Hope you can help me a bit. I'm trying to write to an XML file, but am struggling to write the method which, well, writes to the XML file. This is the XML file manually written (using Notepad++ etc.):
<software>
<software_entry
name="Adobe Acrobat X Standard"
path="Applications\Acrobat\Acrobat X Standard\AcroStan.msi"
type="msi"
switches="/qn ALLUSERS=1"
/>
<software_entry
name="Adobe Acrobat X Professional"
path="Applications\Acrobat\Acrobat X Pro\AcroPro.msi"
type="msi"
switches="/qn ALLUSERS=1"
/>
</software>
The aim of this part of the application is to write that using a GUI.
In the application, the user chooses the name of the XML file. It is then saved in the temp folder until further in the process when the user is asked where they would like to save it. Upon entering the desired name of the file and clicking Create, the method called "createAndLoadXML" is run. As its name would suggest, it creates and then loads an XML file (to populate a listview control on the form). Code can be seen below.
private void createAndLoadXML()
{
// Method to create XML file based on name entered by user
string tempPath = Path.GetTempPath();
string configFileName = fileNameTextBox.Text;
string configPath = tempPath + configFileName + ".xml";
// Create XDocument
XDocument document = new XDocument(
new XDeclaration("1.0", "utf8", "yes"),
new XComment("This XML file defines the software selections for use with the Software Installer"),
new XComment("XML file generated by Software Installer"),
new XElement("software",
new XElement("software_entry",
new XAttribute("name", ""),
new XAttribute("path", ""),
new XAttribute("type", ""),
new XAttribute("switches", ""))
)
);
document.Save(configPath);
configCreateLabel.Visible = true;
document = XDocument.Load(configPath);
}
Now, further down this form are 4 text boxes for user input, each relating to the attributes created (name, path, type and switches) The idea is the user will write in these text boxes, click an 'Add' button and then the program will write those 4 fields as attributes to this XML file. So far, I have this code, which is horribly incomplete and doesn't even use LINQ to XML.
private void writeToXML()
{
// Method to write lines to XML file based on user input
// Sets string variables
string fileName = softwareNameTextBox.Text;
string filePath = filePathTextBox.Text;
string fileType = installerType.Text.ToString();
string installSwitches = installSwitchesTextBox.Text;
using (XmlWriter xw = XmlWriter.Load(configPath)) //This line is wrong, I know
{
xw.WriteStartElement("software");
xw.WriteElementString("name", fileName);
xw.WriteElementString("path", filePath);
xw.WriteElementString("type", fileType);
xw.WriteElementString("switches", installSwitches);
xw.WriteEndElement();
}
}
Basically, could anyone please help me with the above method which writes to the XML the data the user has entered into the text box controls? I'm not sure how to load the previously created XML document (from my createAndLoadXML method), and how to write within the root element (software) using LINQ to XML.
Try this out. I think this should get you what you want assuming the XML exists beforehand since you are calling createAndLoadXML before this method. I wrote this in NotePad++, so I may have a error or two.
private void writeToXML()
{
// Method to write lines to XML file based on user input
// Sets string variables
string fileName = softwareNameTextBox.Text;
string filePath = filePathTextBox.Text;
string fileType = installerType.Text.ToString();
string installSwitches = installSwitchesTextBox.Text;
string FILE_PATH = "bla.xml";
XDocument xDoc = XDocument.Load(FILE_PATH);
xDoc.Root.Add(new XElement("software_entry",
new XAttribute("name", fileName),
new XAttribute("path", filePath),
new XAttribute("type", fileType),
new XAttribute("switches", installSwitches)
));
xDoc.Save(FILE_PATH);
}
Related
I would make a simple program in C# with Windows forms, which gets some data given by the user thanks to some textboxes, and when He presses a button, a dialog (I don't know which one) is displayed, in order to explore the pc folders and choose a destination for saving it there.
Well, I used a FolderBrowserDialog (I don't know if that's the right one for the purpose), but there's a problem: in order to store a PDF with itext7, I have to give an Environment.SpecialFolder variable, while the method selectedPath() to get the user path of the formBrowserDialog returns a string.
I tried to convert the string into Environment.SpecialFolder in some way, but I always get a System.ArgumentException
Here's my code:
string name = txtName.Text;
//
//bla bla bla getting the parameters given by the user
//...
string pdfName = surname+ " - " + hours + "ː" + minutes + ".pdf";
string folder="";
//"fbd" is the FolderBrowserDialog
if (fbd.ShowDialog() == DialogResult.OK)
{
//here I get the folder path (I hope I've chosen the right dialog for this scope, which is a FolderBrowserDialog)
folder = fbd.SelectedPath;
//starting my pdf generation
//here is my attempt to write something in order to parse the path string into an Environment.SpecialFolder type, to use it as a parameter in getFolderPath()
Environment.SpecialFolder path = (Environment.SpecialFolder)Enum.Parse(typeof(Environment.SpecialFolder), folder);
//here it's supposed to give to the GetFolderPath method the Environment.SpecialFolder type.
var exportFolder = Environment.GetFolderPath(path); //ON THIS LINE I GET THE EXCEPTION
var exportFile = System.IO.Path.Combine(exportFolder, pdfName);
using (var writer = new PdfWriter(exportFile))
{
using (var pdf = new PdfDocument(writer))
{
var doc = new Document(pdf);
doc.Add(new Paragraph("
//bla bla bla writing my things on it
"));
}
}
//pdf creation ends
}
To simplify all of this, you don't need to Environment.SpecialFolder variable at all, nor do you need to pass it as a parameter.
The reason that an exception was thrown is because you tried to parse a string into an Environment.SpecialFolder variable enum, when the string could not be parsed into one.
You can look here to see the list of enums included. I would wager that the specific path you selected matches none of those.
Here's what your code is currently doing:
Selecting a path
Trying to parse that path to get an enum for a
special folder
Trying to get the string associated with that
Environment.SpecialFolder variable (so if you had actually been
able to parse it, you would've ended up with just what you started
with)
Combining that string with the name you wanted to give the PDF.
You can simplify all of this by omitting steps 2 and 3, which cause the error.
string pdfName = surname+ " - " + hours + "ː" + minutes + ".pdf";
//You select the folder here
if (fbd.ShowDialog() == DialogResult.OK)
{
string folder = fbd.SelectedPath;
//combine the path of the folder with the pdf name
string exportFile = System.IO.Path.Combine(folder, pdfName);
using (var writer = new PdfWriter(exportFile))
{
using (var pdf = new PdfDocument(writer))
{
var doc = new Document(pdf);
doc.Add(new Paragraph("//bla bla bla writing my things on it"));
}
}
//Pdf creation ends
}
I'm transforming XML using XSLT sheet. The sheet consists of several files, which are included like this:
<xsl:include href="tokens.xsl"/>
<xsl:include href="glayout.xsl"/>
<xsl:include href="scripts.xsl"/>
<xsl:include href="tables.xsl"/>
<xsl:include href="entities.xsl"/>
<xsl:include href="cmarkup.xsl"/>
The transform code looks like following:
// Load text
var reader = XmlReader.Create(new StringReader(text));
// Load transform
XslCompiledTransform myXslTrans = new XslCompiledTransform();
using (var fs = new FileStream(result.FileName, FileMode.Open, FileAccess.Read))
{
var xmlReader = XmlReader.Create(fs);
myXslTrans.Load(xmlReader);
}
// Perform transformation
MemoryStream ms = new MemoryStream();
XmlTextWriter writer = new XmlTextWriter(ms, Encoding.UTF8);
myXslTrans.Transform(reader, null, writer);
// Recover result to string
ms.Seek(0, SeekOrigin.Begin);
var textReader = new StreamReader(ms);
string transformed = textReader.ReadToEnd();
Transform fails on the include lines. I found out, that I may provide my own resolver to provide missing documents, but since their URLs are relative, I'm getting them appended to current application's folder, like:
D:\Dokumenty\Dev\VS\Dev.Editor\Dev.Editor\bin\Debug\tokens.xsl
There are two dirty solutions:
Cut off the application path to retrieve only file name, then search for the file in original sheet's folder (but what if file had a subfolder, like: Include/tokens.xsl?
Temporarily set current directory to the one in which main sheet resides:
var dir = System.IO.Directory.GetCurrentDirectory();
try
{
System.IO.Directory.SetCurrentDirectory(System.IO.Path.GetDirectoryName(result.FileName));
myXslTrans.Load(xmlReader, null, resolver);
}
finally
{
System.IO.Directory.SetCurrentDirectory(dir);
}
But I don't like this solution either. Is there a way to force the XslCompiledTransform to pass the original URLs to the resolver? Or possibly other, more generic solution to this problem?
If you have a file name or URI with the main stylesheet module then use the overload of the Load method taking a string (https://learn.microsoft.com/en-us/dotnet/api/system.xml.xsl.xslcompiledtransform.load?view=netframework-4.8#System_Xml_Xsl_XslCompiledTransform_Load_System_String_) with e.g. myXslTrans.Load(result.FileName).
I am trying to figure out how to read and write files in a UWA application. I understand that I need to open a FileStreamm, but I can't figure out how to do that.
I started with this code:
FileStream fs = new FileStream(#"C:\XML\test.txt", FileMode.Create, FileAccess.Write);
seems to work, no red lines.
At the end of all of that I am told to put in Flush and Close, like this:
FileStream fs = new FileStream(#"C:\XML\test.txt", FileMode.Create,
...
fs.Flush();
fs.Close();
Now, this is where I hit a snag, because fs.Close(); is not even on the list of functions on fs. I just get a red line in my IDE if I try to hardcode it.
Can someone please take the time to help me understand how to do this with UWA? For some reason it seems like there is a different approach in Windows 10 apps, and I have a VERY hard time finding anything that shows me how to do it right. All the tutorials and SOF forum input are about older versions (non-UWA).
When I do this in a console application it all works as expected.
My end goal is to be able to read and write to an XML file in this kind of fashion:
XDocument doc = XDocument.Load(input);
XElement person = doc.Element("Person");
person.Add(new XElement("Employee",
new XElement("Name", "David"),
new XElement("Dept", "Chef")));
doc.Save(output);
I'm going down this path because an answer to my previous question told me to use a FileStream, but I simply cannot make that work in UWA.
You cannot just access any file from a Universal Windows App. Access to the file system is restricted.
See the documentation for details.
To help you further we need to know more about your application. What kind of files do you want to access for what reason?
Example on how to read an Xml File, modify it and store it in an Universal app. You need a button with the following Click handler and a TextBox named "TextBoxLog".
private async void ButtonDemo_Click(object sender, RoutedEventArgs e)
{
// Get our local storage folder
var localFolder = ApplicationData.Current.LocalFolder;
XmlDocument xmlDocument;
// Try to get file
var file = await localFolder.TryGetItemAsync("MyData.xml") as IStorageFile;
if(file != null)
{
// File exists -> Load into XML document
xmlDocument = await XmlDocument.LoadFromFileAsync(file);
}
else
{
// File does not exist, create new document in memory
xmlDocument = new XmlDocument();
xmlDocument.LoadXml(#"<?xml version=""1.0"" encoding=""UTF-8""?>" + Environment.NewLine + "<root></root>");
}
// Now show the current contents
TextBoxLog.Text = "";
var lEntries = xmlDocument.GetElementsByTagName("Entry");
foreach(var lEntry in lEntries)
{
TextBoxLog.Text += lEntry.InnerText + Environment.NewLine;
}
// Now add a new entry
var node = xmlDocument.CreateElement("Entry");
node.InnerText = DateTime.Now.ToString();
xmlDocument.DocumentElement.AppendChild(node);
// If the file does not exist yet, create it
if(file == null)
{
file = await localFolder.CreateFileAsync("MyData.xml");
}
// Now save the document
await xmlDocument.SaveToFileAsync(file);
}
Okay, the (simple) solution is to put the xml-file in the PROJECTFOLDER/bin/x86/debug/appX and then write the data to a list this way:
public class dataRaw
{
public string data { get; set; }
public string firstName { get; set; }
public string lastName { get; set; }
}
//You can call this class with x = collectionGenerator.getList() (it returns a list<T>)
public class collectionGenerator
{
public static List<dataRaw> getList()
{
//This is the xml file in the folder
var doc = XDocument.Load("Data.xml");
//This parse the XML and adds in to the list "dataList"
var dataList = doc.Root
.Descendants("Person")
.Select(node => new dataRaw
{
//data, firstName and lastName are in app variables from dataRaw put into listData.
//Number, FirstName and LastName are the nodes in the XML file.
data = node.Element("Number").Value,
firstName = node.Element("FirstName").Value,
lastName = node.Element("LastName").Value,
})
.ToList();
return dataList;
}
}
I have written a method to save xml file to my project.and I run that method automatically in specific time period(once a day(at 3.00 pm)), same file.
but we have to include that file to the project manually.What I want is before xml file save, look if it is exists. if it is exists delete it and save the new one and include it. this is my code.
this is how I save ....
public void sendValue()
{
string wbserviceUrl = "https://someurl.ashx";
WebClient clientOne = new WebClient();
string result = clientOne.DownloadString(wbserviceUrl);
XmlDocument cruisexmlDocument = new XmlDocument();
cruisexmlDocument.LoadXml(result);
cruisexmlDocument.Save("D:/projects/booksmal/XmlFiles/Cruisedata/product.xml");
}
In here I want to check,
1 -check if the file("product.xml") is exist.
2 -if it is exists then delete it and save the new ("product.xml")
3 -then include that file to the project(is this happen automatically when site host)
(Note: save the file is work fine)
string path = Server.MapPath("~/XmlFiles/Cruisedata/product.xml");
if (System.IO.File.Exists(path))
{
System.IO.File.Delete(path);
}
I am working on a project that requires all SQL connection and query information to be stored in XML files. To make my project configurable, I am trying to create a means to let the user configure his sql connection string information (datasource, catalog, username and password) via a series of text boxes. This input will then be saved to the appropriate node within the SQL document.
I can get the current information from the XML file, and display that information within text boxes for the user's review and correction, but I'm encountering an error when it comes time to save the changes.
Here is the code I'm using to update and save the xml document.
protected void submitBtn_Click(object sender, EventArgs e)
{
SPFile file = methods.web.GetFile("MyXMLFile.xml");
myDoc = new XmlDocument();
byte[] bites = file.OpenBinary();
Stream strm1 = new MemoryStream(bites);
myDoc.Load(strm1);
XmlNode node;
node = myDoc.DocumentElement;
foreach (XmlNode node1 in node.ChildNodes)
{
foreach (XmlNode node2 in node1.ChildNodes)
{
if (node2.Name == "name1")
{
if (node2.InnerText != box1.Text)
{
}
}
if (node2.Name == "name2")
{
if (node2.InnerText != box2.Text)
{
}
}
if (node2.Name == "name3")
{
if (node2.InnerText != box3.Text)
{
node2.InnerText = box3.Text;
}
}
if (node2.Name == "name4")
{
if (node2.InnerText != box4.Text)
{
}
}
}
}
myDoc.Save(strm1);
}
Most of the conditionals are empty at this point because I'm still testing.
The code works great until the last line, as I said. At that point, I get the error "Memory Stream is not expandable." I understand that using a memory stream to update a stored file is incorrect, but I can't figure out the right way to do this.
I've tried to implement the solution given in the similar question at Memory stream is not expandable but that situation is different from mine and so the implementation makes no sense to me. Any clarification would be greatly appreciated.
Using the MemoryStream constructor that takes a byte array as an argument creates a non-resizable instance of a MemoryStream. Since you are making changes to the file (and therefore the underlying bytes), you need a resizable MemoryStream. This can be accomplished by using the parameterless constructor of the MemoryStream class and writing the byte array into the MemoryStream.
Try this:
SPFile file = methods.web.GetFile("MyXMLFile.xml");
myDoc = new XmlDocument();
byte[] bites = file.OpenBinary();
using(MemoryStream strm1 = new MemoryStream()){
strm1.Write(bites, 0, (int)bites.Length);
strm1.Position = 0;
myDoc.Load(strm1);
// all of your edits to the file here
strm1.Position = 0;
// save the file back to disk
using(var fs = new FileStream("FILEPATH",FileMode.Create,FileAccess.ReadWrite)){
myDoc.Save(fs);
}
}
To get the FILEPATH for a Sharepoint file, it'd be something along these lines (I don't have a Sharepoint development environment set up right now):
SPFile file = methods.web.GetFile("MyXMLFile.xml")
var filepath = file.ParentFolder.ServerRelativeUrl + "\\" + file.Name;
Or it might be easier to just use the SaveBinary method of the SPFile class like this:
// same code from above
// all of your edits to the file here
strm1.Position = 0;
// don't use a FileStream, just SaveBinary
file.SaveBinary(strm1);
I didn't test this code, but I've used it in Sharepoint solutions to modify XML (mainly OpenXML) documents in Sharepoint lists. Read this blogpost for more information
You could look into using the XDocument class instead of XmlDocument class.
http://msdn.microsoft.com/en-us/library/system.xml.linq.xdocument.aspx
I prefer it because of the simplicity and it eliminates having to use Memory Stream.
Edit: You can append to the file like this:
XDocument doc = XDocument.Load('filePath');
doc.Root.Add(
new XElement("An Element Name",
new XAttribute("An Attribute", "Some Value"),
new XElement("Nested Element", "Inner Text"))
);
doc.Save(filePath);
Or you can search for an element and update like this:
doc.Root.Elements("The element").First(m =>
m.Attribute("An Attribute").Value == "Some value to match").SetElementValue(
"The element to change", "Value to set element to");
doc.Save('filePath');