XmlReader.ReadElementContentAsString XmlReader.ReadElementContentAsString XmlReader.ReadElementContentAsString XmlReader.ReadElementContentAsString Method

定义

读取当前元素并将内容作为 String 对象返回。Reads the current element and returns the contents as a String object.

重载

ReadElementContentAsString(String, String) ReadElementContentAsString(String, String) ReadElementContentAsString(String, String) ReadElementContentAsString(String, String)

检查指定的本地名称和命名空间 URI 与当前元素的本地名称和命名空间 URI 是否匹配,然后读取当前元素,并将内容作为 String 对象返回。Checks that the specified local name and namespace URI matches that of the current element, then reads the current element and returns the contents as a String object.

ReadElementContentAsString() ReadElementContentAsString() ReadElementContentAsString() ReadElementContentAsString()

读取当前元素并将内容作为 String 对象返回。Reads the current element and returns the contents as a String object.

ReadElementContentAsString(String, String) ReadElementContentAsString(String, String) ReadElementContentAsString(String, String) ReadElementContentAsString(String, String)

检查指定的本地名称和命名空间 URI 与当前元素的本地名称和命名空间 URI 是否匹配,然后读取当前元素,并将内容作为 String 对象返回。Checks that the specified local name and namespace URI matches that of the current element, then reads the current element and returns the contents as a String object.

public:
 virtual System::String ^ ReadElementContentAsString(System::String ^ localName, System::String ^ namespaceURI);
public virtual string ReadElementContentAsString (string localName, string namespaceURI);
abstract member ReadElementContentAsString : string * string -> string
override this.ReadElementContentAsString : string * string -> string
Public Overridable Function ReadElementContentAsString (localName As String, namespaceURI As String) As String

参数

localName
String String String String

元素的本地名称。The local name of the element.

namespaceURI
String String String String

元素的命名空间 URI。The namespace URI of the element.

返回

作为 String 对象的元素内容。The element content as a String object.

异常

XmlReader 未定位在元素上。The XmlReader is not positioned on an element.

- 或 --or-

在上一次异步操作完成之前调用了 XmlReader 方法。An XmlReader method was called before a previous asynchronous operation finished. 在此情况下,会引发 InvalidOperationException 并显示消息“异步操作已在进行中。”In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."

当前元素包含子元素。The current element contains child elements.

- 或 --or- 无法将元素内容转换为 String 对象。The element content cannot be converted to a String object.

使用 null 参数调用此方法。The method is called with null arguments.

指定的本地名称和命名空间 URI 与所读取的当前元素的本地名称和命名空间 URI 不匹配。The specified local name and namespace URI do not match that of the current element being read.

示例

下面的示例读取stringValue元素,并返回的文本内容 (忽略注释和处理指令)。The following example reads the stringValue element and returns the text content (ignoring the comment and processing instruction).

using (XmlReader reader = XmlReader.Create("dataFile.xml")) {
     reader.ReadToFollowing("stringValue");
     Console.WriteLine(reader.ReadElementContentAsString("stringValue", ""));
}
Using reader As XmlReader = XmlReader.Create("dataFile.xml")
  reader.ReadToFollowing("stringValue")
  Console.WriteLine(reader.ReadElementContentAsString("stringValue", ""))
End Using

示例使用 dataFile.xml 文件作为输入。The example uses the dataFile.xml file as input.

<root>
  <stringValue>
     <!--comment-->
     <?some pi?>
      text value of the element.
  </stringValue>
  <longValue>270000000000001</longValue>
  <number>0</number>
  <double>2E10</double>
  <date>2003-01-08T15:00:00-00:00</date>
</root>

注解

此方法读取开始标记,该元素的内容,并移过去的结束元素标记读取器。This method reads the start tag, the contents of the element, and moves the reader past the end element tag. 扩展实体并将忽略处理指令和注释。It expands entities and ignores processing instructions and comments. 元素只能包含简单内容。The element can only contain simple content. 也就是说,它不能有子元素。That is, it cannot have child elements.

有关详细信息,请参阅备注部分XmlReader参考页和W3C XML 架构第 2 部分:数据类型建议。For more information, see the Remarks section of the XmlReader reference page and the W3C XML Schema Part 2: Datatypes recommendation.

ReadElementContentAsString() ReadElementContentAsString() ReadElementContentAsString() ReadElementContentAsString()

读取当前元素并将内容作为 String 对象返回。Reads the current element and returns the contents as a String object.

public:
 virtual System::String ^ ReadElementContentAsString();
public virtual string ReadElementContentAsString ();
abstract member ReadElementContentAsString : unit -> string
override this.ReadElementContentAsString : unit -> string
Public Overridable Function ReadElementContentAsString () As String

返回

作为 String 对象的元素内容。The element content as a String object.

异常

XmlReader 未定位在元素上。The XmlReader is not positioned on an element.

- 或 --or-

在上一次异步操作完成之前调用了 XmlReader 方法。An XmlReader method was called before a previous asynchronous operation finished. 在此情况下,会引发 InvalidOperationException 并显示消息“异步操作已在进行中。”In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."

当前元素包含子元素。The current element contains child elements.

- 或 --or- 无法将元素内容转换为 String 对象。The element content cannot be converted to a String object.

使用 null 参数调用此方法。The method is called with null arguments.

示例

下面的示例读取stringValue元素,并返回的文本内容 (忽略注释和处理指令)。The following example reads the stringValue element and returns the text content (ignoring the comment and processing instruction).

using (XmlReader reader = XmlReader.Create("dataFile.xml")) {
     reader.ReadToFollowing("stringValue");
     Console.WriteLine(reader.ReadElementContentAsString());			
}
Using reader As XmlReader = XmlReader.Create("dataFile.xml")
  reader.ReadToFollowing("stringValue")
  Console.WriteLine(reader.ReadElementContentAsString())
End Using

示例使用 dataFile.xml 文件作为输入。The example uses the dataFile.xml file as input.

<root>
  <stringValue>
     <!--comment-->
     <?some pi?>
      text value of the element.
  </stringValue>
  <longValue>270000000000001</longValue>
  <number>0</number>
  <double>2E10</double>
  <date>2003-01-08T15:00:00-00:00</date>
</root>

注解

此方法读取开始标记,该元素的内容,并移过去的结束元素标记读取器。This method reads the start tag, the contents of the element, and moves the reader past the end element tag. 扩展实体并将忽略处理指令和注释。It expands entities and ignores processing instructions and comments. 元素只能包含简单内容。The element can only contain simple content. 也就是说,它不能有子元素。That is, it cannot have child elements.

有关详细信息,请参阅备注部分XmlReader参考页和W3C XML 架构第 2 部分:数据类型建议。For more information, see the Remarks section of the XmlReader reference page and the W3C XML Schema Part 2: Datatypes recommendation.

此方法的异步版本,请参阅ReadElementContentAsStringAsyncFor the asynchronous version of this method, see ReadElementContentAsStringAsync.

适用于