如何讀取及寫入編碼的文件 (LINQ to XML)
若要建立編碼的 XML 文件，您可以將編碼設定為所需的字碼頁名稱，以便將 XDeclaration 加入到 XML 樹狀結構中。
由 WebName 傳回的任何值都是有效的值。
如果您要讀取加密的文件，Encoding 屬性將會設定為字碼頁名稱。
如果您將 Encoding 設定為有效的字碼頁名稱，LINQ to XML 會使用指定的編碼進行序列化。
範例：建立編碼不同的兩份文件，並辨別編碼。
下列範例會建立兩個文件，其中一個編碼為 utf-8，而另一個編碼為 utf-16。 然後，會載入文件並將編碼方式列印至主控台。
Console.WriteLine("Creating a document with utf-8 encoding");
XDocument encodedDoc8 = new XDocument(
new XDeclaration("1.0", "utf-8", "yes"),
new XElement("Root", "Content")
);
encodedDoc8.Save("EncodedUtf8.xml");
Console.WriteLine("Encoding is:{0}", encodedDoc8.Declaration.Encoding);
Console.WriteLine();
Console.WriteLine("Creating a document with utf-16 encoding");
XDocument encodedDoc16 = new XDocument(
new XDeclaration("1.0", "utf-16", "yes"),
new XElement("Root", "Content")
);
encodedDoc16.Save("EncodedUtf16.xml");
Console.WriteLine("Encoding is:{0}", encodedDoc16.Declaration.Encoding);
Console.WriteLine();
XDocument newDoc8 = XDocument.Load("EncodedUtf8.xml");
Console.WriteLine("Encoded document:");
Console.WriteLine(File.ReadAllText("EncodedUtf8.xml"));
Console.WriteLine();
Console.WriteLine("Encoding of loaded document is:{0}", newDoc8.Declaration.Encoding);
Console.WriteLine();
XDocument newDoc16 = XDocument.Load("EncodedUtf16.xml");
Console.WriteLine("Encoded document:");
Console.WriteLine(File.ReadAllText("EncodedUtf16.xml"));
Console.WriteLine();
Console.WriteLine("Encoding of loaded document is:{0}", newDoc16.Declaration.Encoding);
Console.WriteLine("Creating a document with utf-8 encoding")
Dim encodedDoc8 As XDocument = _
<?xml version='1.0' encoding='utf-8' standalone='yes'?>
<Root>Content</Root>
encodedDoc8.Save("EncodedUtf8.xml")
Console.WriteLine("Encoding is:{0}", encodedDoc8.Declaration.Encoding)
Console.WriteLine()
Console.WriteLine("Creating a document with utf-16 encoding")
Dim encodedDoc16 As XDocument = _
<?xml version='1.0' encoding='utf-16' standalone='yes'?>
<Root>Content</Root>
encodedDoc16.Save("EncodedUtf16.xml")
Console.WriteLine("Encoding is:{0}", encodedDoc16.Declaration.Encoding)
Console.WriteLine()
Dim newDoc8 As XDocument = XDocument.Load("EncodedUtf8.xml")
Console.WriteLine("Encoded document:")
Console.WriteLine(File.ReadAllText("EncodedUtf8.xml"))
Console.WriteLine()
Console.WriteLine("Encoding of loaded document is:{0}", newDoc8.Declaration.Encoding)
Console.WriteLine()
Dim newDoc16 As XDocument = XDocument.Load("EncodedUtf16.xml")
Console.WriteLine("Encoded document:")
Console.WriteLine(File.ReadAllText("EncodedUtf16.xml"))
Console.WriteLine()
Console.WriteLine("Encoding of loaded document is:{0}", newDoc16.Declaration.Encoding)
這個範例會產生下列輸出：
Creating a document with utf-8 encoding
Encoding is:utf-8
Creating a document with utf-16 encoding
Encoding is:utf-16
Encoded document:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Root>Content</Root>
Encoding of loaded document is:utf-8
Encoded document:
<?xml version="1.0" encoding="utf-16" standalone="yes"?>
<Root>Content</Root>
Encoding of loaded document is:utf-16
