能否取得不是最内层的xml元素的属性值?
比如,能否取得oaTypeCode的值?
<?xml version="1.0" encoding="utf-8"?>
<History>
<Attribute oaTypeCode="21" orderid="193">
<FieldType typename="AttributeVarchar"></FieldType>
<FieldType typename="AttributeOption">0</FieldType>
<FieldType typename="Attributetext"></FieldType><FieldType typename="AttributeNumber">0</FieldType><FieldType typename="AttributeBoolean">False</FieldType><FieldType typename="AttributeUnit"></FieldType><FieldType typename="AttributeDate">2005-1-1 0:00:00</FieldType></Attribute>
<Attribute oaTypeCode="22" orderid="193"><FieldType typename="AttributeVarchar"></FieldType><FieldType typename="AttributeOption"></FieldType><FieldType typename="Attributetext"></FieldType><FieldType typename="AttributeNumber">0</FieldType><FieldType typename="AttributeBoolean">True</FieldType><FieldType typename="AttributeUnit"></FieldType><FieldType typename="AttributeDate">0001-1-1 0:00:00</FieldType></Attribute>
<Attribute oaTypeCode="23" orderid="193"><FieldType typename="AttributeVarchar"></FieldType><FieldType typename="AttributeOption">109</FieldType><FieldType typename="Attributetext">002</FieldType><FieldType typename="AttributeNumber">0</FieldType><FieldType typename="AttributeBoolean">False</FieldType><FieldType typename="AttributeUnit"></FieldType><FieldType typename="AttributeDate">0001-1-1 0:00:00</FieldType></Attribute>
<Attribute oaTypeCode="24" orderid="193"><FieldType typename="AttributeVarchar">456456</FieldType><FieldType typename="AttributeOption"></FieldType><FieldType typename="Attributetext"></FieldType><FieldType typename="AttributeNumber">0</FieldType><FieldType typename="AttributeBoolean">False</FieldType><FieldType typename="AttributeUnit"></FieldType><FieldType typename="AttributeDate">0001-1-1 0:00:00</FieldType></Attribute>
<Attribute oaTypeCode="35" orderid="193"><FieldType typename="AttributeVarchar"></FieldType><FieldType typename="AttributeOption"></FieldType><FieldType typename="Attributetext"></FieldType><FieldType typename="AttributeNumber">0</FieldType><FieldType typename="AttributeBoolean">False</FieldType><FieldType typename="AttributeUnit"></FieldType><FieldType typename="AttributeDate">0001-1-1 0:00:00</FieldType>
</Attribute>
</History>