XObject.IXmlLineInfo.HasLineInfo メソッド

定義

この XObject に行情報があるかどうかを示す値を取得します。Gets a value indicating whether or not this XObject has line information.

 virtual bool System.Xml.IXmlLineInfo.HasLineInfo() = System::Xml::IXmlLineInfo::HasLineInfo;
bool IXmlLineInfo.HasLineInfo ();
Function HasLineInfo () As Boolean Implements IXmlLineInfo.HasLineInfo

戻り値

XObject に行情報がある場合は true。それ以外の場合は falsetrue if the XObject has line information; otherwise, false.

実装

この例では、ファイルから小さな XML ツリーを読み込み、ベース URI を設定し、行情報を保持するオプションを設定します。This example loads a small XML tree from a file, setting the options to set base URI and retain line information. 次に、行情報を持たない別の要素を追加します。It then adds another element that does not have line information. 次に、ツリー内の各要素の行情報を出力します。It then prints the line information for each element in the tree.

string markup = @"<Root>  
    <Child1 />  
    <Child2 />  
    <Child4 />  
</Root>";  
  
File.WriteAllText("Test.xml", markup);  
  
XElement po = XElement.Load("Test.xml",  
    LoadOptions.SetBaseUri | LoadOptions.SetLineInfo);  
  
// add a node to the tree.  
// the newly added node will not have line information.  
po.Element("Child2").AddAfterSelf(new XElement("Child3"));  
  
string[] splitUri = po.BaseUri.Split('/');  
Console.WriteLine("BaseUri: {0}", splitUri[splitUri.Length - 1]);  
Console.WriteLine();  
Console.WriteLine("{0}{1}{2}",  
    "Element Name".PadRight(20),  
    "Line".PadRight(5),  
    "Position");  
Console.WriteLine("{0}{1}{2}",  
    "------------".PadRight(20),  
    "----".PadRight(5),  
    "--------");  
foreach (XElement e in po.DescendantsAndSelf())  
    Console.WriteLine("{0}{1}{2}",  
        ("".PadRight(e.Ancestors().Count() * 2) + e.Name).PadRight(20),  
        ((IXmlLineInfo)e).HasLineInfo() ?  
            ((IXmlLineInfo)e).LineNumber.ToString().PadRight(5) :  
            "",  
        ((IXmlLineInfo)e).HasLineInfo() ?  
            ((IXmlLineInfo)e).LinePosition.ToString() :  
            "No Line Information");  
Dim markup As String = _  
    "<Root>" & Environment.NewLine & _  
    "    <Child1 />" & Environment.NewLine & _  
    "    <Child2 />" & Environment.NewLine & _  
    "    <Child4 />" & Environment.NewLine & _  
    "</Root>"  
  
File.WriteAllText("Test.xml", markup)  
  
Dim po As XElement = XElement.Load("Test.xml", LoadOptions.SetBaseUri Or LoadOptions.SetLineInfo)  
  
' add a node to the tree.  
' the newly added node will not have line information.  
po.Element("Child2").AddAfterSelf(New XElement("Child3"))  
  
Dim splitUri() As String = po.BaseUri.Split("/"c)  
Console.WriteLine("BaseUri: {0}", splitUri(splitUri.Length - 1))  
Console.WriteLine()  
Console.WriteLine("{0}{1}{2}", _  
    "Element Name".PadRight(20), _  
    "Line".PadRight(5), _  
    "Position")  
Console.WriteLine("{0}{1}{2}", _  
    "------------".PadRight(20), _  
    "----".PadRight(5), _  
    "--------")  
For Each e As XElement In po.DescendantsAndSelf()  
    Console.WriteLine("{0}{1}{2}", _  
        ("".PadRight(e.Ancestors().Count() * 2) & e.Name.ToString).PadRight(20), _  
        IIf(DirectCast(e, IXmlLineInfo).HasLineInfo(), _  
            DirectCast(e, IXmlLineInfo).LineNumber.ToString().PadRight(5), _  
            ""), _  
        IIf(DirectCast(e, IXmlLineInfo).HasLineInfo(), _  
            DirectCast(e, IXmlLineInfo).LinePosition.ToString(), _  
            "No Line Information"))  
Next  

この例を実行すると、次の出力が生成されます。This example produces the following output:

BaseUri: Test.xml  
  
Element Name        Line Position  
------------        ---- --------  
Root                1    2  
  Child1            2    6  
  Child2            3    6  
  Child3            No Line Information  
  Child4            4    6  

注釈

このメソッドを呼び出して、にXObject有効な行情報が含まれているかどうかを確認できます。You can call this method to determine whether the XObject contains valid line information.

このメソッドは、 IXmlLineInfoインターフェイス内のメソッドの明示的なインターフェイスメンバーの実装であるため、このメソッドを呼び出すには、にIXmlLineInfoキャストする必要があります。This method is an explicit interface member implementation of a method in the IXmlLineInfo interface, so in order to call this method, it is necessary to cast to IXmlLineInfo.

適用対象