my xml stored in xml file which look like as below
<?xml version="1.0" encoding="utf-8"?>
<metroStyleManager>
<Style>Blue</Style>
<Theme>Dark</Theme>
<Owner>CSRAssistant.Form1, Text: CSR Assistant</Owner>
<Site>System.ComponentModel.Container+Site</Site>
<Container>System.ComponentModel.Container</Container>
</metroStyleManager>
this way i am iterating but some glitch is there
XmlReader rdr = XmlReader.Create(System.IO.Path.GetDirectoryName(System.Windows.Forms.Application.ExecutablePath) + #"\Products.xml");
while (rdr.Read())
{
if (rdr.NodeType == XmlNodeType.Element)
{
string xx1= rdr.LocalName;
string xx = rdr.Value;
}
}
it is always getting empty string xx = rdr.Value;
when element is style then value should be Blue as in the file but i am getting always empty....can u say why?
another requirement is i want to iterate always within <metroStyleManager></metroStyleManager>
can anyone help for the above two points. thanks
Blue is the value of Text node, not of Element node. You either need to add another if to get value of text nodes, or you can read inner xml of current element node:
rdr.MoveToContent();
while (rdr.Read())
{
if (rdr.NodeType == XmlNodeType.Element)
{
string name = rdr.LocalName;
string value = rdr.ReadInnerXml();
}
}
You can also use Linq to Xml to get names and values of root children:
var xdoc = XDocument.Load(path_to_xml);
var query = from e in xdoc.Root.Elements()
select new {
e.Name.LocalName,
Value = (string)e
};
You can use the XmlDocument class for this.
XmlDocument doc = new XmlDocument.Load(filename);
foreach (XmlNode node in doc.ChildNodes)
{
if (node.ElementName == "metroStyleManager")
{
foreach (XmlNode subNode in node.ChildNodes)
{
string key = subNode.LocalName; // Style, Theme, etc.
string value = subNode.Value; // Blue, Dark, etc.
}
}
else
{
...
}
}
you can user XDocument xDoc = XDocument.Load(strFilePath) to load XML file.
then you can use
foreach (XElement xeNode in xDoc.Element("metroStyleManager").Elements())
{
//Check if node exist
if (!xeNode.Elements("Style").Any()
//If yes then
xeNode.Value
}
Hope it Helps...
BTW, its from System.XML.Linq.XDocument
Related
I have a XML file which contains about 850 XML nodes. Like this:
<NameValueItem>
<Text>Test</Text>
<Code>Test</Code>
</NameValueItem>
........ 849 more
And I want to add a new Childnode inside each and every Node. So I end up like this:
<NameValueItem>
<Text>Test</Text>
<Code>Test</Code>
<Description>TestDescription</Description>
</NameValueItem>
........ 849 more
I've tried the following:
XmlDocument doc = new XmlDocument();
doc.Load(xmlPath);
XmlNodeList nodes = doc.GetElementsByTagName("NameValueItem");
Which gives me all of the nodes, but from here am stuck(guess I need to iterate over all of the nodes and append to each and every) Any examples?
You need something along the lines of this example below. On each of your nodes, you need to create a new element to add to it. I assume you will be getting different values for the InnerText property, but I just used your example.
foreach (var rootNode in nodes)
{
XmlElement element = doc.CreateElement("Description");
element.InnerText = "TestDescription";
root.AppendChild(element);
}
You should just be able to use a foreach loop over your XmlNodeList and insert the node into each XmlNode:
foreach(XmlNode node in nodes)
{
node.AppendChild(new XmlNode()
{
Name = "Description",
Value = [value to insert]
});
}
This can also be done with XDocument using LINQ to XML as such:
XDocument doc = XDocument.Load(xmlDoc);
var updated = doc.Elements("NameValueItem").Select(n => n.Add(new XElement() { Name = "Description", Value = [newvalue]}));
doc.ReplaceWith(updated);
If you don't want to parse XML using proper classes (i.e. XDocument), you can use Regex to find a place to insert your tag and insert it:
string s = #"<NameValueItem>
<Text>Test</Text>
<Code>Test</Code>
</NameValueItem>";
string newTag = "<Description>TestDescription</Description>";
string result = Regex.Replace(s, #"(?<=</Code>)", Environment.NewLine + newTag);
but the best solution is Linq2XML (it's much better, than simple XmlDocument, that is deprecated at now).
string s = #"<root>
<NameValueItem>
<Text>Test</Text>
<Code>Test</Code>
</NameValueItem>
<NameValueItem>
<Text>Test2</Text>
<Code>Test2</Code>
</NameValueItem>
</root>";
var doc = XDocument.Load(new StringReader(s));
var elms = doc.Descendants("NameValueItem");
foreach (var element in elms)
{
element.Add(new XElement("Description", "TestDescription"));
}
var text = new StringWriter();
doc.Save(text);
Console.WriteLine(text);
I am reading an XML that contains a tag like this:
<source><bpt id="1"><donottranslate></bpt><ph id="2">($ T_353_1 Parent ID $)</ph><ept id="1"></donottranslate></ept></source>
When reading source node I get that this node type is Text, but it should be Element.
This is an XML that I am receiving and I cannot change it.
Do you know how can I get this sorted out?
This is my code:
XDocument doc = XDocument.Load(fileName, LoadOptions.PreserveWhitespace);
foreach (var elUnit in doc.Descendants("trans-unit"))
{
if (elUnit.AttributeString("translate").ToString() == "no")
{
foreach (var elSource in elUnit.Elements("source"))
{
string text = "";
foreach (var node in elSource.DescendantNodes().Where(n => XmlNodeType.Text == n.NodeType).ToList())
{
//When reading that "source" node, it enters inside this code
Thanks
First check whether your XML is wellformed
http://www.w3schools.com/xml/xml_validator.asp
http://chris.photobooks.com/xml/default.htm
I could get this to work
//using System.Xml.Linq;
var str = "<source><bpt id=\"1\"><donottranslate></bpt>" +
"<ph id=\"2\">($ T_353_1 Parent ID $)</ph>" +
"<ept id=\"1\"></donottranslate></ept></source>";
XElement element = XElement.Parse(str);
Console.WriteLine(element);
The output is this
<source>
<bpt id="1"><donottranslate></bpt>
<ph id="2">($ T_353_1 Parent ID $)</ph>
<ept id="1"></donottranslate></ept>
</source>
Please provide some code sample for more help if this example if not suffient.
Finally, I solved this checking if the node is correct or not:
if (System.Security.SecurityElement.IsValidText(text.XmlDecodeEntities()))
I've tried deleting a node from my XML file 3 different ways; and each way I've come up empty. I am querying a SQL database and grabbing a filename, I want to delete the entire node were the file name in the XML document is = to the SQL database result.
I'm not sure what's wrong in my code:
Background Information
fn44 is the Filename grabbed from a SQL database (all my info is in a
SQL table, I need an XML file for use with JavaScript)
XML:
<?xml version="1.0" encoding="utf-8"?>
<xml>
<bannerMain>
<department>main</department>
<filename>resdrop.png</filename>
<title>This is a Title</title>
<text><![CDATA[caption text]]></text>
</bannerMain>
</xml>
Attempt 1 (I know that I'm not getting to the child correctly, can't seem to figure out how to fix it):
XDocument doc = XDocument.Load(Server.MapPath("~/uploads/banners.xml"));
var q = from node in doc.Descendants("bannerMain")
let fina = node.Descendants("filename")/*PROBLEM LINE*/
where fina != null && fina == myReader[0]/*Gets filename from SQL database*/
select node;
q.ToList().ForEach(x => x.Remove());
doc.Save(Server.MapPath("~/uploads/banners.xml"));
Attempt 2 (should work in my mind but doesn't)
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("~/uploads/banners.xml"));
XmlNode nodeToDelete = xmlDoc.SelectSingleNode("/xml/bannerMain[#filename="
+ fn44 + "]");
if (nodeToDelete != null)
{
nodeToDelete.ParentNode.RemoveChild(nodeToDelete);
}
xmlDoc.Save(Server.MapPath("~/uploads/banners.xml"));
Attempt 3 (similar to attempt 2)
string nodeToDelete = fn44;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(Server.MapPath("~/uploads/banners.xml"));
XmlNode node = xmlDoc.SelectSingleNode(string.Format("//*[filename=\"{0}\"]"
, nodeToDelete));
if (node != null)
xmlDoc.SelectSingleNode("xml/bannersMain").RemoveChild(node);
xmlDoc.Save(Server.MapPath("~/uploads/banners.xml"));
I want to delete the whole node where the filename is = to the filename that is grabbed from the SQL database. Any help/resources is much appreciated.
SOLVED:
There's a few different options in the below answers that work out well.
Solution 1:
var xDoc = XDocument.Load(Server.MapPath("~/uploads/banners.xml"));
string fileName = fn44; //Use whatever value you found in SQL DB...
xDoc.Descendants("filename").Where(c => c.Value == fileName).Select(x => x.Parent).Remove();
xDoc.Save(Server.MapPath("~/uploads/banners.xml"));
Solution 2:
XDocument doc = XDocument.Load(Server.MapPath("~/uploads/banners.xml"));
var q = from node in doc.Descendants("bannerMain")
let fina = node.Element("filename")
where fina != null && fina.Value == fn44
select node;
q.Remove();
doc.Save(Server.MapPath("~/uploads/banners.xml"));
That seems to work for me:
string xmlfile = Server.MapPath("~/uploads/banners.xml");
var xDoc = XDocument.Load(xmlfile);
string fileName = "resdrop.png"; // Value from SQL DB
xDoc.Descendants("filename")
.Where(c => c.Value == fileName)
.Select(x => x.Parent)
.Remove();
xDoc.Save(xmlfile);
Your problem with attempt #1 is that you are trying to compare an IEnumerable<XElement> to your reader value, this should work (assuming each bannerMain only has a single filename element):
var q = from node in doc.Descendants("bannerMain")
let fina = node.Element("filename")//only single filename, so get just that XElement
where fina != null && fina.Value == reader[0]//assumes reader[0] is a string value
select node;
To remove them just do this:
q.Remove();
doc.Save(Server.MapPath("~/uploads/banners.xml"));
I ran this through LINQPad and after doing q.Remove();, here were the contents of doc: <xml />.
It's a little verbose but here is a non-linq snippet:
void DeleteNode(string fileName)
{
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath("~/uploads/banners.xml"));
//Get all the bannerMain nodes.
XmlNodeList nodelist = doc.SelectNodes("/xml//bannerMain");
if (nodelist != null)
{
foreach (XmlNode node in nodelist)
{
//Look for then filename child. If it contains desired value
//delete the entire bannerMain node. Assumes order of child nodes
//may not be a constant.
foreach (XmlNode child in node.ChildNodes)
{
if (child.Name == "filename" && child.InnerText == name)
{
node.ParentNode.RemoveChild(node);
}
}
}
doc.Save(Server.MapPath("~/uploads/banners.xml"));
}
}
For Attempt #2, remove the # sign for the filename. The # symbol represents an Attribute, but the filename is a child-node.
If your phrase doesn't work, I'd rephrase it a little from:
"/xml/bannerMain[filename=
to
"//bannerMain[filename=
I have a DataGridView control where some values are popluted.
And also I have an xml file. The user can change the value in the Warning Column of DataGridView.And that needs to be saved in the xml file.
The below program just does the job
XDocument xdoc = XDocument.Load(filePath);
//match the record
foreach (var rule in xdoc.Descendants("Rule"))
{
foreach (var row in dgRulesMaster.Rows.Cast<DataGridViewRow>())
{
if (rule.Attribute("id").Value == row.Cells[0].Value.ToString())
{
rule.Attribute("action").Value = row.Cells[3].Value.ToString();
}
}
}
//save the record
xdoc.Save(filePath);
Matching the grid values with the XML document and for the matched values, updating the needed XML attribute.
Is there a better way to code this?
Thanks
You could do something like this:
var rules = dgRulesMaster.Rows.Cast<DataGridViewRow>()
.Select(x => new {
RuleId = x.Cells[0].Value.ToString(),
IsWarning = x.Cells[3].Value.ToString() });
var tuples = from n in xdoc.Descendants("Rule")
from r in rules
where n.Attribute("id").Value == r.RuleId
select new { Node = n, Rule = r };
foreach(var tuple in tuples)
tuple.Node.Attribute("action").Value = tuple.Rule.IsWarning;
This is basically the same, just a bit more LINQ-y. Whether or not this is "better" is debatable. One thing I removed is the conversion of IsWarning first to string, then to int and finally back to string. It now is converted to string once and left that way.
XPath allows you to target nodes in the xml with alot of power. Microsoft's example of using the XPathNavigator to modify an XML file is as follows:
XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();
XmlNamespaceManager manager = new XmlNamespaceManager(navigator.NameTable);
manager.AddNamespace("bk", "http://www.contoso.com/books");
foreach (XPathNavigator nav in navigator.Select("//bk:price", manager))
{
if (nav.Value == "11.99")
{
nav.SetValue("12.99");
}
}
Console.WriteLine(navigator.OuterXml);
Source: http://msdn.microsoft.com/en-us/library/zx28tfx1(v=vs.80).aspx
I am a beginner to XML and XPath in C#. Here is an example of my XML doc:
<root>
<folder1>
...
<folderN>
...
<nodeMustExist>...
<nodeToBeUpdated>some value</nodeToBeUpdated>
....
</root>
What I need is to update the value of nodeToBeUdpated if the node exists or add this node after the nodeMustExist if nodeToBeUpdated is not there. The prototype of the function is something like this:
void UpdateNode(
xmlDocument xml,
string nodeMustExist,
string nodeToBeUpdte,
string newVal
)
{
/*
search for XMLNode with name = nodeToBeUpdate in xml
to XmlNodeToBeUpdated (XmlNode type?)
if (xmlNodeToBeUpdated != null)
{
xmlNodeToBeUpdated.value(?) = newVal;
}
else
{
search for nodeMustExist in xml to xmlNodeMustExist obj
if ( xmlNodeMustExist != null )
{
add xmlNodeToBeUpdated as next node
xmlNodeToBeUpdte.value = newVal;
}
}
*/
}
Maybe there are other better and simplified way to do this. Any advice?
By the way, if nodeToBeUpdated appears more than once in other places, I just want to update the first one.
This is to update all nodes in folder:
public void UpdateNodes(XmlDocument doc, string newVal)
{
XmlNodeList folderNodes = doc.SelectNodes("folder");
if (folderNodes.Count > 0)
foreach (XmlNode folderNode in folderNodes)
{
XmlNode updateNode = folderNode.SelectSingleNode("nodeToBeUpdated");
XmlNode mustExistNode = folderNode.SelectSingleNode("nodeMustExist"); ;
if (updateNode != null)
{
updateNode.InnerText = newVal;
}
else if (mustExistNode != null)
{
XmlNode node = folderNode.OwnerDocument.CreateNode(XmlNodeType.Element, "nodeToBeUpdated", null);
node.InnerText = newVal;
folderNode.AppendChild(node);
}
}
}
If you want to update a particular node, you cannot pass string nodeToBeUpdte, but you will have to pass the XmlNode of the XmlDocument.
I have omitted the passing of node names in the function since nodes names are unlikely to change and can be hardcoded. However, you can pass these to the functions and use the strings instead of hardcoded node names.
The XPath expression that selects all instances of <nodeToBeUpdated> would be this:
/root/folder[nodeMustExist]/nodeToBeUpdated
or, in a more generic form:
/root/folder[*[name() = 'nodeMustExist']]/*[name() = 'nodeToBeUpdated']
suitable for:
void UpdateNode(xmlDocument xml,
string nodeMustExist,
string nodeToBeUpdte,
string newVal)
{
string xPath = "/root/folder[*[name() = '{0}']]/*[name() = '{1}']";
xPath = String.Format(xPath, nodeMustExist, nodeToBeUpdte);
foreach (XmlNode n in xml.SelectNodes(xPath))
{
n.Value = newVal;
}
}
Have a look at the SelectSingleNode method MSDN Doc
your xpath wants to be something like "//YourNodeNameHere" ;
once you have found that node you can then traverse back up the tree to get to the 'nodeMustExist' node:
XmlNode nodeMustExistNode = yourNode.Parent["nodeMustExist];