XObject.IXmlLineInfo.LineNumber 属性

定义

获取基础 XmlReader 为此 XObject 报告的行号。Gets the line number that the underlying XmlReader reported for this XObject.

property int System::Xml::IXmlLineInfo::LineNumber { int get(); };
int System.Xml.IXmlLineInfo.LineNumber { get; }
member this.System.Xml.IXmlLineInfo.LineNumber : int
 ReadOnly Property LineNumber As Integer Implements IXmlLineInfo.LineNumber

属性值

一个 Int32,其中包含 XmlReader 为此 XObject 报告的行号。An Int32 that contains the line number reported by the XmlReader for this XObject.

实现

示例

此示例从文件中加载一个小型 XML 树,并将选项设置为设置基 URI 和保留行信息。This example loads a small XML tree from a file, setting the options to set base URI and retain line information. 然后,它添加另一个不包含行信息的元素。It then adds another element that does not have line information. 然后打印树中每个元素的行信息。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  

该示例产生下面的输出: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  

注解

此方法是 IXmlLineInfo 接口中的方法的显式接口成员实现,因此为了调用此方法,需要将转换为 IXmlLineInfoThis 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.

适用于

另请参阅