XmlWriter.WriteElementString XmlWriter.WriteElementString XmlWriter.WriteElementString XmlWriter.WriteElementString Method

定義

寫入包含字串值的項目。Writes an element containing a string value.

多載

WriteElementString(String, String) WriteElementString(String, String) WriteElementString(String, String) WriteElementString(String, String)

寫入具有指定之區域名稱和值的項目。Writes an element with the specified local name and value.

WriteElementString(String, String, String) WriteElementString(String, String, String) WriteElementString(String, String, String) WriteElementString(String, String, String)

寫入具有指定之區域名稱、命名空間 URI 和值的項目。Writes an element with the specified local name, namespace URI, and value.

WriteElementString(String, String, String, String) WriteElementString(String, String, String, String) WriteElementString(String, String, String, String) WriteElementString(String, String, String, String)

寫入具有指定的前置詞、區域名稱、命名空間 URI 和值的項目。Writes an element with the specified prefix, local name, namespace URI, and value.

備註

這個方法的非同步版本,請參閱WriteElementStringAsyncFor the asynchronous version of this method, see WriteElementStringAsync.

WriteElementString(String, String) WriteElementString(String, String) WriteElementString(String, String) WriteElementString(String, String)

寫入具有指定之區域名稱和值的項目。Writes an element with the specified local name and value.

public:
 void WriteElementString(System::String ^ localName, System::String ^ value);
public void WriteElementString (string localName, string value);
member this.WriteElementString : string * string -> unit
Public Sub WriteElementString (localName As String, value As String)

參數

localName
String String String String

項目的本機名稱。The local name of the element.

value
String String String String

項目的值。The value of the element.

例外狀況

localName 值為 null 或空字串。The localName value is null or an empty string.

-或--or- 參數值無效。The parameter values are not valid.

緩衝區中有一個字元,其為有效的 XML 字元,但對輸出編碼而言無效。There is a character in the buffer that is a valid XML character but is not valid for the output encoding. 比方說如果輸出的編碼方式為 ASCII,您應該在項目與屬性名稱中只使用範圍從 0 至 127 的字元。For example, if the output encoding is ASCII, you should only use characters from the range of 0 to 127 for element and attribute names. 無效的字元可能是在這個方法的引數中,或在先前已寫入至緩衝區的方法的引數中。The invalid character might be in the argument of this method or in an argument of previous methods that were writing to the buffer. 字元實體參考會盡可能逸出這類字元 (比方說在文字節點或屬性值中)。Such characters are escaped by character entity references when possible (for example, in text nodes or attribute values). 不過,在項目與屬性名稱、註解、處理指示或 CDATA 區段中不允許字元實體參考。However, the character entity reference is not allowed in element and attribute names, comments, processing instructions, or CDATA sections.

在先前的非同步作業完成前呼叫了 XmlWriter 方法。An XmlWriter method was called before a previous asynchronous operation finished. 在此情況下,會擲回 InvalidOperationException 與「非同步作業已經在進行中」的訊息。In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."

範例

下列範例會使用幾種寫入方法,來建立 XML 片段。The following example uses several write methods to create an XML fragment.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
public ref class Sample
{
private:
   static String^ m_Document = L"sampledata.xml";

public:
   static void Main()
   {
      XmlWriter^ writer = nullptr;
      try
      {
         XmlWriterSettings^ settings = gcnew XmlWriterSettings;
         settings->Indent = true;
         writer = XmlWriter::Create( m_Document,settings );
         writer->WriteComment( L"sample XML fragment" );
         
         // Write an element (this one is the root).
         writer->WriteStartElement( L"book" );
         
         // Write the namespace declaration.
         writer->WriteAttributeString( L"xmlns", L"bk", nullptr, L"urn:samples" );
         
         // Write the genre attribute.
         writer->WriteAttributeString( L"genre", L"novel" );
         
         // Write the title.
         writer->WriteStartElement( L"title" );
         writer->WriteString( L"The Handmaid's Tale" );
         writer->WriteEndElement();
         
         // Write the price.
         writer->WriteElementString( L"price", L"19.95" );
         
         // Lookup the prefix and write the ISBN element.
         String^ prefix = writer->LookupPrefix( L"urn:samples" );
         writer->WriteStartElement( prefix, L"ISBN", L"urn:samples" );
         writer->WriteString( L"1-861003-78" );
         writer->WriteEndElement();
         
         // Write the style element (shows a different way to handle prefixes).
         writer->WriteElementString( L"style", L"urn:samples", L"hardcover" );
         
         // Write the close tag for the root element.
         writer->WriteEndElement();
         
         // Write the XML to file and close the writer.
         writer->Flush();
         writer->Close();
      }
      finally
      {
         if ( writer != nullptr )
                  writer->Close();
      }

   }

};

void main()
{
   Sample::Main();
}

using System;
using System.IO;
using System.Xml;
 
 public class Sample
 {
   private const string m_Document = "sampledata.xml";
 
   public static void Main() {
   
      XmlWriter writer = null;

      try {
     
        XmlWriterSettings settings = new XmlWriterSettings();
        settings.Indent = true;
        writer = XmlWriter.Create (m_Document, settings);
           
        writer.WriteComment("sample XML fragment");
     
        // Write an element (this one is the root).
        writer.WriteStartElement("book");
 
        // Write the namespace declaration.
        writer.WriteAttributeString("xmlns", "bk", null, "urn:samples");
    
        // Write the genre attribute.
        writer.WriteAttributeString("genre", "novel");
         
        // Write the title.
        writer.WriteStartElement("title");
        writer.WriteString("The Handmaid's Tale");
        writer.WriteEndElement();
               
        // Write the price.
        writer.WriteElementString("price", "19.95");
      
        // Lookup the prefix and write the ISBN element.
        string prefix = writer.LookupPrefix("urn:samples");
        writer.WriteStartElement(prefix, "ISBN", "urn:samples");
        writer.WriteString("1-861003-78");
        writer.WriteEndElement();

        // Write the style element (shows a different way to handle prefixes).
        writer.WriteElementString("style", "urn:samples", "hardcover");
 
        // Write the close tag for the root element.
        writer.WriteEndElement();
               
        // Write the XML to file and close the writer.
        writer.Flush();
        writer.Close();
      }

      finally {
        if (writer != null)
           writer.Close();
     } 
   }
 
 }
Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    Private Shared m_Document As String = "sampledata.xml"
    
    Public Shared Sub Main()
        Dim writer As XmlWriter = Nothing
        
      Try

        Dim settings As XmlWriterSettings = new XmlWriterSettings()
        settings.Indent = true
        writer = XmlWriter.Create (m_Document, settings)
            
        writer.WriteComment("sample XML fragment")
            
        ' Write an element (this one is the root).
        writer.WriteStartElement("book")
            
        ' Write the namespace declaration.
        writer.WriteAttributeString("xmlns", "bk", Nothing, "urn:samples")
            
        ' Write the genre attribute.
        writer.WriteAttributeString("genre", "novel")
            
        ' Write the title.
        writer.WriteStartElement("title")
        writer.WriteString("The Handmaid's Tale")
        writer.WriteEndElement()
            
        ' Write the price.
        writer.WriteElementString("price", "19.95")
            
        ' Lookup the prefix and write the ISBN element.
        Dim prefix As String = writer.LookupPrefix("urn:samples")
        writer.WriteStartElement(prefix, "ISBN", "urn:samples")
        writer.WriteString("1-861003-78")
        writer.WriteEndElement()
            
        ' Write the style element (shows a different way to handle prefixes).
        writer.WriteElementString("style", "urn:samples", "hardcover")
            
        ' Write the close tag for the root element.
        writer.WriteEndElement()
            
        ' Write the XML to file and close the writer.
        writer.Flush()
        writer.Close()
        
        Finally
            If Not (writer Is Nothing) Then
                writer.Close()
            End If
        End Try

    End Sub 'Main 
End Class 'Sample

備註

這個方法的非同步版本,請參閱WriteElementStringAsyncFor the asynchronous version of this method, see WriteElementStringAsync.

WriteElementString(String, String, String) WriteElementString(String, String, String) WriteElementString(String, String, String) WriteElementString(String, String, String)

寫入具有指定之區域名稱、命名空間 URI 和值的項目。Writes an element with the specified local name, namespace URI, and value.

public:
 void WriteElementString(System::String ^ localName, System::String ^ ns, System::String ^ value);
public void WriteElementString (string localName, string ns, string value);
member this.WriteElementString : string * string * string -> unit
Public Sub WriteElementString (localName As String, ns As String, value As String)

參數

localName
String String String String

項目的本機名稱。The local name of the element.

ns
String String String String

與項目相關聯的命名空間 URI。The namespace URI to associate with the element.

value
String String String String

項目的值。The value of the element.

例外狀況

localName 值為 null 或空字串。The localName value is null or an empty string.

-或--or- 參數值無效。The parameter values are not valid.

緩衝區中有一個字元,其為有效的 XML 字元,但對輸出編碼而言無效。There is a character in the buffer that is a valid XML character but is not valid for the output encoding. 比方說如果輸出的編碼方式為 ASCII,您應該在項目與屬性名稱中只使用範圍從 0 至 127 的字元。For example, if the output encoding is ASCII, you should only use characters from the range of 0 to 127 for element and attribute names. 無效的字元可能是在這個方法的引數中,或在先前已寫入至緩衝區的方法的引數中。The invalid character might be in the argument of this method or in an argument of previous methods that were writing to the buffer. 字元實體參考會盡可能逸出這類字元 (比方說在文字節點或屬性值中)。Such characters are escaped by character entity references when possible (for example, in text nodes or attribute values). 不過,在項目與屬性名稱、註解、處理指示或 CDATA 區段中不允許字元實體參考。However, the character entity reference is not allowed in element and attribute names, comments, processing instructions, or CDATA sections.

在先前的非同步作業完成前呼叫了 XmlWriter 方法。An XmlWriter method was called before a previous asynchronous operation finished. 在此情況下,會擲回 InvalidOperationException 與「非同步作業已經在進行中」的訊息。In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."

範例

下列範例會使用幾種寫入方法,來建立 XML 片段。The following example uses several write methods to create an XML fragment.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
public ref class Sample
{
private:
   static String^ m_Document = L"sampledata.xml";

public:
   static void Main()
   {
      XmlWriter^ writer = nullptr;
      try
      {
         XmlWriterSettings^ settings = gcnew XmlWriterSettings;
         settings->Indent = true;
         writer = XmlWriter::Create( m_Document,settings );
         writer->WriteComment( L"sample XML fragment" );
         
         // Write an element (this one is the root).
         writer->WriteStartElement( L"book" );
         
         // Write the namespace declaration.
         writer->WriteAttributeString( L"xmlns", L"bk", nullptr, L"urn:samples" );
         
         // Write the genre attribute.
         writer->WriteAttributeString( L"genre", L"novel" );
         
         // Write the title.
         writer->WriteStartElement( L"title" );
         writer->WriteString( L"The Handmaid's Tale" );
         writer->WriteEndElement();
         
         // Write the price.
         writer->WriteElementString( L"price", L"19.95" );
         
         // Lookup the prefix and write the ISBN element.
         String^ prefix = writer->LookupPrefix( L"urn:samples" );
         writer->WriteStartElement( prefix, L"ISBN", L"urn:samples" );
         writer->WriteString( L"1-861003-78" );
         writer->WriteEndElement();
         
         // Write the style element (shows a different way to handle prefixes).
         writer->WriteElementString( L"style", L"urn:samples", L"hardcover" );
         
         // Write the close tag for the root element.
         writer->WriteEndElement();
         
         // Write the XML to file and close the writer.
         writer->Flush();
         writer->Close();
      }
      finally
      {
         if ( writer != nullptr )
                  writer->Close();
      }

   }

};

void main()
{
   Sample::Main();
}

using System;
using System.IO;
using System.Xml;
 
 public class Sample
 {
   private const string m_Document = "sampledata.xml";
 
   public static void Main() {
   
      XmlWriter writer = null;

      try {
     
        XmlWriterSettings settings = new XmlWriterSettings();
        settings.Indent = true;
        writer = XmlWriter.Create (m_Document, settings);
           
        writer.WriteComment("sample XML fragment");
     
        // Write an element (this one is the root).
        writer.WriteStartElement("book");
 
        // Write the namespace declaration.
        writer.WriteAttributeString("xmlns", "bk", null, "urn:samples");
    
        // Write the genre attribute.
        writer.WriteAttributeString("genre", "novel");
         
        // Write the title.
        writer.WriteStartElement("title");
        writer.WriteString("The Handmaid's Tale");
        writer.WriteEndElement();
               
        // Write the price.
        writer.WriteElementString("price", "19.95");
      
        // Lookup the prefix and write the ISBN element.
        string prefix = writer.LookupPrefix("urn:samples");
        writer.WriteStartElement(prefix, "ISBN", "urn:samples");
        writer.WriteString("1-861003-78");
        writer.WriteEndElement();

        // Write the style element (shows a different way to handle prefixes).
        writer.WriteElementString("style", "urn:samples", "hardcover");
 
        // Write the close tag for the root element.
        writer.WriteEndElement();
               
        // Write the XML to file and close the writer.
        writer.Flush();
        writer.Close();
      }

      finally {
        if (writer != null)
           writer.Close();
     } 
   }
 
 }
Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    Private Shared m_Document As String = "sampledata.xml"
    
    Public Shared Sub Main()
        Dim writer As XmlWriter = Nothing
        
      Try

        Dim settings As XmlWriterSettings = new XmlWriterSettings()
        settings.Indent = true
        writer = XmlWriter.Create (m_Document, settings)
            
        writer.WriteComment("sample XML fragment")
            
        ' Write an element (this one is the root).
        writer.WriteStartElement("book")
            
        ' Write the namespace declaration.
        writer.WriteAttributeString("xmlns", "bk", Nothing, "urn:samples")
            
        ' Write the genre attribute.
        writer.WriteAttributeString("genre", "novel")
            
        ' Write the title.
        writer.WriteStartElement("title")
        writer.WriteString("The Handmaid's Tale")
        writer.WriteEndElement()
            
        ' Write the price.
        writer.WriteElementString("price", "19.95")
            
        ' Lookup the prefix and write the ISBN element.
        Dim prefix As String = writer.LookupPrefix("urn:samples")
        writer.WriteStartElement(prefix, "ISBN", "urn:samples")
        writer.WriteString("1-861003-78")
        writer.WriteEndElement()
            
        ' Write the style element (shows a different way to handle prefixes).
        writer.WriteElementString("style", "urn:samples", "hardcover")
            
        ' Write the close tag for the root element.
        writer.WriteEndElement()
            
        ' Write the XML to file and close the writer.
        writer.Flush()
        writer.Close()
        
        Finally
            If Not (writer Is Nothing) Then
                writer.Close()
            End If
        End Try

    End Sub 'Main 
End Class 'Sample

備註

這個方法的非同步版本,請參閱WriteElementStringAsyncFor the asynchronous version of this method, see WriteElementStringAsync.

WriteElementString(String, String, String, String) WriteElementString(String, String, String, String) WriteElementString(String, String, String, String) WriteElementString(String, String, String, String)

寫入具有指定的前置詞、區域名稱、命名空間 URI 和值的項目。Writes an element with the specified prefix, local name, namespace URI, and value.

public:
 void WriteElementString(System::String ^ prefix, System::String ^ localName, System::String ^ ns, System::String ^ value);
public void WriteElementString (string prefix, string localName, string ns, string value);
member this.WriteElementString : string * string * string * string -> unit
Public Sub WriteElementString (prefix As String, localName As String, ns As String, value As String)

參數

prefix
String String String String

項目的前置詞。The prefix of the element.

localName
String String String String

項目的本機名稱。The local name of the element.

ns
String String String String

項目的命名空間 URI。The namespace URI of the element.

value
String String String String

項目的值。The value of the element.

例外狀況

localName 值為 null 或空字串。The localName value is null or an empty string.

-或--or- 參數值無效。The parameter values are not valid.

緩衝區中有一個字元,其為有效的 XML 字元,但對輸出編碼而言無效。There is a character in the buffer that is a valid XML character but is not valid for the output encoding. 比方說如果輸出的編碼方式為 ASCII,您應該在項目與屬性名稱中只使用範圍從 0 至 127 的字元。For example, if the output encoding is ASCII, you should only use characters from the range of 0 to 127 for element and attribute names. 無效的字元可能是在這個方法的引數中,或在先前已寫入至緩衝區的方法的引數中。The invalid character might be in the argument of this method or in an argument of previous methods that were writing to the buffer. 字元實體參考會盡可能逸出這類字元 (比方說在文字節點或屬性值中)。Such characters are escaped by character entity references when possible (for example, in text nodes or attribute values). 不過,在項目與屬性名稱、註解、處理指示或 CDATA 區段中不允許字元實體參考。However, the character entity reference is not allowed in element and attribute names, comments, processing instructions, or CDATA sections.

在先前的非同步作業完成前呼叫了 XmlWriter 方法。An XmlWriter method was called before a previous asynchronous operation finished. 在此情況下,會擲回 InvalidOperationException 與「非同步作業已經在進行中」的訊息。In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."

備註

這個方法的非同步版本,請參閱WriteElementStringAsyncFor the asynchronous version of this method, see WriteElementStringAsync.

適用於