office/2006/relationships/officeDocument", "rId1");
package.Flush();
//-- Step 5- Close the document.
package.Close();
}
I'm sorry for the lack of a clear question, but I really don't know what question to ask. I've never used schemas before, never used XML, and never had to add references to my projects before. Any advice or suggestions are appreciated.
Dispite the ambigious question, and apparently it's coming from my bizzaro evil twin (nwonknu) (elgoog), joke right.
Anyhow, I've said it before and I'll say it again THE source of quality advise for XML/OpenXML is Eric White. He's a very active blogger, looks like 4+ years of consistant postings (sux when good sources just evaporate sometimes), anyhow breeze through his blog for a few minutes and I'm sure your grasp of OpenXML + Linq 2 XML will be a bit more solid.