XmlWriter.WriteElementString 方法

參考

定義

命名空間:: System.Xml

組件:: System.Xml.ReaderWriter.dll

組件:: System.Xml.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

寫入包含字串值的項目。

多載

WriteElementString(String, String)	寫入具有指定之區域名稱和值的項目。
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。
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。

備註

如需這個方法的非同步版本，請參閱 WriteElementStringAsync 。

WriteElementString(String, String)

來源:: XmlWriter.cs

來源:: XmlWriter.cs

來源:: XmlWriter.cs

寫入具有指定之區域名稱和值的項目。

public:
 void WriteElementString(System::String ^ localName, System::String ^ value);

public void WriteElementString (string localName, 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

項目的本機名稱。

value: String

項目的值。

例外狀況

ArgumentException

localName 值為 null 或空字串。

-或-

參數值無效。

EncoderFallbackException

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。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。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。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)。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。

InvalidOperationException

在先前的非同步作業完成前呼叫了 XmlWriter 方法。在此情況下，會擲回 InvalidOperationException 與「非同步作業已經在進行中」的訊息。

範例

下列範例使用數個寫入方法來建立 XML 片段。

#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.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
End Class

備註

如需這個方法的非同步版本，請參閱 WriteElementStringAsync 。

適用於

WriteElementString(String, String, String)

來源:: XmlWriter.cs

來源:: XmlWriter.cs

來源:: XmlWriter.cs

寫入具有指定之區域名稱、命名空間 URI 和值的項目。

public:
 void WriteElementString(System::String ^ localName, System::String ^ ns, System::String ^ value);

public void WriteElementString (string localName, string ns, 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

項目的本機名稱。

ns: String

與項目相關聯的命名空間 URI。

value: String

項目的值。

例外狀況

ArgumentException

localName 值為 null 或空字串。

-或-

參數值無效。

EncoderFallbackException

InvalidOperationException

在先前的非同步作業完成前呼叫了 XmlWriter 方法。在此情況下，會擲回 InvalidOperationException 與「非同步作業已經在進行中」的訊息。

範例

下列範例使用數個寫入方法來建立 XML 片段。

#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.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
End Class

備註

如需這個方法的非同步版本，請參閱 WriteElementStringAsync 。

適用於

WriteElementString(String, String, String, String)

來源:: XmlWriter.cs

來源:: XmlWriter.cs

來源:: XmlWriter.cs

寫入具有指定的前置詞、區域名稱、命名空間 URI 和值的項目。

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);

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

項目的前置詞。

localName: String

項目的本機名稱。

ns: String

項目的命名空間 URI。

value: String

項目的值。

例外狀況

ArgumentException

localName 值為 null 或空字串。

-或-

參數值無效。

EncoderFallbackException

InvalidOperationException

在先前的非同步作業完成前呼叫了 XmlWriter 方法。在此情況下，會擲回 InvalidOperationException 與「非同步作業已經在進行中」的訊息。

備註

如需這個方法的非同步版本，請參閱 WriteElementStringAsync 。

適用於

共用方式為

XmlWriter.WriteElementString 方法

定義

多載

備註

WriteElementString(String, String)

參數

例外狀況

範例

備註

適用於

WriteElementString(String, String, String)

參數

例外狀況

範例

備註

適用於

WriteElementString(String, String, String, String)

參數

例外狀況

備註

適用於

其他資源