XNode.AddBeforeSelf Método

Definição

Sobrecargas

Exemplos

O exemplo a seguir usa uma consulta LINQ para criar um IEnumerable<T> de XElement, que ele passa para esse método. Isso adiciona os resultados de uma consulta à árvore no local desejado.

XElement srcTree = new XElement("Root",  
    new XElement("Element1", 1),  
    new XElement("Element2", 2),  
    new XElement("Element3", 3),  
    new XElement("Element4", 4),  
    new XElement("Element5", 5)  
);  
XElement xmlTree = new XElement("Root",  
    new XElement("Child1", 1),  
    new XElement("Child2", 2),  
    new XElement("Child3", 3),  
    new XElement("Child4", 4),  
    new XElement("Child5", 5)  
);  
XElement child1 = xmlTree.Element("Child1");  
child1.AddBeforeSelf(  
    from el in srcTree.Elements()  
    where (int)el > 3  
    select el  
);  
Console.WriteLine(xmlTree);  

Dim srcTree As XElement = _   
        <Root>  
            <Element1>1</Element1>  
            <Element2>2</Element2>  
            <Element3>3</Element3>  
            <Element4>4</Element4>  
            <Element5>5</Element5>  
        </Root>  

Dim xmlTree As XElement = _   
        <Root>  
            <Child1>1</Child1>  
            <Child2>2</Child2>  
            <Child3>3</Child3>  
            <Child4>4</Child4>  
            <Child5>5</Child5>  
        </Root>  

Dim child1 As XElement = xmlTree.<Child1>(0)  
child1.AddBeforeSelf( _  
From el In srcTree.Elements() _  
Where CInt(el) > 3 _  
Select el)  

Console.WriteLine(xmlTree)  

Esse exemplo gera a saída a seguir:

<Root>  
  <Element4>4</Element4>  
  <Element5>5</Element5>  
  <Child1>1</Child1>  
  <Child2>2</Child2>  
  <Child3>3</Child3>  
  <Child4>4</Child4>  
  <Child5>5</Child5>  
</Root>  

Comentários

Para obter detalhes sobre o conteúdo válido que pode ser passado para esse método, consulte Conteúdo válido de objetos XElement e XDocument.

Esse método gerará os Changed eventos e Changing .

O XContainer armazena suas anotações filho como uma lista de XNode objetos vinculados. Isso significa que o AddBeforeSelf método deve percorrer a lista de nós filho diretos no contêiner pai. Portanto, usar esse método pode afetar seu desempenho.

public:
 void AddBeforeSelf(System::Object ^ content);

public void AddBeforeSelf (object content);

public void AddBeforeSelf (object? content);

member this.AddBeforeSelf : obj -> unit

Public Sub AddBeforeSelf (content As Object)

XElement xmlTree = new XElement("Root",  
    new XElement("Child1", 1),  
    new XElement("Child2", 2),  
    new XElement("Child3", 3),  
    new XElement("Child4", 4),  
    new XElement("Child5", 5)  
);  
XElement child1 = xmlTree.Element("Child1");  
child1.AddBeforeSelf(  
    new XElement("NewChild", 10)  
);  
Console.WriteLine(xmlTree);  

Dim xmlTree As XElement = _   
        <Root>  
            <Child1>1</Child1>  
            <Child2>2</Child2>  
            <Child3>3</Child3>  
            <Child4>4</Child4>  
            <Child5>5</Child5>  
        </Root>  

Dim child1 As XElement = xmlTree.<Child1>(0)  
child1.AddBeforeSelf(New XElement("NewChild", 10))  
Console.WriteLine(xmlTree)  

<Root>  
  <NewChild>10</NewChild>  
  <Child1>1</Child1>  
  <Child2>2</Child2>  
  <Child3>3</Child3>  
  <Child4>4</Child4>  
  <Child5>5</Child5>  
</Root>  

public:
 void AddBeforeSelf(... cli::array <System::Object ^> ^ content);

public void AddBeforeSelf (params object[] content);

public void AddBeforeSelf (params object?[] content);

member this.AddBeforeSelf : obj[] -> unit

Public Sub AddBeforeSelf (ParamArray content As Object())

XElement srcTree = new XElement("Root",  
    new XElement("Element1", 1),  
    new XElement("Element2", 2),  
    new XElement("Element3", 3),  
    new XElement("Element4", 4),  
    new XElement("Element5", 5)  
);  
XElement xmlTree = new XElement("Root",  
    new XElement("Child1", 1),  
    new XElement("Child2", 2),  
    new XElement("Child3", 3),  
    new XElement("Child4", 4),  
    new XElement("Child5", 5)  
);  
XElement child1 = xmlTree.Element("Child1");  
child1.AddBeforeSelf(  
    from el in srcTree.Elements()  
    where (int)el > 3  
    select el  
);  
Console.WriteLine(xmlTree);  

Dim srcTree As XElement = _   
        <Root>  
            <Element1>1</Element1>  
            <Element2>2</Element2>  
            <Element3>3</Element3>  
            <Element4>4</Element4>  
            <Element5>5</Element5>  
        </Root>  

Dim xmlTree As XElement = _   
        <Root>  
            <Child1>1</Child1>  
            <Child2>2</Child2>  
            <Child3>3</Child3>  
            <Child4>4</Child4>  
            <Child5>5</Child5>  
        </Root>  

Dim child1 As XElement = xmlTree.<Child1>(0)  
child1.AddBeforeSelf( _  
    From el In srcTree.Elements() _  
    Where CInt(el) > 3 _  
    Select el)  

Console.WriteLine(xmlTree)  

<Root>  
  <Element4>4</Element4>  
  <Element5>5</Element5>  
  <Child1>1</Child1>  
  <Child2>2</Child2>  
  <Child3>3</Child3>  
  <Child4>4</Child4>  
  <Child5>5</Child5>  
</Root>