XmlAttributeCollection.InsertBefore(XmlAttribute, XmlAttribute) 方法

定義

命名空間:

System.Xml

組件:

System.Xml.ReaderWriter.dll

來源:

XmlAttributeCollection.cs

在指定的參考屬性之前，立即插入指定的屬性。

public:
 System::Xml::XmlAttribute ^ InsertBefore(System::Xml::XmlAttribute ^ newNode, System::Xml::XmlAttribute ^ refNode);

public System.Xml.XmlAttribute InsertBefore (System.Xml.XmlAttribute newNode, System.Xml.XmlAttribute? refNode);

member this.InsertBefore : System.Xml.XmlAttribute * System.Xml.XmlAttribute -> System.Xml.XmlAttribute

Public Function InsertBefore (newNode As XmlAttribute, refNode As XmlAttribute) As XmlAttribute

參數

newNode

XmlAttribute

要插入的屬性。

refNode

XmlAttribute

參考屬性。 newNode 會置於 refNode 之前。

傳回

XmlAttribute

要插入至集合的 XmlAttribute。

例外狀況

ArgumentException

newNode 由不同於建立這個集合的另一個文件所建立。 或者 refNode 並非這個集合的成員。

範例

下列範例會將新的屬性新增至檔。

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;

int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book ISBN='1-861001-57-5'><title>Pride And Prejudice</title></book>" );
   
   //Create a new attribute.
   XmlAttribute^ newAttr = doc->CreateAttribute( "genre" );
   newAttr->Value = "novel";
   
   //Create an attribute collection and add the new attribute
   //to the collection.
   XmlAttributeCollection^ attrColl = doc->DocumentElement->Attributes;
   attrColl->InsertBefore( newAttr, attrColl[ 0 ] );
   Console::WriteLine( "Display the modified XML...\r\n" );
   Console::WriteLine( doc->OuterXml );
}

using System;
using System.IO;
using System.Xml;

public class Sample
{
  public static void Main(){

    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "</book>");

    //Create a new attribute.
    XmlAttribute newAttr = doc.CreateAttribute("genre");
    newAttr.Value = "novel";

    //Create an attribute collection and add the new attribute
    //to the collection.
    XmlAttributeCollection attrColl = doc.DocumentElement.Attributes;
    attrColl.InsertBefore(newAttr, attrColl[0]);

    Console.WriteLine("Display the modified XML...\r\n");
    Console.WriteLine(doc.OuterXml);
  }
}

Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()
  
    Dim doc as XmlDocument = new XmlDocument()
    doc.LoadXml("<book ISBN='1-861001-57-5'>" & _
                "<title>Pride And Prejudice</title>" & _
                "</book>")      

    'Create a new attribute.
    Dim newAttr as XmlAttribute = doc.CreateAttribute("genre")
    newAttr.Value = "novel"

    'Create an attribute collection and add the new attribute
    'to the collection.  
    Dim attrColl as XmlAttributeCollection = doc.DocumentElement.Attributes
    attrColl.InsertBefore(newAttr, attrColl.ItemOf(0))

    Console.WriteLine("Display the modified XML...")
    Console.WriteLine(doc.OuterXml)

  end sub
end class

備註

如果集合中已經有同名的屬性，則會從集合中移除原始屬性，並 newNode 插入集合中。 如果 refNode 為 null ， newNode 則會插入集合結尾。

此方法是檔物件模型 (DOM) Microsoft延伸模組。