Csharp/C Sharp/XML LINQ/Attribute
Содержание
- 1 Accessing All of an Element"s Attributes with the Attributes Method
- 2 Accessing an Attribute with the Attribute Method
- 3 Accessing an Element"s Attributes Using the Attributes Method
- 4 Accessing an Element"s First Attribute with the FirstAttribute Property
- 5 Accessing the Last Attribute with the LastAttribute Property
- 6 Accessing the Next Attribute with the NextAttribute Property
- 7 Accessing the Previous Attribute with the PreviousAttribute Property
- 8 Calling the First Attributes Prototype
- 9 Calling the Remove
- 10 Calling the Second Attributes Prototype
- 11 Changing an Attribute"s Value
- 12 Get Attribute with namespace
- 13 Removing All of an Element"s Attributes
- 14 Removing an Attribute
- 15 Using SetAttributeValue to Add, Delete, and Update Attributes
Accessing All of an Element"s Attributes with the Attributes Method
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
foreach (XAttribute attr in firstParticipant.Attributes()) {
Console.WriteLine(attr);
}
}
}
</source>
Accessing an Attribute with the Attribute Method
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(firstParticipant.Attribute("type").Value);
}
}
</source>
Accessing an Element"s Attributes Using the Attributes Method
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XDeclaration("1.0", "UTF-8", "yes"),
new XDocumentType("Books", null, "Books.dtd", null),
new XProcessingInstruction("Book", "out-of-print"),
new XElement("Books", firstParticipant =
new XElement("Book",
new XComment("This is a new author."),
new XProcessingInstruction("AuthorHandler", "new"),
new XAttribute("type", "Author"),
new XElement("FirstName", "J"),
new XElement("LastName", "R")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "E"),
new XElement("LastName", "B"))));
foreach (XAttribute attr in firstParticipant.Attributes()) {
Console.WriteLine(attr);
}
}
}
</source>
Accessing an Element"s First Attribute with the FirstAttribute Property
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XAttribute("language", "English"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(firstParticipant.FirstAttribute);
}
}
</source>
Accessing the Last Attribute with the LastAttribute Property
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XAttribute("language", "English"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(firstParticipant.LastAttribute);
}
}
</source>
Accessing the Next Attribute with the NextAttribute Property
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XAttribute("language", "English"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(firstParticipant.FirstAttribute.NextAttribute);
}
}
</source>
Accessing the Previous Attribute with the PreviousAttribute Property
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XAttribute("language", "English"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(firstParticipant.FirstAttribute.NextAttribute.PreviousAttribute);
}
}
</source>
Calling the First Attributes Prototype
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "A"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
IEnumerable<XElement> elements = xDocument.Element("Books").Elements("Book");
foreach (XElement element in elements) {
Console.WriteLine("Source element: {0} : value = {1}", element.Name, element.Value);
}
foreach (XAttribute attribute in elements.Attributes()) {
Console.WriteLine("Attribute: {0} : value = {1}",
attribute.Name, attribute.Value);
}
}
}
</source>
Calling the Remove
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XComment("This is a new author."),
new XElement("FirstName", "A"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
IEnumerable<XAttribute> attributes = xDocument.Element("Books").Elements("Book").Attributes();
foreach (XAttribute attribute in attributes) {
Console.WriteLine("Source attribute: {0} : value = {1}", attribute.Name, attribute.Value);
}
attributes.Remove();
Console.WriteLine(xDocument);
}
}
</source>
Calling the Second Attributes Prototype
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XDocument xDocument = new XDocument(
new XElement("Books",
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "A"),
new XElement("LastName", "B")),
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "C"),
new XElement("LastName", "D"))));
IEnumerable<XElement> elements = xDocument.Element("Books").Elements("Book");
foreach (XElement element in elements) {
Console.WriteLine("Source element: {0} : value = {1}", element.Name, element.Value);
}
foreach (XAttribute attribute in elements.Attributes("type")) {
Console.WriteLine("Attribute: {0} : value = {1}",
attribute.Name, attribute.Value);
}
}
}
</source>
Changing an Attribute"s Value
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(xDocument);
firstParticipant.Attribute("experience").Value = "beginner";
Console.WriteLine(xDocument);
}
}
</source>
Get Attribute with namespace
<source lang="csharp"> using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.Linq; using System.Reflection; using System.Xml.Linq; class Program {
static void Main(string[] args) {
XElement xml = XElement.Load("Hello_XLINQ.xml");
XNamespace w = "http://schemas.microsoft.ru/office/word/2003/wordml";
XElement defaultFonts = xml.Descendants(w + "defaultFonts").First();
Console.WriteLine("Default Fonts: {0}", (string)defaultFonts.Attribute(w + "ascii"));
}
}
</source>
Removing All of an Element"s Attributes
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XElement("FirstName", "A"),
new XElement("LastName", "B"))));
Console.WriteLine(xDocument);
firstParticipant.Attributes().Remove();
Console.WriteLine(xDocument);
}
}
</source>
Removing an Attribute
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(xDocument);
firstParticipant.Attribute("type").Remove();
Console.WriteLine(xDocument);
}
}
</source>
Using SetAttributeValue to Add, Delete, and Update Attributes
<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Xml; using System.Xml.Linq; public class MainClass {
public static void Main() {
XElement firstParticipant;
XDocument xDocument = new XDocument(
new XElement("Books", firstParticipant =
new XElement("Book",
new XAttribute("type", "Author"),
new XAttribute("experience", "first-time"),
new XElement("FirstName", "J"),
new XElement("LastName", "R"))));
Console.WriteLine(xDocument);
firstParticipant.SetAttributeValue("type", "beginner");
firstParticipant.SetAttributeValue("language", "English");
firstParticipant.SetAttributeValue("experience", null);
Console.WriteLine(xDocument);
}
}
</source>
