QDomAttr Class Reference
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QtXml

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QDomAttr 类表示一个属性在 QDomElement . 更多...

方法

__init__ ( self )
__init__ ( self , QDomAttr x )
QString name ( self )
QDomNode.NodeType nodeType ( self )
QDomElement ownerElement ( self )
setValue ( self , QString)
bool specified ( self )
QString value ( self )

详细描述

QDomAttr 类表示一个属性在 QDomElement .

For example, the following piece of XML produces an element with no children, but two attributes:

 <link href="http://qt.nokia.com" color="red" />

You can access the attributes of an element with code like this:

 QDomElement e = //...
 //...
 QDomAttr a = e.attributeNode("href");
 cout << a.value() << endl;                // prints "http://qt.nokia.com"
 a.setValue("http://qt.nokia.com/doc"); // change the node's attribute
 QDomAttr a2 = e.attributeNode("href");
 cout << a2.value() << endl;               // prints "http://qt.nokia.com/doc"

This example also shows that changing an attribute received from an element changes the attribute of the element. If you do not want to change the value of the element's attribute you must use cloneNode () to get an independent copy of the attribute.

QDomAttr 可以返回 name () and value () of an attribute. An attribute's value is set with setValue ()。若 specified () returns true the value was set with setValue ()。 node this attribute is attached to (if any) is returned by ownerElement ().

有关文档对象模型的进一步信息，见 http://www.w3.org/TR/REC-DOM-Level-1/ and http://www.w3.org/TR/DOM-Level-2-Core/ . For a more general introduction of the DOM implementation see the QDomDocument 文档编制。

方法文档编制

QDomAttr.init ( self )

构造空属性。

QDomAttr.init ( self , QDomAttr x )

构造副本为 x .

The data of the copy is shared (shallow copy): modifying one node will also change the other. If you want to make a deep copy, use cloneNode ().

QString QDomAttr.name ( self )

返回属性的名称。

QDomNode.NodeType QDomAttr.nodeType ( self )

返回 AttributeNode .

QDomElement QDomAttr.ownerElement ( self )

返回附加此属性到的元素节点或 null 节点 if this attribute is not attached to any element.

QDomAttr.setValue ( self , QString)

将属性的值设为 v .

另请参阅 value ().

bool QDomAttr.specified ( self )

Returns true if the attribute has been set by the user with setValue (). Returns false if the value hasn't been specified or set.

另请参阅 setValue ().

QString QDomAttr.value ( self )

Returns the value of the attribute or an empty string if the attribute has not been specified.

另请参阅 specified () 和 setValue ().

QDomAttr Class Reference [ QtXml module]

方法