Using C # Dynamic generation of library information XML file _ practical skills

The Library information XML file (books.xml) is dynamically generated through C #, and the file is as follows:

Copy Code code as follows:

<?xml version= "1.0" encoding= "Iso-8859-1"?>
<bookstore>

<book id= "1" category= "CHILDREN" >
<title>harry potter</title>
<author>j K. rowling</author>
<publishDate>2005-08-15</publishDate>
<price>29.99</price>
</book>

<book id= "2" category= "WEB" >
<title>learning xml</title>
<author>erik T. ray</author>
<publishDate>2003-10-18</publishDate>
<price>39.95</price>
</book>

</bookstore>

Method 1: Use StringBuilder to stitch XML

Copy Code code as follows:

<summary>
Create book information xml
</summary>
public void Createbookxml (string fileName)
{
StringBuilder Xmlresult = new StringBuilder ("<?xml version=\" 1.0\ "encoding=\" utf-8\ "?>");
List<bookinfo> Booklist = Getbooklist (); Get a list of books
if (Booklist!= null && booklist.count > 0)
{
Xmlresult.append ("<bookstore>");
foreach (BookInfo book in Booklist)
{
Xmlresult.appendformat ("<book id=\" {0}\ "category=\" {1}\ ">", Book. BookID, book. Category);
Xmlresult.appendformat ("<title>{0}</title>", book. Title);
Xmlresult.appendformat ("<author>{0}</author>", book. Author);
Xmlresult.appendformat ("<publishDate>{0}</publishDate>", book. Publishdate.tostring ("Yyyy-mm-dd"));
Xmlresult.appendformat ("<price>{0}</price>", book. Price);
Xmlresult.append ("</book>");
}
Xmlresult.append ("</bookstore>");
}

Write to File
Try
{
1. Create a file stream
FileStream FileStream = new FileStream (FileName, FileMode.Create);
2. Create the writer
StreamWriter StreamWriter = new StreamWriter (FileStream);
3. Writing content to a file
Streamwriter.writeline (Xmlresult);
4. Turn off the writer
StreamWriter.Close ();
5. Close file stream
Filestream.close ();
}
catch (Exception e)
{ }
}

Method 2: Create XML using the XmlTextWriter class

Copy Code code as follows:

<summary>
Create book information xml
</summary>
<param name= "FileName" ></param>
public void Createbookxml (string fileName)
{
Try
{
FileStream FileStream = new FileStream (FileName, FileMode.Create);
XmlTextWriter writer = new XmlTextWriter (FileStream, Encoding.UTF8);
List<bookinfo> Booklist = Getbooklist (); Get a list of books
if (Booklist!= null && booklist.count > 0)
{
Writer. WriteStartDocument ();
Writer. WriteStartElement ("bookstore"); Create parent Node
foreach (BookInfo book in Booklist)
{
Writer. WriteStartElement ("book"); Creating child nodes
Writer. WriteAttributeString ("id", book.) Bookid.tostring ()); Add properties
Writer. WriteAttributeString ("category", book. Category);
Book name node
Writer. WriteStartElement ("title");
Writer. WriteValue (book. Title); Node Assignment
Writer. WriteEndElement ();
Book author node
Writer. WriteStartElement ("author");
Writer. WriteValue (book. Author);
Writer. WriteEndElement ();
Publication Time Node
Writer. WriteStartElement ("Publishdate");
Writer. WriteValue (book. Publishdate.tostring ("Yyyy-mm-dd"));
Writer. WriteEndElement ();
Sales Price Node
Writer. WriteStartElement ("Price");
Writer. WriteValue (book. Price);
Writer. WriteEndElement ();

Writer. WriteEndElement (); Child node End
}
Writer. WriteEndElement (); End of parent node
}
Writer. WriteEndDocument ();
Writer. Close ();
Filestream.close ();
}
catch (Exception e)
{ }
}

XmlTextWriter class: Represents a writer that provides fast, cacheable, and forward-only methods that generate streams or files that contain XML data.
WriteStartDocument () Method: writes an XML declaration.
WriteEndDocument () Method: Closes any open elements or attributes and sets the writer back to the start state.
WriteStartElement (String LocalName) method: Creates the beginning of a node.
WriteAttributeString (String localname, String value) method: Adds an attribute to a node.
WriteValue (Value) method: Assigns a value to a node.

3, other code

3.1 Getting a list of books

Copy Code code as follows:

<summary>
Get a list of books
</summary>
<returns></returns>
Public list<bookinfo> getbooklist ()
{
list<bookinfo> Booklist = new list<bookinfo> ();
BookInfo Book1 = new BookInfo () {
BookID = 1,
Category = "CHILDREN",
Title = "Harry Potter",
Author = "J K. Rowling",
Publishdate = new DateTime (2005,08,15),
Price = 29.99
};
Booklist.add (BOOK1);
BookInfo book2 = new BookInfo ()
{
BookID = 2,
Category = "WEB",
Title = "Learning XML",
Author = "Erik T. Ray",
Publishdate = new DateTime (2003,10,18),
Price = 39.95
};
Booklist.add (BOOK2);
return Booklist;
}

3.2 Library Information entity class

Copy Code code as follows:

<summary>
Library Information Entity class
</summary>
public class BookInfo
{
public int BookID {set; get;}//book ID
public string Title {set; get;}//Book name
public string Category {set; get;}//Book category
public string Author {set; get;}//Book author
Public DateTime publishdate {set; get;}//Publication time
Public Double prices {set; get;}//Sales price
}